BC354 Catalog Number NEMA 4X, IP65

BC354 Catalog Number NEMA 4X, IP65
NEMA-4X—IP65
for Catalog BC354
6/15
Installation & Operating Manual
MN731
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Table of Contents
Chapter 1
Introduction
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Safety Notice. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Receiving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Chapter 2
Installation
Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Electrical Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
AC Line. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Ground Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Motor Armature Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Remote Start/Stop Switch Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Run Relay Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Voltage Following Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Inhibit Circuit Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Enable Circuit Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
DC Tachometer Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Signal Isolator Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Startup and Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Motor Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Torque Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Set Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
J1 - Motor Voltage Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
J2 - Motor Current Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
J3 - Current Limit Mode Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
J1, J4 - Tachometer Feedback and DC Tachometer Voltage Selection. . . . . . . . . . . . . . . . . . . 2-9
J5 - Run Relay Output Mode Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
J6 - Stop Mode Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
J7 - Enable (J7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Trimpot Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Acceleration (ACCEL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Deceleration (DECEL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Maximum Speed (MAX). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Minimum Speed (MIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Jog Speed (JOG). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Current Limit (CL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Timed Current Limit (TCL). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
IR Compensation (IR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Appendix A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
MN731
i
ii
MN731
Chapter 1
Introduction
Introduction
Baldor Electric Company. is committed to providing total customer satisfaction by producing quality
products that are easy to install and operate. The BC354 is manufactured with surface mount
components incorporating advanced circuitry and technology.
The BC354 is a PWM (Pulse Width Modulated) control in a NEMA-4X/IP65 washdown and watertight
enclosure designed to operate Permanent Magnet and Shunt Wound motors through 7.5 Amps DC.
The efficient PWM waveform, operating at a switching frequency greater than 16kHz, provides
almost pure DC to the motor (form factor <1.05). This provides high motor efficiency, whisper quiet
operation along with less motor heating. This allows for a smaller, less costly motor to be used in most
applications. Another advantage of PWM is higher output voltage (up to 130VDC for 115VAC lines and
260VDC for 230VAC lines) which provides increased motor speed.
SAFETY NOTICE
A Warning statement indicates a potentially hazardous situation which, if not avoided, could result in
injury or death.
A Caution statement indicates a potentially hazardous situation which, if not avoided, could result in
damage to property.
A Note indicates additional information that is not critical to the installation or operation.
WARNING: This equipment may contain voltages as high as 1000 volts! Electrical shock can cause serious or fatal
injury. Only qualified personnel should attempt the start-up procedure or troubleshoot this equipment.
WARNING: Be sure the system is properly grounded before applying power. Do not apply AC power before you ensure
that all grounding instructions have been followed. Electrical shock can cause serious or fatal injury.
WARNING: Electrical shock can cause serious or fatal injury. Be sure that all power is disconnected and there is
no voltage present from this equipment or equipment to which it is or will be connected. Electrical
shock can cause serious or fatal injury. Only qualified personnel should attempt the installation and
start-up procedures.
WARNING: Electrical shock can cause serious or fatal injury. Verify there is no voltage phase-to-phase or phaseto-neutral at the motor leads before connecting motor to this control. Motor may have high voltage
present even when disconnected from this control.
WARNING: Do not use motor overload relays with an automatic reset feature. These are dangerous since the
process may injure someone if a sudden or unexpected automatic restart occurs. If manual reset
relays are not available, disable the automatic restart feature using external control wiring.
WARNING: This unit has an automatic restart feature that will start the motor whenever input power is applied
and a RUN (FWD or REV) command is issued. If an automatic restart of the motor could cause injury to
personnel, the automatic restart feature should be disabled.
WARNING: Using a jumper to eliminate the start/stop function will cause the motor to run at the Main Speed
Potentiometer setting when the AC line is applied.
WARNING: If possible, do not adjust trim pots with the main power applied. Electrical shock can cause serious or
fatal injury. If adjustments are made with the main power applied, an insulated adjustment tool must
be used to prevent shock hazard and safety glasses must be worn.
WARNING: Do not use this drive in an explosive environment. An explosion can cause serious or fatal injury.
This drive is not explosion proof.
WARNING: When the Enable jumper is installed, the drive and motor will start and run when AC power is applied,
when power is restored after a momentary power loss, or after an overload or TCL fault is reset. The
user must ensure that automatic start up of the driven equipment will not cause injury to operating
personnel or damage to the driven equipment. The user is responsible for providing suitable audible or
visual alarms or other devices to indicate that the drive may start at any moment. Failure to observe
this warning could result in severe bodily injury or loss of life.
WARNING: Do not use start/stop, inhibit or enable functions as a safety disconnect. Use only an AC line disconnect
for that purpose. Failure to observe this warning could result in severe bodily injury or loss of life.
Caution: Disconnect motor leads (A1 and A2) from control before you perform a Dielectric Withstand test on the motor.
Failure to disconnect motor from the control will result in extensive damage to the control. The control is tested
at the factory for high voltage / leakage resistance as part of Underwriter Laboratory requirements.
Caution: Do not connect AC power to the Motor terminals A1 and A2. Connecting AC power to these terminals
may damage the control.
MN731
1-1
SAFETY NOTICE Continued
Caution: Baldor recommends not to use Grounded Leg Delta transformer power leads that may create ground
loops. Instead, we recommend using a four wire Wye.
Caution: Suitable for use on a circuit capable of delivering not more than 5,000 RMS symmetrical short circuit
amperes listed here at rated voltage.
Caution: Adjusting the current limit above 150% of the motor nameplate rating can cause overheating and
demagnetization of the PM motor.
Caution: Do not leave the motor in a locked rotor condition for more than a few seconds since motor damage
may occur.
Caution: Shunt wound motors may be damaged if field windings remain energized for an extended period of
time without armature rotation.
Receiving
Each control is thoroughly tested at the factory and carefully packaged for shipment.
When you receive your control, there are several things you should do immediately.
1. Observe the condition of the shipping container and report any damage immediately to the
commercial carrier that delivered your control.
2. Verify that the part number you received is the same as the part number listed on your purchase order.
3. Do not unpack until ready for use.
Table 1-1 Electrical Ratings
AC Voltage
(+/- 10%,
Motor
50/60 Hz) Voltage (VDC)
(Volts AC)
Max AC
Current
(Amps
RMS)
Fuse or
Circuit
Breaker
Rating
(Amps DC)
Max Load
Current
(Amps DC)
115
0 – 90,130
208 - 230 0 – 180, 260
0 – 90*, 130
11.5
11.5
11.5
15
15
15
7.5
7.5
7.5
Maximum Power
HP (kW)
SCR Rated
Motors
PWM Rated
Motors
3/4, (0.5)
1-1/2, (1)
3/4, (0.5)
1, (0.75)
2, (1.5)
1, (0.75)
Rated Field Field Voltage
Current
(Volts DC)
1.0
1.0
1.0
100
200
100
Table 1-2 Performance Specifications
Parameter
Operating Frequency (kHz)
Operating Temperature Range at Full Rating (°C/°F)
Operating Humidity Range % Relative, Non-Condensing)
Storage Temperature (°C/°F)
Current Range (High Scale) (Amps DC)
Current Range (Low Scale) (Amps DC)1
ACCEL and DECEL Range (Seconds)
Jog Speed (% Base Speed)
MIN SPEED Range (% Base Speed (90 and 180 Volt DC Motors))
MAX SPEED Range (% Base Speed (90 and 180 Volt DC Motors))
IR COMP Range at 90 Volts DC Output (ΔVolts DC at Full Load)
IR COMP Range at 180 Volts DC Output (ΔVolts DC at Full Load)
CL Range (% Range Setting)
Specification
>16
0 - 40 / 32 - 104
0 - 95
-25 – +85 / -13 – +185
1.7, 2.5, 3.5, 5.0, 7.5
0.2, 0.3, 0.4, 0.5, 0.8
0.5 - 10
0 - 50
0 - 30
50 - 140
0 - 15
0 - 30
0 - 200
Timed Current Limit (TCL) Range (Seconds)
0.5 - 10
AC Line Input Voltage (Volts AC, ±10%, 50/60Hz)
115 -208/230
AC Line Regulation (% Base Speed)
0.5
Armature Voltage Range at 115 Volts AC Line Input (Volts DC)
0 - 130
Armature Voltage Range at 208/230 Volts AC Line Input (Volts DC)
0 - 1302, 0 - 260
Armature Feedback Load Regulation (% Base Speed)
1
Tachometer Feedback Load Regulation (% Set Speed)
1
Field Voltage at 115 Volts AC Line Input (Volts DC)
100/50
Field Voltage at 208/230 Volts AC Line Input (Volts DC)
200/100
Speed Range (Ratio)
50:1
Voltage Following Linearity (% Base Speed)
±0.5
1. For low current operation, remove resistor R35, see Appendix A.
2. Step-down operation. Motor may have reduced brush life. Consult motor manufacturer.
1-2
Factory Setting
−
−
−
−
7.5
−
1
15
0
100
4
8
150
5
−
−
90
90
−
−
−
−
−
−
MN731
Chapter 2
Installation
WARNING: Do not use this drive in an explosive environment. An explosion can cause serious or fatal injury.
This drive is not explosion proof.
Mounting
The control should be mounted vertically on a flat surface with adequate ventilation. Allow enough
room below the control to allow for AC line, motor connections, and any other wiring. Although
the control is designed for outdoor and wash down use, care should be taken to avoid extreme
hazardous locations where physical damage can occur. Mount the control in such a manner that
there is unrestricted air flow through the heat sink cooling fins. If the control is mounted in a closed,
unventilated location, allow enough room for proper heat dissipation so that the ambient temperature
does not exceed 40°C (104°F).
Mount the control as shown in Figure 2-1.
Figure 2-1 Mounting Hole Locations
5.00
[127.00]
5.47
[138.99]
2*
4*
5.89
[149.50]
0.36
[9.07]
8.23
[208.94]
8.88
[225.45]
* Tighten the four cover screws,
in the sequence shown, to
12 in-lbs (14 kg-cm).
DC MOTOR SPEED CONTROL
1*
3*
9.49
[241.00]
The BC354 is designed with a hinged case so that when the front cover is open, all wiring stays
intact. To open the cover, the four screws must be loosened so they are no longer engaged in the case
bottom. After mounting and wiring, close the cover and make sure that wires will not get caught or
crimped as the cover is closed. Tighten all four cover screws, in the diagonal sequence so the gasket
is slightly compressed (12 in-lbs (14 kg-cm)). Do not over tighten.
MN731
2-1
Electrical Connections
To avoid erratic operation, do not bundle the AC line and motor wires with signal or control wiring.
Do not bundle motor wires from multiple controls in the same conduit. Use shielded cables on all
signal wiring over 12 (30 cm). The shield should be earth grounded on the control side only. Wire the
control in accordance with the National Electrical Code requirements and other local codes that may
apply.
The control does not contain AC line fuses. Most electrical codes require that each ungrounded
conductor contain circuit protection. Install a 20 Amp fuse (Littelfuse 326, BUSS ABC or equivalent) or
a circuit breaker in series with each ungrounded conductor. Check all electrical codes that apply to
the application.
A separate AC line switch or contactor must be connected as a disconnect switch so that contacts
open each ungrounded conductor. See Table 2-1.
AC LINE
Connect the AC input to L1 & L2 of TB1, Figure 2-2.
Table 2-1 Terminal Block Wiring Information
Terminal
Block
Designation
Connections
Max Wire Size
(Copper)
AWG(mm2)
Tightening
Torque
lb-in (Nm)
TB1
AC Input
L1 and L2
14
9 (10.4)
TB1
Motor Armature
A1 and A2
14
9 (10.4)
TB2
Motor Field (Shunt Wound Motors Only)
F1 and F2
14
3.5 (4)
TB3
Tachometer
T+ and T-
14
3.5 (4)
TB3
Run Relay
Relay
14
3.5 (4)
Ground Connection
Earth ground the control chassis using the green ground screw that is provided on the inside of the
control to the right side of Terminal Block TB1, as shown in Figure 2-2.
Motor Armature Connection
Connect the motor armature positive lead (+) to Terminal A1 and negative lead (-) to Terminal A2,
Figure 2-2. For step-down operation (230 Volt AC line input with 90 Volt DC SCR rated motor or
130 VDC PWM rated motor) set jumper J1 to 90V position. However, in step-down operation the motor
may have reduced brush life - consult motor manufacturer.
Note: Do not connect motor armature leads to F+ and F- terminals of Terminal Block TB2 or to F1 and F2
quick-connect terminals. Do not use F1 and F2 quick-connect terminals for any purpose other than
to power the optional Signal Isolator BC245.
Full Voltage Field Connection (Shunt Wound Motors Only)
Wire the motor field leads to F+ and F- terminals of Terminal Block TB2, as shown in Figure 2-2 and
as described in Table 2-2.
Note: Do not connect motor armature leads to F1 and F2 quickconnect terminals. Do not use F+ and
F- terminals of Terminal Block TB2 for any purpose other than to power the field of a shunt wound
motor.
2-2
MN731
Figure 2-2 Full Voltage Field Connection (Shunt Wound MotorsOnly)
F1
TB2
+
F2
TB1
-
A1
A2
+
FIELD
L1
L2
GROUND
SCREW
-
M
MOTOR
AC LINE
INPUT
Half Voltage Field Connection (Shunt Wound Motors Only)
Connect the motor field leads to F+ terminal of Terminal Block TB2 and L1 terminal of Terminal Block
TB1, as shown in Figure 2-3 and as described in Table 2-2.
Figure 2-3 Half Voltage Field Connection (Shunt Wound Motors Only)
F1
TB2
FIELD
F2
TB1
+
-
A1
+
A2 L1 L2
GROUND
SCREW
-
M
MOTOR
AC LINE
INPUT
Table 2-2 Field Connection (Shunt Wound Motors Only)
AC Line (VAC)
115
115
230
230
230
Armature Voltage (VDC)
90 - 130
90 - 130
180 - 260
180 - 260
90 - 130
Field Voltage (VDC)
100
50
200
100
100
Field Connections
F1 and F2
F1 and L1
F1 and F2
F1 and L1
F1 and L1
Remote Main Speed Potentiometer
A Main Speed Potentiometer is mounted on the front cover for unidirectional forward operation of the
motor as shown in Figure 2-5.
The Speed Potentiometer can be disconnected and a remote potentiometer (5k) can be used.
Remove the white, orange, and violet potentiometer leads from P1, P2, and P3 terminals. The leads
may be taped and left inside the control. The potentiometer assembly may be removed if a watertight
seal is used to cover the hole in the front cover. Connect the remote main speed potentiometer wires
to terminals P1 (low side), P2 (wiper), and P3 (high side), as shown in Figure2-4.
Figure 2-4 Remote Main Speed Potentiometer Connection
HIGH SIDE
WIPER
LOW SIDE
MAIN SPEED
POTENTIOMETER
(FRONT VIEW)
MN731
2-3
Figure 2-5 Control Board Layout
LED Board
ACCEL DECEL
MAX
MIN
JOG
CL
TCL
IR
CON1
INH1
TCL NTCL
J3
INH2
STOP
START J6
Start/Stop
Switch
COM
NO
NC
STOP
RELAY
JOG
NC NO
J5
P3
Main Speed
Potentiometer
P1
TB3
K2
K1
RELAY
P2
T
TACH
TT+
EN
J7 ENABLE
EN2
EN1
J4
180V
J2
H L
AMP
7.5 0.8
5.0 0.5
3.5 0.4
2.5 0.3
1.7 0.2
7V 50V
R35
BLU BLU WHT WHT
ORN RED WHT BLK
CON2
TB2
2-4
J1
90V
F1
L1A J7A L1B L2A
J7B
L2B
A1B J6A A1A A2B J6B A2A
TB1
F2
A1
A2
L1
L2
MN731
Remote Start/Stop Switch Connection
Warning! Eliminating the start/stop function when a jumper is installed, the drive and motor will start and run
when ac power is applied, when power is restored after a momentary power loss, or after an overload
or tcl fault is reset. The user must ensure that automatic startup of the driven equipment will not
cause injury to the operating personnel or damage to driven equipment. The user is responsible for
providing suitable audible or visual devices to indicate that the drive may start at any moment. Failure
to observe this warning could result in severe bodily injury or loss of life.
The control is supplied with a prewired Start/Stop switch, with normally open stop contacts mounted
on the front cover. Jumper J6 is factory set to the NO position. To operate the control from a remote
Start/Stop switch (type: (ON)-OFF-ON, SPDT), remove the white, black, and red wires from START,
COM, and STOP terminals. The leads may be taped and left in the control. The switch assembly may
be removed if a watertight seal is used to cover the hole in the front cover. Connect the remote Start/
Stop switch wires to START (momentary), COM (common), and STOP (maintained) terminals as shown
in Figure 2-6. After applying power, momentarily set the Start/Stop switch to START position. The
motor will operate at the set speed of the main speed potentiometer. To stop the motor, set the Start/
Stop switch to STOP position.
Note: To eliminate the Start/Stop function, connect the START and COM terminals with the jumper that is
provided.
Figure 2-6 Remote Start/Stop Switch Connection
Figure START
START
STOP
WHITE
BLACK
RED
START
COM
STOP
STOP
Normally Closed
Momentary Contact
(Open to Stop)
STOP
with Normally Open Stop Contacts
START J6
STOP
START/STOP SWITCH
Normally Open
Momentary Contact
(Close to Start)
INH1
INH2
COM
NO
NC
STOP
with Normally Closed Stop Contacts
Run Relay Connection
Run Relay, K1, Normally open (N.O.) or normally closed (N.C.) relay output contacts are available at
TB3. These contacts will change state when the Start/Stop switch is set to START position or if the
control shuts down and goes into STOP mode from TCL. The run relay is used to indicate the state of
the control (run or stop).
Normally open or normally closed run relay contact outputs can be selected depending on the position
of jumper J5. If normally open is selected (J5 in N.O. position), the run relay output contacts will close
when the Start/Stop switch is set to START position. If normally closed is selected (J5 set to N.C.
position), the run relay output contacts will open when the Start/Stop switch is set to START position.
When the control shuts down and goes into STOP mode from TCL, or the Start/Stop switch is set to
STOP position, the Run Relay output contacts will be what the J5 position indicates. See Figure 2-7.
Figure 2-7 Run Relay Connections
K2
K1
RELAY
TB3
RELAY
See Table 4-1, for TB3 Tightening Torque Requirements.
MN731
2-5
The Run Relay Contact status for various drive operating conditions is shown in Table 2-3. Relay
Contacts Ratings: 1 Amp at 30 Volts DC, 0.5 Amps at 125 Volts AC, and 0.25 Amps at 250 Volts AC.
Table 2-3 Drive Operating Condition and Run Relay Contact Status
J3 in NTCL Position
J3 in TCL Position
J5 Position
J5 Position
Drive
Operating
Condition
Description
NO
NC
NO
NC
Power Off
Main Power
Disconnected
Open
Closed
Open
Closed
Run Mode1
Normal Drive
Operation
Closed
Open
Closed
Open
Stop Mode2
Selected by
Operator
Open
Closed
Open
Closed
Fault3
Drive Tripped
-
-
Open
Closed
1. Run Mode is selected with the optional FWD–BRK-REV Switch.
2. Stop Mode is selected using the optional FWD-BRK-REV Switch.
3. TCL Fault.
4. If relay output contacts are not required for your application, J5 may be in any position.
Voltage Following Connection
An isolated 0 - 10 Volt DC analog signal can also be used to control motor speed. See Figure 2-8.
Note: If an isolated signal voltage is not available, an optional signal isolator can be installed (P/N
BC145). Connect the isolated signal voltage to P2 (+) and P1 (-) terminals. Adjustment of the MIN
trimpot may be necessary to achieve a 0 Volt DC output.
Figure 2-8 Voltage Following Connection
0 - 10V DC
(ISOLATED)
P3
P2
P1
Inhibit Circuit Connection
The control is supplied with inhibit terminals (INH1 and INH2) to connect an Inhibit switch. See Figure
2-9. These terminals are used to electronically stop the control. When the Inhibit switch is closed, the
control will coast to stop. When the Inhibit switch is opened, the control will accelerate to the main
speed potentiometer setting.
Figure 2-9 Inhibit Circuit Connection
INHIBIT SWITCH
(Open to Run)
(Close to Stop)
2-6
MN731
Enable Circuit Connection
There are two methods to incorporate an ENABLE function In the BC354. Either method of connection
may be used to START and STOP the control.
Note: When using Enable, the Start/Stop function should be eliminated. Remove the white, black, and
red wires from Terminals START, COM, and STOP. The leads may be taped and left in the control.
The switch assembly may be removed if a watertight seal is used to cover the hole on the front
cover. Connect Terminals START and COM with the jumper that is provided.
Method 1: Connect a switch to the dedicated Enable Terminals EN1 and EN2 on TB3. Remove Jumper
J7. See Figure 4-10. When the Enable Switch is closed, the motor will accelerate to the Main Speed
Potentiometer setting. When the Enable Switch is opened, the motor will coast to stop.
Figure 2-10 Enable Switch Wired into TB3
EN
J7 ENABLE
EN2
ENABLE SWITCH
(Close to Run)
(Open to Stop)
EN1
Jumper
Removed
Method 2: Connect a switch in series with the violet main speed potentiometer lead which connects
to the P3 terminal. When the Enable switch is closed, the motor will accelerate to the main speed
potentiometer setting. When the Enable switch is opened, the motor will decelerate to a stop. See
Figure 2-11.
Note: Jumper J7 must be installed when using the ENABLE circuit.
Figure 2-11 Enable Switch Wire into the Main Speed Potentiometer Circuit
SWITCH OR RELAY
(CLOSE TO START)
VLT
P3
ORG
P2
WHT
P1
MAIN SPEED
POTENTIOMETER
DC Tachometer Connection
Connect the tachometer to T+ (+) and T- (-) terminals of TB4 as shown in Figure 4-12. Jumper J1
must be in ‘T ‘ position. Jumper J4 must be in ‘7V ‘ position for 7 Volt per 1000 RPM tachometer or
‘50V ‘ position for 50 Volt per 1000 RPM tachometers. See Startup for tachometers other than 7V or
50V per 1000 RPM.
Note: When using a tachometer, the IR trimpot should be set fully counterclockwise.
Figure 2-12 DC Tachometer Connection
P3
DC TACHOMETER
-
K1
TB3
T-
G
+
P1
TB4
K2
RELAY
P2
T+
MN731
2-7
Signal Isolator Connection
If an isolated signal voltage is not available, an optional signal isolator may be installed. Refer to
BC145 Instruction Manual, MN1373.
Startup and Adjustments
Motor Type
The BC354 is designed for PWM rated motors. Use of higher voltage motors will result in reduction of
available maximum (MAX) speed (Trimpot Adjustment). Also, if motor is not PWM rated type, the actual
AC line amperage at full load should not exceed the motor’s DC nameplate rating.
Torque Requirements
When replacing an AC induction motor with a DC motor and speed control, consideration must be
given to the maximum torque requirements. The full load torque rating of the DC motor must be equal
to, or greater than, that of the AC motor being replaced.
Set Jumpers
The BC354 has selectable jumpers which must be set before the control can be used. See Figure 2-5
for jumper locations.
J1 - Motor Voltage Selection
Jumper J1 is factory set to 90V position for 90 Volt SCR rated motors (or 130 Volt PWM rated motors).
For 180 Volt SCR rated motors (or 260 Volt PWM rated motors), set jumper J1 to 180V position. See
Figure 2-13.
Note: If jumper J1 is set to T position, a tachometer must be connected to TB3. If a tachometer is not
used, jumper J1 must be in either 90V or 180V position. If jumper J1 is in T position, and a tachometer
is not used, the motor will accelerate to full speed and the main speed potentiometer will not control
speed.
Figure 2-13 Motor Voltage Selection
J1 Set for 90 Volt Motors
(Factory Setting)
J1 Set for 180 Volt Motors
J1 Set for Tachometer
Feedback
J2 - Motor Current Selection
Jumper J2 is factory set to 7.5A position for 7.5 Amp motors. For motors of lower amperage, set
jumper J2 to the corresponding position for the motor being used. See Tables 6-1 and Table A-1.
Table 2-4 Motor Current Selection
J2 Set for
7.5 Amp Motor
(Factory Setting)
J2
High Scale Current
Range
(Amps DC)
7.5
5.0
3.5
2.5
1.7
Low Scale Current
Range* (Amps DC)
0.8
0.5
0.4
0.3
0.2
Note: For low motor current range settings (0.8A, 0.5A, 0.4A, 0.3A, and 0.2A), it is necessary to modify
the Motor Current Selection circuit by removing resistor R35. See Appendix A.
2-8
MN731
J3 - Current Limit Mode Selection
The BC354 contains electronic current limiting which limits the maximum DC current to the motor,
(the current limit set point is established with the setting of the CL trimpot). Two modes of current limit
operation are provided.
TCL (Timed Current Limit)
In this mode the drive will turn off after being in current limit for a preset time. This time period is
adjustable with the TCL trimpot from 0.5 - 10 seconds and is factory set for approximately 5 seconds.
Note: The Overload LED will remain lighted until the control is reset.
Resetting the Control after TCL
To reset the control after it has gone into TCL, momentarily set the Start/Stop switch to START position
or disconnect and reconnect the AC line. If an On/Off AC Line Switch is installed, set it to OFF position
and then back to ON position. If the Start switch is jumpered (START and COM terminals connected)
the control must be restarted by disconnecting and reconnecting the AC line.
NTCL (Non-Timed Current Limit)
In this mode the drive will reach the preset current limit during overload and stay at that level until
a fuse blows or the drive is manually turned off. If non-timed CL operation is desired, move jumper
J3 from the factory set TCL position to the NTCL position. The NTCL position must be used when
operating in the Torque Mode. When jumper J3 is set to NTCL position, the control will not go into
STOP after it is in overload.
Note: The TCL trimpot will have no effect when Jumper J3 is in the NTCL position.
J1, J4 - Tachometer Feedback and DC Tachometer Voltage Selection
If a DC Tachometer is used, set J1, (Armature Voltage or Tachometer Feedback), to the ‘T’ position,
and set J4 to the tachometer Volts/1000 RPM position in accordance with the tachometer nameplate
value. (7V or 50V). See Figure 2-14.
Note: When using a tach-generator, the IR trimpot should be set fully counterclockwise.
Figure 2-14 DC Tachometer Voltage Selection
Jumper J1 Settings
J1 Set for
90 Volt Motors
(Factory Setting)
J1
J1 Set for
Tachometer Input
Jumper J4 Settings
J4 Set for 7V
J4 Set for 50V
per 1000RPM
per 1000RPM
Tachometer Input
Tachometer
Input
(Factory Setting)
J4
J4
7V 50V
7V 50V
The tachometer input is designed for 7 Volts/1000 RPM or 50 Volts/1000 RPM used with 1800 RPM
motors. If other than standard tachometer voltages or motor speeds are used, an external resistor,
(RT), must be installed in one leg of the tachometer.
1. Place J4 in the 7V position.
2. Calculate the value of RT as follows:
The value of RT (in Ω) can be calculated using the following formula:
RT = (1.46 X VT X S) - 19,000
VT is the tachometer voltage (in Volts per 1000 RPM)
S is the base speed of the motor (in RPM)
Example: Suppose you have a 20 Volt per 1000RPM tachometer with a 3600 RPM motor:
• RT = (1.46 X 20 X 3600) - 19000 = 86120Ω 1/2 Watt.
• Choose the closest 1/2W resistor value, which is 82000Ω (82kΩ) or 91000kΩ (91kΩ) 1/2 Watt.
• Readjustment of the MAX trimpot may be necessary to achieve the desired maximum output
voltage.
MN731
2-9
J5 - Run Relay Output Mode Selection
Jumper J5 is factory set to N.O. position for normally open relay output at TB3.
For normally closed relay output, set jumper J5 to N.C. position.
J6 - Stop Mode Selection
A switch with N.O. (Normally Open) or N.C. (Normally Closed) stop contacts can be selected for Stop
Mode. Jumper J6 is factory set to the N.O. position.
J7 - ENABLE (J7)
When connecting a switch to the dedicated Enable circuit Terminals EN1 and EN2 on TB3, Jumper 7
must be removed.
Startup
After the control has been mounted properly and electrical connections have been completed and
jumpers are correctly set, start the control as follows:
1. Verify the speed adjust potentiometer is set fully counterclockwise.
2. Apply AC power.
3. Observe the Power ON LED indicator is illuminated. If not on, refer to troubleshooting.
4. Verify correct direction of motor rotation.
Start the control. The motor shaft should begin to rotate as the potentiometer knob is turned
clockwise, or the analog speed reference signal is increased.
Verify the motor shaft is rotating in the desired ‘forward’ direction.
If the direction of rotation is incorrect, stop the control and disconnect AC power.
Switch the motor lead connections at the A+ and A- terminals.
If a tachometer is connected, the leads may also need to be switched for correct signal polarity.
If the CL LED is on, refer to troubleshooting.
WARNING: If possible, do not adjust trim pots with the main power applied. Electrical shock can cause serious or
fatal injury. If adjustments are made with the main power applied, an insulated adjustment tool must
be used to prevent shock hazard and safety glasses must be worn.
Trimpot Adjustments
The BC254/BC254-FSR contains trimpots, which are factory set for most applications. Figure 2-2
illustrates the location of the trimpots and their approximate calibrated positions. Some applications
may require readjustment of the trimpots to tailor the control for a specific requirement.
Readjust trimpots as needed.
Acceleration (ACCEL)
The ACCEL trimpot sets the amount of time for the motor to accelerate from minimum to maximum
speed. The acceleration circuit operates when starting the control with the main speed potentiometer
rotated clockwise or when rapidly rotating the main speed potentiometer in the clockwise direction.
The trimpot is factory set to one (1) second. To increase acceleration time, rotate the trimpot
clockwise. If more rapid acceleration is desired, rotate the trimpot counterclockwise.
Note: Rapid ACCEL setting may cause the current limit circuit to activate which will extend the
acceleration time.
Deceleration (DECEL)
The DECEL trimpot sets the amount of time for the motor to decelerate from maximum speed to
minimum speed. The trimpot is factory set to one (1) second. To decrease deceleration time, rotate the
trimpot counterclockwise. To increase deceleration time, rotate the trimpot clockwise.
2-10
MN731
Notes:
1. On high inertial loads, a rapid DECEL setting may cause the motor to coast to a stop slower than
the DECEL setting. To increase deceleration time, rotate DECEL trimpot clockwise. 50% rotation
represents approximately five (5) seconds and full rotation is approximately ten (10) seconds.
2. The Deceleration circuit works when rotating the Main Speed Potentiometer in the CCW direction
or when opening the P3 lead of the Main Speed Potentiometer (with an Enable Switch). It does not
operate when power is removed.
Maximum Speed (MAX)
The MAX trimpot is used to set the maximum voltage of the drive. This sets the maximum speed of the
motor. The MAX trimpot is factory set to 100% of base speed.
Adjust the MAX trimpot as follows:
1. Rotate Main Potentiometer to maximum speed position (full clockwise).
2. Adjust MAX trimpot setting to desired setting of motor speed.
Minimum Speed (MIN)
The MIN trimpot is used to set the minimum voltage of the drive. This sets the minimum speed of the
motor. The MIN Trimpot is factory set to 0% of base speed.
Adjust the MIN trimpot as follows:
1. Rotate Main Potentiometer to minimum speed position (full counterclockwise).
2. Increase setting of MIN trimpot so that motor runs at desired minimum speed.
Jog Speed (JOG)
This trimpot is operational only when the optional RUN-STOP-JOG Switch (BC157) is installed. The
JOG trimpot is factory set for 15% of base speed. With the RUN-STOP-JOG switch in the JOG position
the JOG trimpot can be adjusted to the desired JOG speed. To increase JOG speed, rotate the trimpot
clockwise. To decrease JOG speed, rotate the trimpot counterclockwise.
Current Limit (CL)
This trimpot is used to set the maximum amount of DC current that the motor can draw. The CL
trimpot is factory set to 150% of the J2 range setting. The current limit set point is determined by
the setting of jumper J2 and the setting of the CL trimpot. To increase the current limit value, rotate
the trimpot clockwise. To decrease the current limit value, rotate the trimpot counterclockwise. Some
applications require a lower torque limiting value so as not to damage the process material or the
drive train.
Caution: Adjusting the CL above 150% of motor rating can cause overheating and demagnetization of some PM
motors. Consult motor manufacturer.
Timed Current Limit (TCL)
This function provides motor overload protection. Jumper J3 must be in the TCL position, in order for
Timed Current Limit to be operational. This trimpot determines the approximate amount of time the
drive will stay in Current Limit before trip out. The trimpot has an adjustment range of .5 - 10 seconds
and is factory set for five (5) seconds. The trimpot can be reset according to the desired trip time.
Rotating the trimpot clockwise, increases the trip time.
To reset the control after a current limit time out, momentarily set the START/STOP switch to the
START position or cycle AC supply power OFF - ON.
Note: Non-Timed Current Limit - When jumper J3 is set to NTCL position and an overload condition
exists, the control will remain in current limit.
MN731
2-11
IR Compensation (IR)
The IR comp circuit is used to stabilize motor speed under varying loads. The IR trimpot is factory set
to 4 Volts for 90 Volt DC motors and 8 Volts for 108 Volt DC motors.
Note: If control is in Tach Feedback mode, the IR trimpot should be set to minimum - ccw.
Readjust the IR trimpot as follows:
1. Run the motor at approximately 30-50% of rated speed under no load and measure actual speed.
2. Load the motor in accordance with the application requirements. Rotate IR trimpot so that the
loaded speed is the same as the unloaded speed measured in step 1.
Control is now compensated so that minimal speed change will occur over a wide range of motor
load.
Note: Too much IR Camp will cause unstable (oscillatory) operation.
Troubleshooting
The control has LEDs to display the control’s operational status.
A. Power On
This lamp indicates AC power is applied to the control.
Note: When removing power to the control, the ON LED will remain illuminated for a few seconds until
the bus voltage discharges.
B. STOP (STOP)
The STOP LED will illuminate yellow when the Start/Stop switch is set to the STOP position. When
the AC line is applied, this LED will also be illuminated until the Start/Stop switch is momentarily
set to the START/STOP position.
C. OVERLOAD (OL)
The OL LED will illuminate red when the control goes into current limit, indicating that the current
limit set point has been reached (set by the CL trimpot and the position of jumper J4). This LED will
remain illuminated if the control times out in TCL (Jumper J8 set to the TCL position).
The control can be reset by either setting the Start/Stop Switch to the STOP position and then
momentarily to the START position or by disconnecting and reconnecting the AC line. If the
overload condition still exists when the control is restarted or AC line reapplied, the OL LED
will illuminate again. If the OL LED remains illuminated during normal control operation, a fault
condition may exist. See Table 2-5
2-12
MN731
Table 2-5 Troubleshooting Guide
Indication / Symptom
Possible Soloutions
Motor is not running or, STOP LED indicator is
illuminated.
START-STOP Switch is in the STOP position. If so, move the
START-STOP Switch to the START position.
The Main Speed Potentiometer is set to zero speed. Set the
Main Speed Potentiometer for the desired speed.
The Main Speed Potentiometer, signal input, or motor
connections are open. Verify Main Speed Potentiometer, signal
input, or motor connections.
Motor runs then stops after a short time or, the Drive
Trips due to overload (TCL Fault).
The drive must be manually restarted by disconnecting and
reconnecting the AC power. Reduce load.
Line fuse blows or circuit breaker trips.
The line fuse or circuit breaker installed is the incorrect rating.
See Appendix A for the correct line fuse or circuit breaker
rating.
OL LED indicator is illuminated.
Motor is overloaded. Check motor amps with DC ammeter
in series with armature. (If motor is shunt type, field may be
open or not receiving proper voltage.)
Check motor for shorts or grounds. Motor may be defective.
Check position of CL trimpot. The CL
may be set too low.
Rapid Acceleration change will cause the LED to illuminate.
Verify potentiometer setting.
Power ON LED indicator is not illuminated.
Check to see if the AC Line connections have been made.
Check AC Line fuse.
Notes:
1. For any other problems, consult the factory representative.
2. In some applications, especially those requiring the motor to cycle on and off or from one speed to
another or from stop to high speeds, the OL LED may blink, indicating a transient overload.
This may be a normal condition for the application.
MN731
2-13
2-14
MN731
Appendix A
For low motor current range settings, (0.8A, 0.5A, OAA, 0.3A, and 0.2A), it is necessary to modify the
motor current selection circuit by removing resistor R35.
Turn off all power.
Carefully cut the leads of R35 as shown below in Figure A-1.
After removing R35, set J2, to the motor nameplate current rating. Table See Table A-1.
Figure A-1 Removing Resistor R35
TO REMOVE RESISTOR R35
CUT THE LEADS HERE
R35
(FRONT, LOWER VIEW OF PCB)
Table A-1 Current Limit Settings with .05 ohm Plug-in Horsepower Resistor Installed
J2 Setting
Amps DC)
SCR Rated Motor Power HP, (kW)
PWM Rated Motor Power HP, (kW)
90 VDC
180 VDC
130 VDC
220 VDC
7.5
3/4, (0.5)
1-1/2, (1)
1, (0.75)
2, (1.5)
5.0
1/2, (0.37)
1, (0.75)
3/4, (0.5)
1-1/2, (1)
3.5
1/3, (0.25)
3/4, (0.5)
1/2, (0.37)
1, (0.75)
2.5
1/4, (0.18)
1/2, (0.37)
1/3, 0.25)
3/4, (0.5)
1.7
1/6, (0.1)
1/3, (0.25)
1/4, (0.18)
1/2, (0.37)
0.8*
1/12, (0.06)
1/6, (0.1)
1/8, (0.09)
1/4, (0.18)
0.5*
1/20, (0.04)
1/10, (0.08)
1/15, (0.05)
1/6, (0.1)
0.4*
1/25, (0.03)
1/12, (0.06)
1/20, (0.04)
1/8, (0.09)
0.3*
1/30, (0.02)
1/15, (0.05)
1/25, (0.03)
1/10, (0.08)
0.2*
1/50, (0.01)
1/25, (0.03)
1/30, (0.02)
1/20, (0.04)
* Current values with R35 removed. See Application Note and Figure A-1.
MN731
A-1
A-2
MN731
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MN731-0615
Baldor Electric Company
P.O. Box 2400, Fort Smith, AR 72902-2400 U.S.A., Ph: (1) 479.646.4711, Fax (1) 479.648.5792, International Fax (1) 479.648.5895
www.baldor.com
© Baldor Electric Company
MN731
All Rights Reserved. Printed in USA.
(A40281) - Rev. E 6/15
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