MODEL P48 - 1/16 DIN PROCESS CONTROLLER

BULLETIN NO. P48-A
DRAWING NO. LP0464
REVISED 11/98
MODEL P48 - 1/16 DIN PROCESS CONTROLLER
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PID CONTROL WITH REDUCED OVERSHOOT
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ACCEPTS 0 to 10 VDC or 0/4 to 20 mA DC INPUTS
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OPTIONAL TWO LINEAR DC OUTPUTS (0 to 10 V, 0/4 to 20 mA)
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OPTIONAL DUAL ALARM OUTPUTS
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OPTIONAL REMOTE SETPOINT INPUT (0/4 to 20 mA)
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OPTIONAL RS-485 SERIAL COMMUNICATIONS
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SECOND SETPOINT SETTING
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SETPOINT RAMPING FOR PROCESS STARTUP
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PROGRAMMABLE USER INPUT (Digital) FOR ADDED FLEXIBILITY
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PARAMETER SECURITY VIA PROGRAMMABLE LOCKOUTS
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MANUAL/AUTOMATIC CONTROL MODES
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ON DEMAND AUTO-TUNING OF PID CONTROL SETTINGS
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STATUS INDICATORS FOR OUTPUTS AND CONTROL MODES
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DUAL LED DISPLAYS FOR SIMULTANEOUS INDICATION OF
PROCESS AND SETPOINT
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PC SOFTWARE AVAILABLE FOR CONTROLLER
CONFIGURATION
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NEMA 4X/IP65 BEZEL
AND
Optional alarm(s) can be configured to activate according to a variety of
actions (Absolute HI or LO, Deviation HI or LO, and Band IN or OUT) with
adjustable hysteresis. A standby feature suppresses the alarm during power-up
until the process stabilizes outside the alarm region. The second alarm can be
configured as a secondary PID output (heat/cool applications).
Optional Main Linear DC output (10 V or 20 mA) can be used for control or
process re-transmission purposes. Programmable output update time reduces
valve or actuator activity. The output range can be scaled independent of the
input range.
Optional Second Linear DC output (10 V or 20 mA) provides an independent
process re-transmission, while the main Linear DC output is being used for
control. The output range can be scaled independent of the input range.
Optional Remote Setpoint input (0/4 to 20 mA) allows for ratio control for
mixing and blending; allows for cascade control loops; and allows for remotely
driven setpoint signal from computers or other similar equipment.
Straightforward end point scaling with independent filtering and local/remote
transfer option expand the controller’s flexibility.
The optional RS-485 serial communication interface provides two-way
communication between a P48 and other compatible equipment such as a
printer, PLC, HMI, or a host computer. In multipoint applications (up to
thirty-two), the address number of each P48 on the line can be programmed
separately from 0 to 99. Data from the P48 can be interrogated or changed, and
alarm output(s) may be reset by sending the proper command code via serial
communications. PC software, SFT48, allows for easy configuration of
controller parameters. These settings can be saved to disk for later use or used
for multi-controller down loading. On-line help is provided within the software.
DESCRIPTION
The P48 Controller accepts either a 0 to 10 VDC or a 0/4 to 20 mA DC
signal, precisely displays the input process signal according to the
programmable scaling points, and provides an accurate output control signal
(time proportional or linear DC) to maintain the process at the desired control
point. The controller’s comprehensive yet simple programming allows it to
meet a wide variety of application requirements.
In the PID control mode the controller operates with on-demand auto-tune,
which will establish the tuning constants. The PID tuning constants may be finetuned by the operator at any time and then locked out from further modification.
The controller employs a unique overshoot suppression feature, which allows
the quickest response without excessive overshoot. The unit can be transferred
to operate in the manual mode, providing the operator with direct control of the
output. The controller may also operate in the ON/OFF control mode with
adjustable hysteresis. A second setpoint is available to allow quick selection of
a different setpoint setting.
Dual 4-digit displays allow viewing of the process and setpoint
simultaneously. Front panel indicators inform the operator of the controller and
output status. On some models, the main control output and the alarm outputs
are field replaceable.
CAUTION: Read complete
instructions prior to installation
and operation of the unit.
UL Recognized Component
File # E156876 (M)
CAUTION: Risk of electric shock.
DIMENSIONS “In inches (mm)”
PANEL CUT-OUT
759
The unit is constructed of a lightweight, high impact plastic case with a tinted
front panel. The front panel meets NEMA 4X/IP65 specifications when
properly installed. Multiple units can be stacked horizontally or vertically.
Modern surface-mount technology, extensive testing, plus high immunity to
noise interference makes the controller extremely reliable in industrial
environments.
8. CONTROL AND ALARM OUTPUTS:
Relay outputs with Form A contacts:
Contact Rating: 3 A @ 250 VAC or 30 VDC (resistive load)
1/10 HP @ 120 VAC (inductive load)
Life Expectancy: 100,000 cycles at max. load rating.
(Decreasing load and/or increasing cycle time, increases life
expectancy.)
9. MAIN CONTROL:
Control: PID or ON/OFF
Output: Time proportioning or Linear DC
Cycle time: Programmable
Auto-tune: When selected, sets proportional band, integral time, and
derivative time values.
10. ALARMS: 1 or 2 alarms (optional)
Modes:
Absolute high acting
Absolute low acting
Deviation high acting
Deviation low acting
Inside band acting
Outside band acting
SAFETY SUMMARY
All safety related regulations, local codes and instructions that appear in the
manual or on equipment must be observed to ensure personal safety and to
prevent damage to either the instrument or equipment connected to it. If
equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
Do not use the P48 to directly command motors, valves, or other actuators
not equipped with safeguards. To do so can be potentially harmful to persons or
equipment in the event of a fault to the controller. An independent and
redundant process limit indicator with alarm outputs is strongly recommended.
SPECIFICATIONS
Reset Action: Programmable; automatic or latched
Standby Mode: Programmable; enable or disable
Hysteresis: Programmable
Annunciator: LED backlight for “A1”, “A2”
11. SECONDARY OUTPUT: Software selectable (overrides alarm 2)
Control: PID or ON/OFF
Output: Time Proportioning
Cycle time: Programmable
Proportional Gain Adjust: Programmable
Deadband /Overlap: Programmable
12. MAIN AND SECOND LINEAR DC OUTPUT: (optional)
Main: Control or re-transmission, programmable update rate from 0.1 sec to
250 sec
Second: Re-transmission only, fixed update rate of 0.1 sec
1. DISPLAY: Dual 4-digit
Upper Process Display: 0.4” (10.2 mm) high red LED
Lower Auxiliary Display: 0.3” (7.6 mm) high green LED
Display Messages:
“OLOL”
“ULUL”
“SENS”
“...”
“-..”
-
Appears
Appears
Appears
Appears
Appears
when
when
when
when
when
measurement exceeds + input range.
measurement exceeds - input range.
measurement exceeds controller limits.
display values exceed + display range.
display values exceed - display range.
LED Status Annunciators:
%P
MN
DV
O1
A1
A2
- Lower auxiliary display shows power output in (%).
- Flashing: Controller is in manual mode.
On: Local Setpoint (Remote Setpoint option)
Off: Remote Setpoint
- Lower auxiliary display shows deviation (error) from
setpoint.
- Main control output is active.
- Alarm #1 is active (for A1 option).
- Alarm #2 is active OR
- Secondary output (02) is active.
2. POWER:
AC Versions: 85 VAC min. to 250 VAC max., 50 to 60 Hz, 8 VA max.
DC Versions:
DC Power: 18 to 36 VDC; 7W
AC Power: 24 VAC ±10%; 50 to 60 Hz, 9 VA
3. CONTROLS: Four front panel push buttons for modification and setup of
controller functions and one external user input for parameter lockout or
other functions.
4. MEMORY: Nonvolatile E2 PROM retains all programmable parameters and
values.
5. SIGNAL INPUT:
INPUT
RANGE
10 VDC
(-1 to 11)
20 mA DC
(-2 to 22)
0.30% of
reading
+0.03 V
0.30% of
reading
+0.04 mA
1 M ohm
300 V
10 mV
10 ohm
100 mA
10 µA
* After 20 minutes warm-up. The controller’s accuracy is specified two
ways: Accuracy over an 18 to 28°C range at 10 to 75% relative humidity
environment; and accuracy over a 0 to 50°C range at 0 to 85% relative
humidity (non-condensing) environment. Accuracy over the wide sensor
range reflects the coefficient of the internal circuitry.
6. MAIN SIGNAL INPUT:
Sample Period: 100 msec
Response Time: Less than 300 msec typ., 400 msec max. (to within 99% of
final value w/step input; typically, response is limited to response time of
sensor)
Normal Mode Rejection: 40 dB @ 50/60 Hz (improves with increased
digital filtering.)
Common Mode Rejection: Greater than 120 dB, DC to 60 Hz
7. USER INPUT: Internally pulled up to +5 VDC (1 MW).
VIN MAX = 5.25 VDC, VIL = 0.85 V max., VIH = 3.65 V min.,
IOFF = 1µA max.
Response Time: 120 msec max.
Functions:
Program Lock
Integral Action Lock
Auto/Manual Mode Select
Reset Alarms
Local/Remote Setpoint Select
ACCURACY *
(18 to 28°C)
ACCURACY *
(0 to 50°C)
COMPLIANCE
RESOLUTION
0 to 10 V
0.10% of FS
+ 1/2 LSD
0.30% of FS
+ 1/2 LSD
10k ohm min.
1/3500
0 to 20 mA
0.10% of FS
+ 1/2 LSD
0.30% of FS
+ 1/2 LSD
500 ohm max.
1/3500
4 to 20 mA
0.10% of FS
+ 1/2 LSD
0.30% of FS
+ 1/2 LSD
500 ohm max.
1/2800
* After 20 minutes warm-up. Output accuracy is specified in two ways:
Accuracy over an 18 to 28°C range at 10 to 75% RH environment; and
accuracy over a 0 to 50°C range at 0 to 85% RH (non-condensing)
environment. Accuracy over the wide sensor range reflects the coeffecient of
the internal circuitry.
** Outputs are independently jumper selectable for either 10 V or 20 mA. The
output range may be field calibrated to yield approximately 10% overrange
and a small underrange (negative) signal.
13. REMOTE SETPOINT INPUT: (optional)
Input type: 0/4 to 20 mA
Input Resistance: 10W
Overrange: -5% to 105%
Overload: 100 mA (continuous)
Scale Range: -999 to 9999
Resolution: 1 part in 10,000.
Accuracy:
At 25° C: ±(0.1 % of full scale +½ LSD)
Over 0 to 50°C range: ±(0.2% of full scale +½ LSD)
Reading Rate: 10/sec.
Setpoint Filtering: Programmable Digital
Setpoint Ramping: Programmable, 1 to 9999 degrees/minute.
14. SERIAL COMMUNICATIONS: (optional)
Type: RS485 multipoint, balanced interface
Baud Rate: 300 to 9600
Data Format: 7 data bits, odd, even or no parity, 1 stop bit
Node Address: 0-99, max of 32 units per line
Transmit Delay: 2-100 msec or 100-200 msec
Data Encoding: ASCII
Isolation w.r.t Main Input Common: 500 Vrms for 1 min. (50 V working)
Not isolated w.r.t. Remote Setpoint or Analog Output common
Note: RS485 and the Analog Output commons are not internally isolated
within the controller. The terminating equipment of these outputs must not
share the same common (ie. earth ground).
MAX
ACCURACY * ACCURACY *
IMPEDANCE CONTINUOUS RESOLUTION
(18 to 28°C)
(0 to 50°C)
OVERLOAD
0.10% of
reading
+0.02 V
0.10% of
reading
+0.03 mA
OUTPUT **
RANGE
Setpoint Ramp Enable
Setpoint 1/Setpoint 2 Select
Serial block point
760
15. ENVIRONMENTAL CONDITIONS:
Operating Range: 0 to 50°C
Storage Range: -40 to 80°C
Span Drift (max.): 130 ppm/°C, main input
Zero Drift (max.): 1µV/°C, main input
Operating and Storage Humidity:
85% max. relative humidity (non-condensing) from 0°C to 50°C.
Altitude: Up to 2000 meters
16. ISOLATION BREAKDOWN RATINGS:
AC line with respect to all inputs and outputs: 2000 Volts
Main input with respect to Analog Output and
Remote Setpoint Input: 500 V for 60 sec. min.
All other inputs and outputs with respect to relay contacts: 2000 VAC
17. CERTIFICATIONS AND COMPLIANCES:
UL Recognized Component: File #E156876 (M)
Recognized to U.S. and Canadian requirements under the Component
Recognition Program of Underwriters Laboratories, Inc.
FRONT PANEL FEATURES
In the normal operating mode, the unit displays the process value in the upper
display. One of the following parameters can be viewed in the lower display:
- Setpoint
- % Power Output
- Process Deviation
- Blank Display
The user scrolls through these parameters by pressing the D button. If
enabled, the control setpoint or power output (manual mode only) can be
directly modified in this mode.
In the normal operating mode, parameters are selected by use of the P button
and modified by use of the UP and DOWN buttons. Parameters are then entered
by the P button, which advances the user to the next parameter. Pressing the D
button immediately returns the controller to the normal operating mode without
changing the currently selected parameter.
HARDWARE FEATURES
ELECTROMAGNETIC COMPATIBILITY
A fast 100 msec input sampling rate provides quick controller response to a
process disturbance, thus providing excellent process control. Measurement
accuracy of 0.1% or better, provides close process control conforming to the
desired control setpoint value.
Low-drift, highly stable circuitry ensures years of reliable and accurate
process control. The recommended two year re-calibration interval is easily
accomplished via the programming menu.
Immunity to EN 50082-2
electrostatic discharge
EN 61000-4-2 level 2; 4 Kv contact
level 3; 8 Kv air
electromagnetic RF fields
EN 61000-4-3 level 3; 10 V/m 1
80 MHz - 1 GHz
fast transients (burst)
EN 61000-4-4 level 4; 2 Kv I/O
level 3; 2 Kv power
RF conducted interference
EN 61000-4-6 level 3; 10 V/rms 2
150 KHz - 80 MHz
simulation of cordless telephones ENV50204 level 3; 10 V/m
900 MHz ± 5 MHz
200 Hz, 50% duty cycle
Emissions to EN 50081-2
RF interference
EN 55011 enclosure class A
power mains class A
REMOTE SETPOINT INPUT
The remote setpoint input facilitates the use of a remote signal to drive the
controller’s setpoint. The remote signal can be scaled independent to that of the
controller’s range. The controller’s response to local/remote setpoint transfers
can be programmed. Also, the remote signal is filtered by use of an adaptive
filter. With this filter, relatively large filtering time constants can be used
without suffering from long settling times. The time constant and filter disable
band are programmable. Additionally, the remote signal can also be velocity
limited (or ramped) to slow the controller’s response to changes in setpoint.
This results in a steady control response with no overshoot.
LINEAR DC ANALOG OUTPUTS
Notes:
1. No loss of performance during EMI disturbance at 10 V/m.
Unit is panel mounted in a metal enclosure (Buckeye SM7013-0 or
equivalent) that provides at least 20 dB shielding effectiveness. Metal
panel is connected to earth ground.
I/O cables routed in metal conduit connected to earth ground.
Install power line filter, RLC #LFIL0000 or equivalent.
2. Permissible loss of performance during EMI disturbance at 10 Vrms:
Process signal deviation less than 3% of full scale.
Analog output deviation less than 1% of full scale.
RSP signal deviation less than 0.5% of full scale.
For operation without loss of performance:
Install power line filter, RLC#LFIL0000 or equivalent.
OR
Install 2 ferrite cores, RLC#FCOR0000 or equivalent, to AC lines at
unit for frequencies above 5 MHz.
I/O cables routed in metal conduit connected to earth ground.
The Main Linear DC output has independent scaling, programmable output
update time and filter (damping) time. These parameters permit flexibility in
process configuration. The output can be set for 0 to 10V, 0 to 20 mA or 4 to 20
mA ranges and can be configured for control or for re-transmission of input or
setpoint values.
A Second Linear DC output is dedicated for the re-transmission of the
process input signal. The output can be scaled and converted independent of the
input signal and Main Linear DC output. This output is isolated from the input.
SETPOINT FEATURES
The controller setpoint can be protected from out of range values by
programming the setpoint range limit values. Additionally, safeguards from
inadvertent data entry can be programmed.
A second setpoint can be selected by the user input and/or through the front
panel.
The setpoint ramp feature can be used to control the setpoint value at start-up
or any time a setpoint change is made, at a user programmable rate. This feature
reduces shock to the process and helps to minimize overshoot.
Refer to the EMC Installation Guidelines section of the manual for additional
information.
18. CONNECTION: Wire clamping screw terminals
19. CONSTRUCTION: Black plastic alloy case and collar style panel latch.
Panel latch can be installed for vertical or horizontal instrument stacking.
One piece tinted plastic bezel. Bezel assembly with circuit boards can be
removed from the case to change the output board without removing the case
from the panel or disconnecting wiring. Unit meets NEMA 4X/IP65
requirements for indoor use, when properly installed. Installation Category
II, Pollution Degree 2.
20. WEIGHT: 0.38 lbs (0.17 kgs)
INPUT FEATURES
A programmable input filter can be used to stabilize readings from a process
with varying or oscillating process characteristics, helping to provide better
control.
The programmable user input can be used to control a variety of functions,
such as auto/manual transfer of the controller, reset alarm output(s), etc.
OUTPUT FEATURES
Programmable output power limits provide protection for processes where
excessive power can cause damage. Programmable output cycle time, output
hysteresis, and dampening can reduce output activity without degrading control
accuracy. The main outputs can operate in PID, ON/OFF, or manual control
modes.
BASIC OPERATION
The P48 controls a process by receiving a linear DC signal representing the
process value, then calculating a control output power value by use of a
modified PID control algorithm. The unit controls the system with the new
output power value to keep the process at setpoint. The PID control algorithm
incorporates features which provide for high control accuracy and low
overshoot from process disturbances.
CONTROL AND ALARM OUTPUTS
In addition to the Linear DC output, there are up to three relay outputs
available. Relay outputs can switch user applied AC or DC voltages for control
or alarm purposes.
761
AUTO-TUNE
CONFIGURATION PARAMETER MODE
The P48 has an auto-tune feature which, on demand, automatically
determines the PID control parameters for a particular process. After
completion of auto-tune, the PID parameters are automatically optimized for
that process and loaded into non-volatile memory. The operator may view and
modify the parameters as desired.
Auto-tune may be invoked either at start-up or at setpoint, depending on the
process requirements. An auto-tune programmable dampening factor produces
various levels of process control and response characteristics.
The Configuration Parameter Mode allows the operator to set-up the basic
requirements of the controller. It is divided into sections which group together
related programming steps, such as inputs, outputs, alarms, etc. Upon
completion of each section, the program returns to the Configuration Access
Point allowing the user to return to the Normal Display Mode.
Configuration 1, Inputs (1-IN)
“TYPE”
“dCPt”
“rnd”
“FLtr”
“dSP1”
“InP1”
“dSP2”
“InP2”
“SPLO”
“SPHI”
“SPrP”
“InPt”
RS-485 SERIAL COMMUNICATIONS
The RS-485 communications option allows the connection of up to 32
devices on a single pair of wires with a distance of up to 4,000 feet and a
maximum baud rate of 9600. Since the same pair of wires are used for both
transmit and receive, only one way communication is possible at any given
time. The controller has a programmable response time to allow the host device
adequate time to release the communication line for a transmission.
Selected parameters from the P48 can be interrogated or changed, and alarm
output(s) may be reset by sending the proper command code via serial
communications. It is also possible to invoke Auto-tune through the serial port.
Serial communications used with SFT48 software allows for easy controller
parameter configuration by computer.
“CYCt”
“OPAC”
“OPLO”
“OPHI”
“OPdP”
“CHYS”
“tcod”
“AntP”
“ANAS”
“ANut”
“ANLO”
“ANHI”
The P48 is available with dual time proportional outputs. The dual outputs
can be used for level or heat/cool applications. The A2 output can be configured
for Secondary (cool) control. This allows for dual PID control or ON/OFF
control with unbalanced hysteresis.
CONTROLLER PROGRAMMING
“SP”
“OP”
“dEv”
“bdSP”
“CodE”
“PId”
“AL”
“ALrS”
“SPSL”
“trnF”
“tUNE”
UNPROTECTED PARAMETER MODE *
“Act1”
“rSt1”
“Stb1”
“AL-1”
“Act2”
“rSt2”
“Stb2”
“AL-2”
“AHYS”
Enter setpoint
Enter output power
Enter proportional band
Enter integral time
Enter derivative time
Enter value for alarm #1
Enter value for alarm #2
Select configuration access point
Return to normal display mode
“CYC2”
“GAN2”
“db-2”
“bAUd”
“PArb”
“Add”
“Abr”
“PoPt”
Enter proportional band
Enter integral time
Enter derivative time
Enter value for alarm #1
Enter value for alarm #2
Enter value to access unprotected parameters and
configuration parameters
Enter time proportioning cycle time
Select output control action
Enter output power low limit
Enter output power high limit
Enter output control dampening
Enter ON/OFF control hysteresis
Select auto-tuning dampening
Main Linear DC analog output range
Main Linear DC analog output source
Main Linear DC analog output update time
Main Linear DC analog output scaling low
Main Linear DC analog output scaling high
-
Select setpoint access level
Select power access level
Enable deviation display
Enable blank display
Enter parameter access code
Select PID access level
Select alarm access level
Enable alarm reset access
Enable local/remote selection
Enable auto/manual mode selection
Enable auto-tune invocation
-
Select operation mode of alarm #1, or select main output
Select reset mode of alarm #1
Enable activation delay of alarm #1
Enter value for alarm #1
Select operation mode of alarm #2, or select second output
Select reset mode of alarm #2
Enable activation delay of alarm #2
Enter value for alarm #2
Enter hysteresis value for both alarms
- Enter time proportioning cycle time
- Enter relative gain
- Enter deadband or overlap
-
Select baud rate
Select parity bit
Enter address
Select abbreviated or full transmission
Select print options
Configuration 7, Remote Setpoint Input (7-N2) *
“dSP1”
“INP1”
“dSP2”
“INP2”
“FLtr”
“bAnd”
“trnF”
HIDDEN FUNCTION MODE *
The Hidden Function Mode is accessible from the Normal Display Mode.
The functions in this mode may be locked-out individually in Configuration 3
parameter (lock-out section).
-
-
Configuration 6, Serial Communications (6-SC) *
The Protected Parameters Mode is enabled when program disable is active.
This mode prevents access to the configuration modes without the proper access
code number. Only the parameters that are enabled in the Configuration 3
parameter (lock-out section) can be accessed.
“SPSL”
“trnF”
“tUNE”
“ALrS”
Enter setpoint lower limit
Enter setpoint higher limit
Enter setpoint ramp rate
Select user input function
Configuration 5, Second Output (5-O2) *
PROTECTED PARAMETERS MODE *
-
-
Configuration 4, Alarms (4-AL) *
The Unprotected Parameter Mode is accessible from the Normal Display
mode when program disable is inactive or when the proper access code number
from the Protected Parameter Mode is entered. The Configuration Parameter
Modes can be accessed only from this mode.
“ProP”
“Intt”
“dErt”
“AL-1”
“AL-2”
“CodE”
- Scale main input
Configuration 3, Parameter Lock-Outs (3-LC) *
Front Panel Program Disable allows all of the controller’s set-ups to be
locked-out from further operator intervention after the initial set-up.
The following four programming modes allow the controller to adapt to any
required user-interface level:
Unprotected Parameter Mode
Protected Parameter Mode
Hidden Function Mode
Configuration Parameter Mode
-
Select input signal type
Select scaled display decimal point position
Enter rounding increment and trailing zeros for scaled display
Select level of input filtering
Configuration 2, Outputs (2-OP) *
DUAL TIME PROPORTIONAL SYSTEMS
“SP”
“OP”
“ProP”
“Intt”
“dErt”
“AL-1”
“AL-2”
“CNFP”
“End”
-
-
Enter remote setpoint display scaling value #1
Enter remote setpoint process scaling value #1
Enter remote setpoint display scaling value #2
Enter remote setpoint process scaling value #2
Enter remote setpoint filter time constant
Enter remote setpoint filter disable band
Select Local/Remote setpoint transfer response
Configuration 8, Second Linear DC Analog Output (8-A2)*
“A2tP”
“A2LO”
“A2HI”
Select local (SP1 or SP2) or remote setpoint
Transfer between automatic (PID) control and manual control
Invoke/cancel PID Auto-tune
Reset latched alarms
- Second linear DC analog range
- Second linear DC analog scaling low
- Second linear DC analog scaling high
Configuration 9, Factory Service Operations (9-FS)
“Code 48”
“Code 66”
- Calibrate Instrument
- Reset parameters to factory setting
* These parameters may not appear due to option configuration or other
programming.
762
MULTIPLE UNIT STACKING
APPLICATION
The P48 is designed for close spacing of multiple units. Units can be
stacked either horizontally or vertically. For vertical stacking, install the panel
latch with the screws to the sides of the unit. For horizontal stacking, the panel
latch screws should be at the top and bottom of the unit. The minimum
spacing from center line to center line of units is 1.96” (49.8 mm). This
spacing is the same for vertical or horizontal stacking.
WATER PROCESSING APPLICATION
A city water company needs to maintain a steady flow of water for their
customer needs. They have an existing 0 to 10 VDC flow transmitter to
measure the water flow. They need to control the water flow, have a high
and low alarm, and keep a recorded chart of the flow for later reference. The
Main Linear DC output of the P48 can be used to control the position of
water output values per the desired flow setpoint value. The P48 relay
outputs can be programmed to give a high flow alarm and a low flow alarm.
With the Second Linear DC output model, the flow measurement to the P48
can be converted from 0-10 V to 4-20 mA and retransmitted to a 4-20 mA
chart recorder.
Note: When stacking units, provide adequate panel ventilation to ensure that
the maximum operating temperature range is not exceeded.
ALARM
POWER
+
CHART
RECORDER
HIGH
ALARM
PANEL LATCH INSTALLED FOR
VERTICAL UNIT STACKING
LOW
ALARM
PANEL LATCH INSTALLED FOR
HORIZONTAL UNIT STACKING
PANEL CUT-OUT SPACING FOR MULTIPLE UNIT STACKING.
HORIZONTAL ARRANGEMENT SHOWN.
UNIT POWER
CONTROL
VALVE
FLOW
SENSOR
WATER FLOW
(Terminal assignments are model number dependent.)
ORDERING INFORMATION
Options and Output Boards are factory configured per the part number specified. Part numbers without replacement output
boards listed must be returned to the factory for output board replacement.
All part numbers are software version V 4.0 or greater and are equipped with a second setpoint.
DEDICATED MAIN CONTROL DEDICATED
MAIN CONTROL
O1 or
ALARM 1
O1 OUTPUT
A1(ALARM 1)* A1 OUTPUT
A2 (ALARM 2)
OR O2
(SECONDARY)*
REMOTE
SETPOINT
INPUT
RS485
MAIN
ANALOG
OUTPUT**
SECOND
ANALOG
OUTPUT**
YES
Relay
Relay
YES
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
Relay
YES
YES
PART NUMBERS
REPLACEMENT
ALARM OUTPUT
BOARD
18-36 VDC/24 VAC 85 to 250 VAC
NA
P4800011
P4800001
RBD48100
P4810010
P4810000
RBD48100
P4810012
P4810002
YES
NA
P4810111
P4810101
YES
NA
P4810115
P4810105
YES
NA
P4810117
P4810107
NA
P481011A
P481010A
RBD48111
P4811110
P4811100
RBD48111
P4811112
P4811102
YES
YES
YES
* These part numbers have a single output programmable as either Control (PID) or as an Alarm.
** These part numbers are jumper and program selectable for either a current or a voltage Linear DC output.
Option Boards are installed at the factory for the appropriate models. These boards are only needed for field replacement.
ACCESSORIES
MODEL NO.
SFT48
DESCRIPTION
PART NUMBERS
PC Configuration Software for Windows 3.x and 95 (3.5” disk) (for RS-485 models)
763
SFT48

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