User`s Manual Series L

Series L
User’s Manual
Series L - Temperature Limit
TOTAL
CUSTOMER
CUS
ER
SATISF
TISFACTI
CTION
3 Year Warranty
ISO 9001
Registered Company
1241 Bundy Boulevard., Winona, Minnesota USA 55987
Phone: +1 (507) 454-5300, Fax: +1 (507) 452-4507 http://www.watlow.com
0600-0044-0001 Rev. C
September 2004
Winona, Minnesota USA
Made in the U.S.A.
$5.00
1
Overview
Watlow's Series L family of temperature limit controllers* provide an economical limit controller solution
for applications where thermal system protection is
needed.
A limit controller is added to applications to prevent
over or under temperature conditions. The limit provides safety assurances against instances where a
thermal runaway condition occurs as a result of a
failed sensor, controller or output device.
The Series L limit controller is recommended for
any application where thermal system runaway could
result in large product scrap costs, damage to system
equipment, potential fire hazard or risk to personnel.
All Series L limit controllers are Factory Mutual and
CSA approved.
These controllers are available with or without an
operator interface and can be ordered in square 1/8th
DIN panel mount, din rail mount, open board or potted
module design configurations. Push-on, quick connect
spade terminal or removable screw clamp style terminal block ordering options provide the electrical connections.
The microprocessor design platform provides improvements in the performance, repeatability, and accuracy offered by Watlow's current line of basic control
products.
The Series LV includes an operator interface to allow viewing and selection of the limit set point. A red
four character, seven segment LED displays the limit
set point. The limit set point selection is made with a
continuous turn, velocity sensitive rotary encoder. Push
to Set operation reduces accidental limit set point adjustments. Limit set point operating range temperature values are customer definable in the product configuration part number.
The Series LF offers fixed limit set points. These
units are supplied without an operator interface. Limit
set point temperature values are customer definable in
the product configuration part number.
The features and performance of these products
make them ideally suited for a wide range of industrial
limit control applications in the food preparation, industrial machinery, packaging and plastic markets.
Watlow's Series L limit controllers include industry
leading service, support and a 3-year warranty.
Features and Benefits
Four Character LED Display
· Improves limit set point adjustment accuracy.
Fixed or Adjustable Limit Set Points
· Tamper proof operation.
· Control flexibility.
Push to Set
· Reduce accidental limit set point adjustments.
Multiple Mounting Options
· Minimizes installation time.
High or Low Limit Operation
· Application flexibility.
Fahrenheit or Celsius Operation with Indication
· Application flexibility.
Sensor Break Protection
· Provides positive system shutdown.
Agency Approvals
· Meets requirements for agency certification.
Micro Processor Based Technology
· Accurate and repeatable protection.
Stock to Four Day Delivery
*Also available, Series C, an on-off temperature
controller version.
Watlow Series L
■ 1 ■
Over view
2
Installation
Installing the Open Board Controller
61.7 mm
2.43 in
45.07 mm
1.775 in
61.7 mm
2.43 in
61.7 mm
2.43 in
45.07 mm
1.775 in
56.3 mm
2.22 in
56.3 mm
2.22 in
SWDC+ .6
N.O.
55.9 mm
2.20 in
61.7 mm
2.43 in
SWDC- .7
COM
55.9 mm
2.20 in
N.C. .8
L1
L2 .9
.10
Terminal Designation Sticker
Use M2.5 (#4) mounting
hardware, not included
Terminal Designation Sticker
Use M2.5 (#4) mounting
hardware, not included
Screw Terminal Model
Spade Terminal Model
Figure 2a
1. Locate and drill four 3.2 mm (0.125 in) holes in the desired panel location. See Figure 2a for hole locations.
2. Mount the controller using four M2.5 (#4) screws.
Installing the Potted Controller
Terminal Designation Sticker
46.6 mm
1.84 in
70.1 mm
2.76 in
35.1 mm
1.38 in
35.1 mm
1.38 in
102.9 mm
4.05 in
88.9 mm
3.50 in
Terminal Designation Sticker
Terminal Designation Sticker
Use [3.5M] #6 hardware,
not included
Figure 2b
1. Drill two 5 mm (0.187 in) diameter holes in the desired panel location. See Figure 2b for hole locations.
2. Mount the controller using two M3.5 (#6) screws.
Watlow Series L
■ 2 ■
Installation
Installing the DIN Rail Mount Controller
94.7 mm
3.73 in
78.1 mm
3.08 in
To install or remove, press
down here. See Installing/
Removing the DIN Rail
Controller procedures below.
90.7 mm
3.57 in
39.1 mm
1.54 in
Part Numb
DIN rail, upper
mounting clip
101.6 mm
4.00 in
80.3 mm
3.16 in
1. SW-1
4.42 in
2. SW-2
3. TC-/S1
35 mm x 7.5 mm
DIN rail is not include
with the assembly
4
rminal Designation Sticker
Agency Label
Panel mounting the bracket requires
two M3.5 (#6) screws, not included
To install, press in here. To
remove, pull out here. See
Mounting/Removing the DIN
Rail Controller procedures
below.
Spade Terminal Model
Screw Terminal Model
Figure 3a
Sub-Panel Mounting
1. Using the controller as a location template, mark both mounting holes.
2. Drill and tap two 2.7 mm (0.106 in) diameter holes in the desired panel location. See Figure 3a above for hole
locations.
3. Mount the controller using two M3.5 (#6) screws.
DIN Rail Mounting
1. Place the DIN rail upper mounting clip on the top edge of the DIN rail. See Figure 3a. DIN rail spec, DIN
50022, 35 mm x 7.5 mm (1.38 in x 0.30 in).
2. Press down firmly on the top back edge of the DIN rail bracket and push in on the bottom, front edge of the
bracket, . The controller “snaps” securely onto the rail. See Figure 3a. If the controller does not snap on, check to
see if the DIN rail is bent. Minimum clipping distance is 34.8 mm (1.37 in), the maximum is 35.3 mm (1.39 in).
Removing the DIN Rail Controller
1. Remove power from the system.
2. Remove all the wiring connections from the back of the controller.
3. While pressing down on the top, back edge of the DIN rail bracket,
pull forward on the bottom, front edge of the DIN rail bracket. See
Figure 3a.
Press forward
with thumb
Removing the Controller from the DIN Rail Bracket
1. Remove power from the system.
2. Remove all the wiring connections from the back of the controller.
3. Remove the DIN rail bracket from the DIN rail.
4. Insert a flat blade screwdriver between the DIN rail bracket and
the case. Rotate the screwdriver to release the DIN rail bracket
hooks from the ridges on the case, while firmly pushing the controller out the front of the DIN rail bracket. Alternate back and
forth between the top and then the bottom. Be sure to support the
controller as it comes out of the bracket. See Figure 3b.
ç Caution: FM approval requires limit switches to be suitably enclosed to
restrict casual user adjustment.
Watlow Series L
Insert flat blade
screwdriver here
Figure 3b
■ 3 ■
Installation
Installing the Square 1/8 DIN Panel Mount Controller
72.4 mm
2.85 in
68.0 mm
2.68 in
Panel Cutout
Panel Thickness
1.52 to 3.18 mm
(0.060 to 0.125 in)
72.4 mm
2.85 in
68.0 mm
2.68 in
19.1 mm
0.75 in
minimum
19.1 mm
0.75 in
minimum
Spade Terminal Model
Customer Front Panel
Part Number Label
Terminal Blocks Locations
on Screw Terminal Models
84.5 mm square
3.33 in
Mounting Bracket
Spade Terminal Model
19.2 mm
0.76 in
51.7 mm
2.04 in
Screw Terminal Models
Contact your local Greenlee supplier for the appropriate
punch kit and cutout tool for rapid mounting.
Figure 4
1. Make the panel cutout using the mounting dimensions above.
2. Remove mounting bracket from the back of the controller.
2. Insert the controller into the panel cutout.
3. While pressing the bezel firmly against the panel, slide the mounting bracket over the back of the controller. Be
sure the levers on the mounting bracket line up with the teeth on the case.
4. Press the bracket up to the back of the panel. The controller should fit tightly in the panel cutout.
Removing the Panel Mount Square 1/8 DIN Controller
1. Remove power from the system.
2. Remove all the wiring connections from the back of the controller.
3. Slide a thin, wide tool (putty knife) under all three mounting tabs, top then bottom, while pushing forward on
the back of the case. Be ready to support the controller as it slides out of the panel cutout.
ç
Caution: FM approval requires limit switches to be suitably enclosed to restrict casual user adjustment.
Watlow Series L
■ 4 ■
Installation
3
Wiring
Ó
Warning:
Use National Electric (NEC) or
other country-specific standard
wiring and safety practices when
wiring and connecting this controller to a power source and to
electrical sensors or peripheral
devices. Failure to do so may result in damage to equipment and
property, and/or injury or loss of
life.
The terminals on the back of the Series L limits are the same for all of the
package styles. They are 6.3 mm (0.25 in) quick connect, push on style terminals or removable screw terminal block. The terminal style is an ordering option.
Check the part number to determine your hardware configuration. Refer
to the wiring diagrams appropriate for your controller’s configuration.
All outputs are referenced to a de-energized state.
Wiring Guidelines
1. Use the correct thermocouple type per the model number on the case sticker of the unit. See dimension drawings for sticker locations.
•
Use correct thermocouple polarity. Red is usually negative.
• If you must extend thermocouple leads, use thermocouple extension
wire to minimize errors.
•
Note: Insulated terminals required for quick connect style
terminals.
For quick connect terminals 1, 2,
6, 7, 8, 9, and 10, AMP P/N 3520406-2 or equivalent recommended. Use Amp crimp tool
P/N 58078-3, insert 90391-3.
For quick connect terminals 3, 4,
and 5, AMP P/N 2-520405-2 or
equivalent recommended. Amp
crimp tool P/N 58078-3, insert
58079-3.
ç
Caution: FM approval requires
limit switches to be suitably enclosed to restrict casual user adjustment.
Watlow Series L
Be sure you have good crimp connections on all wire connections.
• Insulate the thermocouple mounting from the mounting surface to
prevent heat migration input errors.
• Thermocouple leads should be routed separately from any high voltage
lines.
• Long lead lengths create electrical resistance. When using a two-wire
RTD, there will be an additional 2.6° C (4.7° F) error for every 1Ω of lead
length resistance. That resistance when added to the resistance of the RTD
element, can result in erroneous input to the temperature controller.
2. In electrically-noisy environments (heavy switching contactors, motors, solenoids, etc.), use shielded thermocouple lead wire with the shield connected at the sensor end only.
3. Use a separate thermocouple to maintain the limit function of this
controller; do not parallel thermocouple input from the primary controller.
4. All wiring and fusing must conform to the National Electric Code (NEC)
NFPA70 and any other locally applicable codes.
5. Fuse the independent load voltage on the L1 (hot) side and connect it to the
common (C) side of the relay.
Note: The model number determines the connection terminal style. See below for terminal locations.
1
2
3
4
5
6
7
8
9
10
■ 5 ■
1
2
3
4
5
6
7
8
9
10
Wiring
ç
Warning:
Use National Electric (NEC) or
other country-specific standard
wiring and safety practices when
wiring and connecting this controller to a power source and to
electrical sensors or peripheral
devices. Failure to do so may result in damage to equipment and
property, and/or injury or loss of
life.
Figure 6a — AC Power Wiring
• Nominal voltage options:
- 24VÅ (ac)
- 120VÅ (ac)
- 230 to 240VÅ (ac)
1
2
3
4
5
Ó
WARNING: If high voltage is applied to a low-voltage controller,
irreversible damage will occur.
Note: Insulated terminals required for quick connect style
terminals.
For quick connect terminals 1, 2,
6, 7, 8, 9, and 10, AMP P/N 3520406-2 or equivalent recommended. Use Amp crimp tool
P/N 58078-3, insert 90391-3.
6
7
8
L2
9
L1
10
L2
L1
Figure 6b — Thermocouple Input
Thermocouples are polarity sensitive. The negative lead (usually red) must be
connected to TC-.
• Input impedance: >10 MΩ
1
2
Thermocouple -
TC-
Thermocouple + TC+
3
4
5
6
7
8
9
10
For quick connect terminals 3, 4,
and 5, AMP P/N 2-520405-2 or
equivalent recommended. Amp
crimp tool P/N 58078-3, insert
58079-3.
Figure 6c — RTD Input
(100 Ω Platinum DIN curve 0.00385 Ω/Ω/°C)
• Terminals S2 and S3 must be shorted for a two-wire RTD
• Nominal excitation current: 125 µA
3-Wire RTD*
2-Wire RTD
RTD S1
RTD S1
RTD S2
RTD S3
RTD S2
S3
1
2
S1 3
S2 4
S3
5
6
7
8
9
10
*No lead resistance
compensation
Watlow Series L
■ 6 ■
Wiring
ç
Warning:
Use National Electric (NEC)
or other country-specific
standard wiring and safety
practices when wiring and
connecting this controller to
a power source and to electrical sensors or peripheral
devices. Failure to do so may
result in damage to equipment and property, and/or injury or loss of life.
Note: Use of an external reset switch may affect FM approval. Only the use of a momentary N.O. switch is valid
for approval.
Figure 7a — External Reset Switch
• Momentary normally open (N.O.), dry contact closure
SW-1
1
SW-2
2
Momentary N.O. Switch
(customer supplied)
6
7
3
8
4
5
9
10
Figure 7b — Mechanical Relay Output
• Form C contacts
• 8 A, resistive
• 250 VA pilot duty, 120/240VÅ (ac), inductive
• 240VÅ (ac) maximum
• 30VÎ (dc) maximum
Note: Insulated terminals required for quick connect style
terminals.
• See Quencharc note
• For use with ac or dc
• Minimum load current 100 mA
For quick connect terminals
1, 2, 6, 7, 8, 9, and 10, AMP
P/N 3-520406-2 or equivalent
recommended. Use Amp
crimp tool P/N 58078-3, insert 90391-3.
For quick connect terminals
3, 4, and 5, AMP P/N 2520405-2 or equivalent recommended. Amp crimp tool
P/N 58078-3, insert 58079-3.
• Output does not supply power
Customer supplied Quencharc
for pilot duty, inductive loads
only. See note.
External
Load
1
2
6 N.O. Normally Open
C
Common
7
N.C. Normally Closed
8
3
4
5
L2
L1
9
Mechanical Relay
10
N.O.
COM.
Quencharc Note:
Switching pilot duty loads
(relay coils, solenoids, etc.)
with the mechanical relay
output option requires use of
an R.C. suppressor.
N.C.
Internal Circuitry
Watlow carries the R.C. suppressor Quencharc brand
name, which is a trademark
of ITW Paktron. Watlow Part
No. 0804-0147-0000.
Watlow Series L
■ 7 ■
Wiring
System Wiring Examples
Power Disconnect
Switch
L1
120V~(ac)
L2
Fuse
Customer
Supplied
Quencharc
Fuse
Not used
1
2
Fuse
High Limit
Mechanical
Contactor
coil
Fuse
6 SWDC+
SWDC7
8
L2
9
TC- 3
TC+ 4
5
10
Reset Switch
(customer supplied)
SW-1
SW-2
L1
+
SSR-240-10A-DC1
in out Solid-State Relay
Series CV
Temperature Controller
CV-B1JH-0000-0100-C
1
2
TC-
N.O.
COM
7
N.C.
8
L2
9
6
3
TC+
4
5
L1
10
Heater
Series LF
Limit Control
LF-C4JW-0120-AAAA-A
Limit Sensor
Process Sensor
120VÅ (ac)
L1
L2
Series CV
Temperature Controller
CV-B1JH-0000-0100-C
Power Disconnect
Switch
1
1
HighTemp.
Light
10 L1
3
2
4 (+)
3
5 (-)
L2 9
4
TC+
3
TC-
SWDC+
6
4
2
SWDC7
6
7
3 to 32
(+) VÎ (dc) in (-)
SSR-240-10A-DC1
Solid-State Relay
1 CR-1
5
1
8
1
11
48 to 260
VÅ out
9
10 L1
6
SW-1 1
8
14 (+)
10
15 (-)
11
12
1
4
2
L2 9
7
9
Heater
10
TC+
SW-2 2
3 TC7 COM
17
13
N.O. 6
16
N.C. 8
13
2
12
18
Series LF
Limit Controller
LF-C4JW-0120-AAAA-A
1 CR
R
2
2
High-Temperature Light
Figure 8 — System Wiring Examples
Watlow Series L
■ 8 ■
Wiring
4
User Interface
LV XXXX XXXX XXXX A
LIMIT LV
F
C
LED Display: Indicates
the limit set point.
F or C Indicator Light: Lit to
indicate if unit is configured for
degrees Fahrenheit or degrees
Celsius.
ALARM
PUSH/RESET Key: Press
and hold key to adjust the
limit set point temperature.
New limit set point is
entered 3 seconds after
the knob stops moving.
Press key to reset latched
limit output once temperature is back in safe region.
Can also be reset through
customer supplied
external reset switch.
ALARM Indicator Light: Lit
when limit is tripped.
SET
RESET
Finger Tip Indent: Insert finger
tip into indent for quick and easy
set point changes.
Limit Set Point Knob: To
increase limit set point, turn
knob clockwise. To decrease
limit set point, turn knob counterclockwise. The new set point is
entered 3 seconds after the
knob stops moving. Limit set
point will not change unless
PUSH/RESET key is pressed.
Figure 9 — Variable Limit Set Point, Standard Interface
ç
Caution: FM approval requires limit switches to be suitably enclosed to restrict casual user adjustment.
Watlow Series L
■ 9 ■
User Inter face
Troubleshooting
On indicating limits, the display is not illuminated.
• Power supply switch off.
• Fuse blown.
• Breaker tripped.
• Safety interlock door switch activated.
• Wiring incorrect or open.
• Power supply voltage incorrect.
• Defective limit.
• Turn switch on.
• Replace fuse (check cause of failure).
• Reset breaker (check cause of failure).
• Close door.
• Check wiring.
• Verify input power
• Repair or replace limit.
Troubleshooting thermocouple inputs
Temperature reading is incorrect, showing a sensor error, [Er;In] , or ALARM LED
is switching at the wrong
temperature.
• Sensor or limit may be bad. Sensor connections may be bad.
• Ambient temperature in the control
cabinet is over 70°C.
• Ground loop problem. Can occur when
using a switched DC output and a
grounded thermocouple.
Temperature seems to be decreasing, but actual process
is increasing.
• Thermocouple polarity is reversed. In
the US, red wire insulation denotes the
negative wire.
• Place a jumper wire across the thermocouple input terminals. The display
should indicate ambient temperature. If
it does, the limit is OK.
- For high limit: Start with limit set point
above ambient temperature, ALARM
LED should be off. Decrease limit set
point until ALARM LED goes on. It
should be approximately ambient temperature.
- For low limit: Start with limit set point
below ambient temperature, ALARM
LED should be off. Increase limit set
point until ALARM LED goes on. It
should be approximately ambient temperature.
• Measure temperature in cabinet to ensure it is below 70C. Vent cabinet or add
fans if necessary.
• Remove power from the system. Use an
ohm meter to measure resistance between output DC- and the thermocouple
sheath. If there is continuity, replace sensor with an ungrounded thermocouple.
• Check thermocouple connections. All
connections, including extension wire
must maintain the correct polarity. Correct polarity problems.
Temperature seems to be
• Sensor is bad. Thermocouple is shorted.
reading low and not increasing while actual process temperature is increasing.
• Check thermocouple connections. Check
thermocouple wire insulation to make
sure it is not damaged, causing the wires
to short (making a new junction).
Temperature seems to be offset from actual process temperature, or the ALARM
LED switches on at the
wrong temperature. The offset changes with changes in
process temperature.
• Check thermocouple connections. Check
to make sure that only thermocouple extension wire of the correct type was used
to extend thermocouple leads. Replace if
necessary.
Watlow Series L
• Copper wire was used instead of thermocouple extension wire. Connectors of
metals different than thermocouple metal
were used to splice or make connections.
■ 10 ■
Troubleshooting
Indication
Probable Cause(s)
Corrective Action
Troubleshooting RTD inputs
Temperature reading is incor- • Sensor or limit may be bad. Sensor conrect, showing a sensor error, nections may be bad.
[Er;In] , or ALARM LED is
switching at the wrong temperature.
• Place a 110 ohm resistor across the sensor input terminals.
- For high limit: Start with limit set point
above ambient temperature, ALARM LED
should be off. Decrease limit set point until ALARM LED goes on. It should be approximately ambient temperature. If it
does, the limit is OK. Sensor or connections may be bad.
- For low limit: Start with limit set point
below ambient temperature, ALARM LED
should be off. Increase limit set point until ALARM LED goes on. It should be approximately ambient temperature. If it
does, the limit is OK. Sensor or connections may be bad.
• Ambient temperature in the control cab- • Measure temperature in cabinet to ensure it is below 70°C (158°F). Vent cabinet
inet is over 70°C (158°F).
or add fans if necessary.
• Check sensor connections. Measure lead
• Sensor connections may be bad. Exceswire resistance. There will be a 2.6C
sive lead wire resistance.
(4.7°F) error for every ohm of lead wire
resistance.
Troubleshooting limit outputs
ALARM is not tripped when • Temperature appears to be incorrect.
it should be. ALARM LED is See input troubleshooting.
not on (relay is energized in
safe condition, N.O. contact is • Limit set point is not set correctly.
closed and N.C. contact is
open).
• See input troubleshooting.
ALARM is tripped when it
should not be. ALARM LED
is on (relay is de-energized in
limit condition, N.O. contact
is open and N.C. contact is
closed).
• Limit output is tripped (latched).
• Press RESET key to reset limit.
• Output wiring is incorrect.
• Verify wiring. Relay outputs act as a
switch, they do not source power.
• See input troubleshooting.
Limit output signal is on
when it should not be on.
Load LED is on.
Limit load is on when it
should be off. ALARM LED
is off.
• Temperature appears to be incorrect,
see input troubleshooting.
• Limit set point is not set correctly.
• Verify limit set point setting.
• Limit output is defective.
• Repair or replace limit.
• Temperature reading is incorrect on dis- • See input troubleshooting.
play of indicating controls or limit, see input troubleshooting.
• Set point is not set correctly
• Verify limit set point setting.
• Power switching device (mechanical relay, contactor, etc.) is shorted. Limit output shorted.
• Remove wires from output of limit to
input of power switching device. If load is
still on, replace power switching device. If
load turns off, replace limit or sensor. See
input troubleshooting..
• Verify wiring.
• Output wiring is incorrect.
Watlow Series L
• Verify limit set point setting.
■ 11 ■
Troubleshooting
Specifications
Controller
• Microprocessor based, limit controller.
• Nominal switching hysteresis, typically 1.7°C (3°F)
• High or low limit, factory selectable.
• Latching output requires manual reset upon over
or under temperature condition.
• Manual or automatic reset on power loss, factory
selectable.
• Internal front panel or external customer supplied
momentary reset switch.
• Input filter time: 1 second.
Operator Interface (model dependent)
• Four digit , 7 segment LED displays, .28" high.
• °F or °C indicator LED.
• ALARM indicator LED.
• Continuous turn, velocity sensitive rotary encoder
for limit set point adjustment.
• Front panel SET/RESET key on variable set point
models.
• No operator interface on fixed set point models.
Standard Conditions For Specifications
• Rated line voltage, 50 to 60Hz, 0 to 90% RH noncondensing, 15-minute warm-up.
Calibration ambient range: 25°C (77°F) ±3°C
Sensor Input
Thermocouple
• Grounded or ungrounded.
• Type E, J, K, T thermocouple types.
• >10 MΩ input impedance.
• 250 nV input referenced error per 1Ω source resistance.
RTD
• 2-wire platinum, 100 Ω.
• DIN curve (.00385 curve).
• 125 µA nominal RTD excitation current.
Input Accuracy Span Range
Thermocouple Input
Type E:
-200 to 800°C or -328 to 1,470°F
Type J:
0 to 750°C or
32 to 1,382°F
Type K:
-200 to 1,250°C or -328 to 2,282°F
Type T:
-200 to 350°C or -328 to
662°F
RTD (DIN):
-200 to 800°C or -328 to 1,472°F
• Calibration accuracy: ±1% of input accuracy span,
±1° at standard conditions and actual calibration
ambient.
Exception: Type T, ±2.4% of input accuracy span
for -200 to 0°C (-328 to 32°F)
• Temperature stability: ±0.3 degree per degree
change in ambient.
Watlow Series L
RTD Input
• Calibration accuracy: ±1% of input accuracy span
±1° at standard conditions and actual calibration
ambient.
• Temperature stability: ±0.2 degree per degree
change in ambient
Allowable Operating Ranges
Type E:
-200 to 800°C or -328 to 1,470°F
Type J:
-210 to 1,038°C or -346 to 1,900°F
Type K:
-270 to 1,370°C or -454 to 2,500°F
Type T:
-270 to 400°C or -454 to
750°F
RTD (DIN):
-200 to 800°C or -328 to 1,472°F
External Reset Switch
• Momentary, dry contact closure. See wiring section.
Output Types
Electromechanical Relay, Form C
• Minimum load current: 100 mA.
• 8 A @ 240VÅ (ac) or 30VÎ (dc) maximum, resistive.
• 250 VA pilot duty, 120/240VÅ (ac) maximum, inductive.
• Use RC suppression for inductive loads.
• Electrical life 100,000 cycles at rated current.
Agency Approvals
Series LF (potted version only)
• UL 991 recognized temperature limit for food service industry.
Series LV and Series LF (including potted version)
• UL 873 recognized temperature regulator. File
#E43684.
• UL 197 reviewed for use in food service appliances.
• ANSI Z21.23 Gas appliance thermostat approval.
• CSA C22.2#24 approved temperature control. File
#30586.
• FM Class 3545 temperature limit switches. File
#3017239.
• CE - see Declaration of Conformity.
Terminals
• 6.4 mm (0.25 in) quick connect, push-on terminals.
See order options. Refer to Wiring section for
crimp-on terminal recommendations.
• Removable screw clamp style terminal blocks. See
order options.
• Wire gauge 0.1 to 4 mm2 (30 to 12 AWG). Strip
length, 8 mm (0.30 in).
• Torque: 0.8 Nm (7 in-lb) maximum.
■ 12 ■
Specifications
Power
• 24VÅ (ac) +10%; -15%; 50/60 Hz, ±5%
• 120VÅ (ac) +10%; -15%; 50/60 Hz, ±5%
• 208 to 240VÅ (ac) +/-10%, Series LF and CF only
• 230 to 240VÅ (ac) +10%; -15%; 50/60 Hz, ±5%
• 10VA maximum power consumption.
• Data retention upon power failure via nonvolatile
memory.
Operating Environment
• 0 to 70°C (32 to 158°F)
• 0 to 90% RH, non-condensing.
• Storage temperature: -40 to 85°C (-40 to 185°F)
Dimensions
• DIN Rail model can be DIN rail or chassis mount
DIN rail spec, DIN 50022, 35 mm x 7.5 mm (1.38
in x 0.30 in)
Style
Width
Height
Depth
Open board
61.7 mm
(2.43 in)
61.7 mm
(2.43 in)
45.1 mm
(1.78 in)
Potted
70.1 mm
(2.76 in)
102.9 mm
(4.05 in)
46.6 mm
(1.84 in)
DIN Rail
78.1 mm
(3.08 in)
112.3 mm
(4.42 in)
90.7 mm*
(3.57 in)
Square 1/8
DIN Panel
72.4 mm
(2.85 in)
72.4 mm
(2.85 in)
Behind panel
51.7 mm
(2.04 in)
*Depth including DIN rail, 94.7 mm (3.73 in)
Note: These specifications are subject to change without prior notice.
Watlow Series L
Glossary
automatic power reset — A feature in latching limit
controllers that does not recognize power outage as a
limit condition. When power is restored, the output is
re-energized automatically, as long as the temperature
is within limits.
latched output — Limit control output latches in deenergized condition when over or under temperature
condition occurs and cannot be reset unless temperature drops below set point.
limit or limit controller — A highly reliable, discrete
safety device (redundant to the primary controller) that
monitors and limits the temperature of the process or a
point in the process. When temperature exceeds or falls
below the limit set point, the limit controller interrupts
power through the load circuit. A limit controller can
protect equipment and people when it is correctly installed with its own power supply, power lines, switch
and sensor.
manual power reset — A feature in latching limit
controllers that does recognize power outage as a limit
condition. When power is restored, the output is not reenergized automatically, even if the process is within
limits. An operator must use the reset key or switch to
manually re-energize the output on power up.
manual reset — A feature on a limit controller that requires human intervention to return the limit to normal
operation after a limit condition has occurred.
safety limit — An automatic limit intended for use in
applications where an over-temperature fault may
cause a fire.
■ 13 ■
Specifications/Glossar y
Ordering Information and Model Numbers
Limit Control no user interface
L F
_ _ _ _
_ _ _ _
A A A A
_
Set Point Type
F
Fixed Limit Set Point
Line Voltage
C
120VÅ (ac)
E
230-240VÅ (ac)
G
24VÅ (ac)
Controller Package
1
Panel Mount, Square 1/8 DIN -Spade Terminals
2
DIN Rail Mount -Spade Terminals
3
Open Board, not potted -Spade Terminals
4
Potted Case -Spade Terminals
5
Panel Mount, Square 1/8 DIN -Screw Terminals
6
DIN Rail Mount -Screw Terminals
7
Open Board, not potted -Screw Terminals
Sensor and Scale
H
Type J -346 to 1900 Degrees F
J
Type J -210 to 1038 Degrees C
K
Type K -454 to 2500 Degrees F
L
Type K -270 to 1370 Degrees C
M
Type T -454 to 750 Degrees F
N
Type T -270 to 400 Degrees C
P
100Ω RTD -328 to 1472 Degrees F
R
100Ω RTD -200 to 800 Degrees C
S
Type E -328 to 1470 Degrees F
T
Type E -200 to 800 Degrees C
Limit Type
U
High Limit, Manual Power Reset
W
High Limit, Auto Power Reset
Y
Low Limit, Manual Power Reset
Z
Low Limit, Auto Power Reset
Fixed Limit Set Point Value *
XXXX
Limit Set Point Value**
Overlay/Custom Option
A
Standard
*Note: Limit set point must fall within the sensor operating range.
**Note: A (-) is used in the left digit of the operating range to indicate negative values.
Watlow Series L
■ 14 ■
Ordering Information
Ordering Information and Model Numbers
Limit Control, LED display, Front panel reset switch
L V - _ _ _ _ - _ _ _ _ - _ _ _ _ - _
Set Point Type
V
Variable Limit Set Point
Line Voltage
C
120VÅ (ac)
E
230-240VÅ (ac)
G
24VÅ (ac)
Controller Package
1
Panel Mount, Square 1/8 DIN -Spade Terminals
2
DIN Rail Mount -Spade Terminals
5
Panel Mount, Square 1/8 DIN -Screw Terminals
6
DIN Rail Mount -Screw Terminals
Sensor and Scale
H
Type J -346 to 1900 Degrees F
J
Type J -210 to 1038 Degrees C
K
Type K -454 to 2500 Degrees F
L
Type K -270 to 1370 Degrees C
M
Type T -454 to 750 Degrees F
N
Type T -270 to 400 Degrees C
P
100Ω RTD -328 to 1472 Degrees F
R
100Ω RTD -200 to 800 Degrees C
S
Type E -328 to 1470 Degrees F
T
Type E -200 to 800 Degrees C
Limit Type
U
High Limit, Manual Power Reset
W
High Limit, Auto Power Reset
Y
Low Limit, Manual Power Reset
Z
Low Limit, Auto Power Reset
Low Limit Set Point Range Limit *
XXXX
Low Limit Set Point Operating Range Value**
High Limit Set Point Range Limit *
XXXX
High Limit Set Point Operating Range Value
Overlay/Custom Option
A
Standard
*Note: Set point ranges must fall within the sensor operating range.
**Note: A (-) is used in the left digit of the operating range to indicate negative values.
Watlow Series L
■ 15 ■
Ordering Information
Notes
Watlow Series L
■ 16 ■
Safety Information
We use note, caution and warning symbols throughout this book to draw your attention to
important operational and safety information.
A “NOTE” marks a short message to alert you to an important detail.
ç
CAUTION or
WARNING
Ó
Electrical
Shock Hazard
CAUTION or WARNING
A “CAUTION” safety alert appears with information that is important for protecting your
equipment and performance. Be especially careful to read and follow all cautions that apply to
your application.
A “WARNING” safety alert appears with information that is important for protecting you, others and equipment from damage. Pay very close attention to all warnings that apply to your
application.
The safety alert symbol, ç (an exclamation point in a triangle) precedes a general CAUTION
or WARNING statement.
The electrical hazard symbol, Ó (a lightning bolt in a triangle) precedes an electric shock hazard CAUTION or WARNING safety statement.
Technical Assistance
If you encounter a problem with your Watlow controller, review your configuration information
to verify that your selections are consistent with your application: inputs, outputs, alarms, limits, etc. If the problem persists, you can get technical assistance from your local Watlow representative (see back cover), by e-mailing your questions to wintechsupport@watlow.com or by
dialing +1 (507) 494-5656 between 7 a.m. and 5 p.m., Central Standard Time (CST). Ask for for
an Applications Engineer. Please have the following information available when calling:
• Complete model number
• System wiring information
• Series L Limit User’s Manual
Warranty
These controllers are manufactured by ISO 9001-registered processes and are backed by a
three-year warranty.
Return Material Authorization (RMA)
1. Call Watlow Customer Service, (507) 454-5300, for a Return Material Authorization (RMA)
number before returning any item for repair. We need this information:
•
Ship to address
•
Bill to address
•
Contact name
•
Phone number
•
Method of return shipment
•
Your P.O. number
•
Detailed description of the problem
•
Any special instructions
•
Name and phone number of person returning the product.
2. Prior approval and an RMA number, from the Customer Service Department, is needed
when returning any unused product for credit. Make sure the RMA number is on the outside of
the carton, and on all paperwork returned. Ship on a Freight Prepaid basis.
3.
After we receive your return, we will examine it and try to verify the reason for the return.
4. In cases of manufacturing defect, we will enter a repair order, replacement order or issue
credit for material returned.
5. To return products that are not defective, goods must be be in new condition, in the original boxes and they must be returned within 120 days of receipt. A 20 percent restocking charge
is applied for all returned stock controls and accessories.
6.
If the unit is unrepairable, it will be returned to you with a letter of explanation.
7.
Watlow reserves the right to charge for no trouble found (NTF) returns.
The Series L Limit user’s manual is copyrighted by Watlow Winona, Inc., © September 2004
with all rights reserved.
Declaration of Conformity
Series L
Watlow Winona, Inc.
1241 Bundy Blvd.
Winona, MN 55987 USA
Declares that the following product:
Designation:
Series L
Model Numbers:
LF - (C, E or G) (1, 2, 3, 4, 5, 6 or 7) (any letter) (U, W, Y or Z) (any four numbers or - and three numbers) - (AAAA) - may be followed by additional numbers or letters
LV - (C, E or G) (1, 2, 5 or 6) (any letter) (U, W, Y or Z) - (any four numbers or
- and three numbers) - (any four numbers) - may be followed by additional numbers or letters
Classification:
LF and LV = Temperature Regulator Installation Category II, Pollution degree 2
Rated Voltage:
24, 120, 230/240 V~ (ac)
Rated Frequency:
50 or 60 Hz
Rated Power Consumption:
10VA maximum
Meets the essential requirements of the following European Union Directives by using the relevant
standards shown below to indicate compliance.
89/336/EEC Electromagnetic Compatibility Directive
EN 61326: 1997 With A1, 1998:
A2:2001:
Electrical equipment for measurement, control and laboratory use – EMC requirements (Industrial Immunity, Class B
Emissions).
EN 61000-4-2:
1996 + A1, 1998
Electrostatic Discharge Immunity
EN 61000-4-3:
1997
Radiated Field Immunity
EN 61000-4-4:
1995
Electrical Fast-Transient / Burst Immunity
EN 61000-4-5:
1995 + A1, 1996
Surge Immunity
EN 61000-4-6:
1996
Conducted Immunity
EN 61000-4-11:
1994
Voltage Dips, Short Interruptions and Voltage Variations Immunity
EN 61000-3-2:
1995 + A1-3: 1999
Harmonic Current Emissions
EN 61000-3-3:
1995 + A1, 1998
Voltage Fluctuations and Flicker
73/23/EEC Low-Voltage Directive
EN 60730-1:2000 With A11:2002 and
EN 60730-2-9:2002:
Automatic electric controls for household and similar use:
Particular requirements for temperature sensing controls.
Raymond D. Feller III
Winona, Minnesota, USA
Name of Authorized Representative
Place of Issue
General Manager
February 2004
Title of Authorized Representative
Date of Issue
Signature of Authorized Representative
How to Reach Us
Your Authorized Watlow Distributor:
TOTAL
CUS
CUSTOMER
ER
SATISF
TISFACTI
CTION
3 Year Warranty
Corporate Headquarters in the
U.S.:
Watlow Electric Manufacturing Co.
12001 Lackland Road
St. Louis, Missouri, USA 63146
Telephone: +1 (314) 878-4600
Fax: +1 (314) 878-6814
Europe:
Watlow GmbH
Industriegebiet Heidig
Lauchwasenstr. 1, Postfach 1165
Kronau 76709 Germany
Telephone: +49 (0) 7253-9400 0
Fax: +49 (0) 7253-9400-44
Watlow France S.A.R.L.
Immeuble Somag,16 Rue Ampère,
Cergy Pontoise CEDEX 95307 France
Telephone: +33 (1) 3073-2425
Fax: +33 (1) 3073-2875
Watlow Italy S.R.L.
Via Meucci 14,
20094 Corsico MI
Italy
Telephone: +39 (02) 4588841
Fax: +39 (02) 458-69954
Watlow Limited
Robey Close, Linby Industrial Estate,
Linby Nottingham England, NG15 8AA
Telephone: +44 (0) 115 9640777
Fax: +44 (0) 115 9640071
Latin America:
Watlow de México
Av. Fundición #5,
Col. Parques Industriales,
Querétaro, Qro. México CP-76130
Telephone: +52 (442) 217-6235
Fax: +52 (442) 217-6403
Asia/Pacific:
Watlow Australia Pty., Ltd.
23 Gladstone Park Drive,
Tullamarine, Victoria 3043 Australia
Telephone: +61 (39) 335-6449
Fax: +61 (39) 330-3566
Watlow China, Inc.
179, Zhong Shan Xi Road
Hong Qiao Cointek Bldg, Fl. 4, Unit P
Shanghai 200051 China
Telephone: +86 (21) 6229-8917
Fax: +86 (21) 6228-4654
Watlow Japan Ltd. K.K.
Azabu Embassy Heights 106,
1-11-12 Akasaka,
Minato-ku, Tokyo 107-0052 Japan
Telephone: +81 (03) 5403-4688
Fax: +81 (03) 5403-4646
Watlow Korea Co., Ltd.
3rd F. Taehong Bldg.
20-6, Seocho-gu Yangjae-dong
Seoul, Korea 137-130
Telephone: +82 (2) 575-9804
Fax: +82 (2) 575-9831
Watlow Malaysia Sdn Bhd
38B Jalan Tun Dr Awang
11900 Bayan Lepas
Penang Malaysia
Telephone: +60 (4) 641-5977
Fax: +60 (4) 641-5979
Watlow Singapore Pte. Ltd.
Ayer Rajah Crescent
#03-23, Ayer Rajah Industrial Estate
Singapore 139949
Telephone: +65 773 9488
Fax: +65 778 0323
Watlow Electric Taiwan
10F-1 No. 189
Chi-Shen 2nd Road,
Kaohsiung, Taiwan
Telephone: +886 (7) 288-5168
Fax: +886 (7) 288-5568
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