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.
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.
Ó
Electrical
Shock Hazard
CAUTION or WARNING
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
• Basic Controller 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.
Watlow's Series C family of basic temperature controllers* provide an economical controller solution for
applications where simple on/off control is needed.
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 temperature control products.
The Series CV includes an operator interface to allow viewing and selection of the control set point. A
red four-character, seven-segment LED displays the set
point. It is also available with a push-to-show process
option. The set point selection is made with a continuous turn, velocity-sensitive rotary encoder. Set point
range temperature values are customer definable in
the product configuration part number.
The Series CF offers fixed control points. These
units are supplied without an operator interface. Operating set point temperature values are customer definable in the product configuration part number.
The Series TM is a temperature indicator only version. It is available in DIN rail or panel mount configurations.
The features and performance of these products
make them ideally suited for a wide range of industrial
control applications in the food preparation, industrial
machinery, packaging and plastic markets.
Watlow's Series C and TM controllers include industry-leading service, support and a 3-year warranty.
*Also available in an FM-approved limit version.
Features and Benefits
Four-Character LED Display
• Improves Set Point adjustment accuracy.
Fixed or Adjustable Set Points
• Tamper Proof Operation.
• Control Flexibility.
Set Point Adjustment Options
• Rotary encoder.
• Tactile increment and decrement keys.
Push to Set Option
• Reduce accidental set point adjustments.
Push to Display Process Option
• Allows viewing of process value.
Multiple Mounting Options
• Minimizes installation time.
Heat or Cool 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.
• NEMA 4X/IP65 seal panel-mount versions available.
• W.E.E.E; CE; RoHS
Microprocessor Based Technology
• Accurate and repeatable control.
Stock to Four Day Delivery
Watlow Series C/TM • 1 • Chapter 1 Overview
Page 4
2
Installation
Installing the Open Board Controller
61.7 mm
2.43 in
56.3 mm
2.22 in
Terminal Designation Sticker
45.07 mm
1.775 in
Screw Terminal Model
61.7 mm
55.9 mm
2.43 in
2.20 in
Use M2.5 (#4) mounting
hardware, not included
SWDC+
SWDC-
N.O.
COM
N.C.
L2
45.07 mm
1.775 in
.6
.7
.8
.9
.10
L1
61.7 mm
2.43 in
56.3 mm
2.22 in
Terminal Designation Sticker
Spade Terminal Model
61.7 mm
55.9 mm
2.43 in
2.20 in
Use M2.5 (#4) mounting
hardware, not included
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
35.1 mm
1.38 in
35.1 mm
1.38 in
70.1 mm
2.76 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 C • 2 • Chapter 2 Installation
Page 5
39.1 mm
(1.54 in)
78.1 mm
(3.08 in)
80.3 mm
(3.16 in)
101.6 mm
(4.00 in)
112.3 mm
(4.42 in)
Part Number Label
94.7 mm
(3.73 in)
90.7 mm
(3.57 in)
1.
2.
3.
TC-/S1
4.
TC+/S2
5.
SW-1
SW-2
81.8 mm
To install or remove,
press down here.
See Installing/ Removing
the DIN Rail Controller
procedures below.
DIN rail, upper
mounting clip
35 mm x 7.5 mm
DIN rail is not included
S3
with the assembly
(3.22 in)
80.0 mm
(3.07 in)
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.
Agency Label
Spade 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).
Terminal Designation Sticker
Screw Terminal Model
Tactile Key Model
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.
Figure 3b
Press forward
with thumb
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.
Insert flat blade
screwdriver here
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
Watlow Series C • 3 • Chapter 2 Installation
Page 6
72.4 mm
(2.85 in)
68.0 mm
(2.68 in)
72.4 mm
(2.85 in)
19.1 mm
(0.75 in)
minimum
84.5 mm square
(3.33 in)
Panel Cutout
Panel Thickness
1.52 to 3.18 mm
(0.060 to 0.125 in)
19.1 mm
(0.75 in)
minimum
68.0 mm
(2.68 in)
Customer Front Panel
Terminal Blocks Locations
on Screw Terminal Models
Spade Terminal Model
Part Number Label
Mounting Bracket
6.4 mm
(0.25 in)
Tactile Key,
Spade Terminal Model
19.2 mm
(0.76 in)
51.7 mm
(2.04 in)
Contact your local Greenlee supplier for the appropriate
punch kit and cutout tool for rapid mounting.
Screw Terminal Models
Screw Terminal Model
Figure 4
Installing the Square 1/8 DIN Panel Mount
Controller
1. Make the panel cutout using the mounting dimensions above.
2. Remove mounting bracket from the back of the controller.
3. If your controller has a gasket, check to see that the
gasket is not twisted, and is seated within the case
bezel flush with the panel. Place the case in the
cutout. Make sure the gasket is between the panel
cutout and the case bezel.
4. While pressing the front of the case firmly against
the panel, slide the mounting collar over the back of
the control. The tabs on the collar must line up with
the mounting ridges on the case for secure instal-
Watlow Series C • 4 • Chapter 2 Installation
lation. See Figure 4. Slide the collar firmly against
the back of the panel, getting it as tight as possible.
To ensure a tight seal, use your thumb to lock the
tabs into place while pressing the case from side to
side. Don’t be afraid to apply enough pressure to install the controller. The tabs on each side of the collar have teeth that latch into the ridges. Each tooth
is staggered at a different height, so only one of the
tabs on each side are ever locked into the ridges
at a time. Confirm that the tabs on one side of the
collar correspond with those on the opposite side.
Make sure the two corresponding tabs are the only
ones locked in the ridges at the same time. If the
corresponding tabs are not supporting the case at
the same time, you will not have a NEMA 4X seal.
5. Insert the control chassis into its case and press the
bezel to seat it. Make sure the inside gasket is also
seated properly and not twisted. The hardware installation is complete. Proceed to the wiring section.
Page 7
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.
Watlow Series C • 5 • Chapter 2 Installation
Page 8
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.
Note: Insulated terminals required for quick connect style
terminals.
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 2-520405-2 or
equivalent recommended. Amp
crimp tool P/N 58078-3, insert
58079-3.
The terminals on the back of the Series C and Series TM controllers 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 stick-
er 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.
• Be sure you have good crimp connections on your thermocouple con-
nections.
• 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 and there is not any lead
resistance compensation. When using a two or three-wire RTDs, 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
Watlow Series C • 6 • Chapter 3 Wiring
1
2
6
7
3
4
5
8
9
10
Page 9
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.
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.
Figure 7a — AC Power Wiring
• Nominal voltage options:
- 24VÅ (ac)
- 120VÅ (ac)
- 230 to 240VÅ (ac)
1
2
3
4
5
6
7
8
9
10
L2
L1
L2
L1
Figure 7b — Thermocouple Input
Thermocouples are polarity sensitive. The negative lead (usually red) must be
connected to TC-.
• Input impedance: >10 MΩ
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 2-520405-2 or
equivalent recommended. Amp
crimp tool P/N 58078-3, insert
58079-3.
Note: To prevent ground loops,
isolation needs to be maintained
from input to output when using a switched DC output. Ungrounded thermocouples recommended.
6
7
8
9
10
Thermocouple -
Thermocouple +
TC
TC+
1
2
-
3
4
5
Figure 7c — 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
RTD S1
RTD S2
RTD S3
*No lead resistance
compensation
2-Wire RTD3-Wire RTD*
RTD S1
RTD S2
S3
S1
S2
S3
1
2
3
4
5
6
7
8
9
10
Watlow Series C • 7 • Chapter 3 Wiring
Page 10
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: Insulated terminals required for quick connect style
terminals.
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.
Quencharc Note:
Switching pilot duty loads
(relay coils, solenoids, etc.)
with the mechanical relay
output options requires use
of an R.C. suppressor.
Watlow carries the R.C. suppressor Quencharc brand
name, which is a trademark
of ITW Paktron. Watlow Part
No. 0804-0147-0000.
Figure 8a — Switched DC Output
• Maximum voltage output into an infinite load, 24VÎ (dc)
• Minimum output voltage at 10 mA, 5VÎ (dc)
• Minimum load impedance, 500Ω
• Offstate leakage, 100μAÎ (dc)
• Not recommended for switching mechanical relays
• Output supplies power
1
2
3
4
5
SWDC+
6
SWDC-
7
8
9
10
Switched DC+
Switched DC-
Switched DC
17V (dc) unreg
300Ω
300Ω
Internal Circuitry
+
External
-
Load
SWDC+
-
SWDC
Figure 8b — Mechanical Relay Output
• Form C contacts
• 8 A, resistive
• 250 VA pilot duty, 120/240VÅ (ac), inductive
• 240VÅ (ac) maximum
• 30VÎ (dc) maximum
• See Quencharc note
• For use with ac or dc
• Minimum load current 100 mA
• Output does not supply power
1
2
3
4
5
6
7
8
9
10
Customer supplied Quencharc
for pilot duty, inductive loads
only. See note.
Normally Open
N.O.
C
Common
N.C.
Normally Closed
Mechanical Relay
N.O.
COM.
N.C.
Internal Circuitry
External
Load
L2
L1
Watlow Series C • 8 • Chapter 3 Wiring
Page 11
Power Disconnect
Switch
L1
120V~(ac)
L2
Not used
TC-
TC+
Series CV
Temperature Controller
CVB1JH00000100C
System Wiring Examples
Fuse
Fuse
coil
1
2
3
4
5
6
7
8
9
10
SWDC+
SWDC-
L2
L1
+
out
in
-
Customer
Supplied
Quencharc
High Limit
Mechanical
Contactor
SSR-240-10A-DC1
Solid-State Relay
Heater
Reset Switch
(customer supplied)
SW-1
SW-2
TC-
TC+
1
2
3
4
5
Fuse
Fuse
N.O.
6
COM
7
N.C.
8
L2
9
L1
10
HighTemp.
Light
120V• • (ac)••
L1
Power Disconnect
Switch
1
1
2
3
4
5
1
6
1
7
8
9
10
11
12
1
13
Process Sensor
3
89
11
17
4 (+)
5 (-)
1 CR-1
14 (+)
15 (-)
Limit Sensor
Series CV
Temperature Controller
CVB1JH00000100C
10
L19
4
TC+
TC-
3
SWDC+SWDC-
6
6
(+)(-)
V• • (dc) in
10
L1
4
TC+
TC-
3
7
COM
Series LF
Limit Controller
LFC4JW0120AAAAA
L2
3 to 32
V• • out
SW-1
SW-2
N.O.
N.C.
7
7
SSR-240-10A-DC1
Solid-State Relay
10
9
L2
12
1
13
2
6
8
18
High-Temperature Light
Series LF
Limit Control
LFC4JW0120AAAAA
Heater48 to 260
1 CR
16
R
L2
2
2
2
2
2
Figure 9 — System Wiring Examples
Watlow Series C • 9 • Chapter 3 Wiring
Page 12
4
LED Display: Indicates
the set point. Display
momentarily blinks when
new set point value is
entered.
Finger Tip Indent: Insert
finger tip into indent for
quick and easy set point
changes.
User Interface
Variable Set Point, Standard
CV _ _ (1, 2, 5 or 6) _ _ _ _ _ _ _ _ _ A
CV
CV
F
C
LOAD
F or C Indicator Light: Lit
to indicate if unit is configured
for degrees Fahrenheit or
degrees Celsius.
LOAD Indicator Light: Lit
when output is energized.
Set Point Knob: To increase
set point, turn knob clockwise.
To decrease set point, turn
knob counterclockwise. Set
point can be changed at any
time. The new set point is
entered 3 seconds after the
knob stops moving.
Figure 10a — Variable Set Point Standard
Interface
Variable Set Point, Standard
CV _ _ (A, B, C or D) _ _ _ _ _ _ _ _ _ A
LED Display: Indicates
the set point. Display
momentarily blinks when
new set point value is
entered.
To adjust the Calibration Offset on models with tactile
keys, first hold down both the Increment and Decrement keys for five seconds. The display will first show
[`CAL] for five seconds, then it will display the Calibration Offset value. Adjust the value with the Increment and Decrement keys (range: -30 to 30°). The new
value will take effect three seconds after the last key
stroke. The display will blink, then return to the primary display after five seconds.
Figure 10b — Variable
Set Point with Tactile
Keys
CV
F
C
LOAD
F or C Indicator Light: Lit
to indicate if unit is configured
for degrees Fahrenheit or
degrees Celsius.
LOAD Indicator Light: Lit
when output is energized.
Increment and Decrement Keys:
Press the Up-Arrow key to
increase the set point.
Press the Down-Arrow key to
decrease the set point.
The new set point is entered 3
seconds after the last key stroke.
To change the temperature units on models with
tactile keys, first hold down both the Increment and
Decrement keys for ten seconds. The display will show
[F``C] for two seconds. Adjust the units with the Increment and Decrement keys. The new value will take
effect three seconds after the last key stroke. The display will blink, then return to the primary display after
five seconds. The set point value, process value and
offset will automatically adjust to the new temperature
scale.
Watlow Series C • 10 • Chapter 4 User Interface
Page 13
Variable Set Point, Push for Process
CV _ (1, 2, 5 or 6) _ _ _ _ _ _ _ _ _ _ B
LED Display: Indicates set point,
until the PROCESS key is pressed.
Process value (actual temperature)
is displayed until the PROCESS key
is released.
CV
CV
F
C
LOAD
F or C Indicator Light: Lit
to indicate if unit is configured
for degrees Fahrenheit or
degrees Celsius.
PROCESS Key: Press and hold
this key to display process
(actual temperature) value. Set
point is not adjustable until key
is released.
Variable Set Point, Push for Process
CV _ (A, B, C or D) _ _ _ _ _ _ _ _ _ _ B
LED Display: Indicates set point,
until the PROCESS key is pressed.
Process value (actual temperature)
is displayed until the PROCESS key
is released.
PROCESS
Set Point Knob: To increase
set point, turn knob clockwise.
To decrease set point, turn
knob counterclockwise. The
new set point is entered 3
seconds after the knob stops
moving. Set point will not
change while the PROCESS
key is pressed.
F
C
LOAD
CV
LOAD Indicator Light: Lit
when output is energized.
Finger Tip Indent: Insert
finger tip into indent for
quick and easy set point
changes.
F or C Indicator Light: Lit
to indicate if unit is configured
for degrees Fahrenheit or
degrees Celsius.
Figure 11a —
Variable Set Point,
Push for Process
Interface
Figure 11b —
Variable Set Point,
Push for Process
Interface with Tactile Keys
PROCESS Key: Press and hold
this key to display process
(actual temperature) value. Set
point is not adjustable until key
is released.
PROCESS
To adjust the Calibration Offset on models with tactile
keys, first hold down both the Increment and Decrement keys for five seconds. The display will first show
[`CAL] for five seconds, then it will display the Calibration Offset value. Adjust the value with the Increment and Decrement keys (range: -30 to 30°). The new
value will take effect three seconds after the last key
stroke. The display will blink, then return to the primary display after five seconds.
To change the temperature units on models with
tactile keys, first hold down both the Increment and
Decrement keys for ten seconds. The display will show
[F``C] for two seconds. Adjust the units with the Increment and Decrement keys. The new value will take
effect three seconds after the last key stroke. The display will blink, then return to the primary display after
five seconds. The set point value, process value and
offset will automatically adjust to the new temperature
LOAD Indicator Light: Lit
when output is energized.
Increment and Decrement Keys:
Press the Up-Arrow key to
increase the set point.
Press the Down-Arrow key to
decrease the set point.
The new set point is entered 3
seconds after the last key stroke.
The set point will not change while
the PROCESS key is pressed.
scale.
Watlow Series C • 11 • Chapter 4 User Interface
Page 14
Variable Set Point, Push to Set
CV _ (1, 2, 5 or 6) _ _ _ _ _ _ _ _ _ _ C
LED Display: Indicates
the set point.
PUSH TO SET Key:
Press and hold key to
adjust the set point
temperature. The new set
point is entered 3 seconds
after the knob stops
moving. Set point will not
change unless PUSH TO
SET key is pressed.
CV
F
C
LOAD
PUSH
TO SET
Set Point Knob: To increase
set point, turn knob clockwise.
To decrease set point, turn
knob counterclockwise. The
new set point is entered 3
seconds after the knob stops
moving.
F or C Indicator Light: Lit
to indicate if unit is configured
for degrees Fahrenheit or
degrees Celsius.
LOAD Indicator Light: Lit
when output is energized.
Finger Tip Indent: Insert
finger tip into indent for
quick and easy set point
changes.
Variable Set Point, Push to Set
CV _ (A, B, C or D) _ _ _ _ _ _ _ _ _ _ C
Figure 12a — Variable
Set Point, Push to Set Interface
Figure 12b — Variable
Set Point, Push to Set Interface with Tactile Keys
LED Display: Indicates
the set point.
PUSH TO SET Key:
Press and hold key to
adjust the set point
temperature. Set point will
not change unless PUSH
TO SET key is pressed.
PUSH TO
SET
LOAD
To adjust the Calibration Offset on models with tactile
keys, first hold down both the Increment and Decrement keys for five seconds. The display will first show
[`CAL] for five seconds, then it will display the Calibration Offset value. Adjust the value with the Increment and Decrement keys (range: -30 to 30°). The new
value will take effect three seconds after the last key
stroke. The display will blink, then return to the primary display after five seconds.
CV
F
C
F or C Indicator Light: Lit
to indicate if unit is configured
for degrees Fahrenheit or
degrees Celsius.
LOAD Indicator Light: Lit
when output is energized.
Increment and Decrement Keys:
Press the Up-Arrow key to
increase the set point.
Press the Down-Arrow key to
decrease the set point.
The new set point is entered 3
seconds after the last key stroke.
To change the temperature units on models with
tactile keys, first hold down both the Increment and
Decrement keys for ten seconds. The display will show
[F``C] for two seconds. Adjust the units with the Increment and Decrement keys. The new value will take
effect three seconds after the last key stroke. The display will blink, then return to the primary display after
five seconds. The set point value, process value and
offset will automatically adjust to the new temperature
scale.
Watlow Series C • 12 • Chapter 4 User Interface
Page 15
Variable Set Point, Push to Set
CV _ (1, 2, 5 or 6) _ _ _ _ _ _ _ _ _ _ D
LED Display: Indicates
the process value until
the Push to Set Key is
operated.
PUSH TO SET Key:
The process value (Actual
Temperature) is displayed
when this key is not
operated. When this key is
depressed, the set point is
displayed and can be
adjusted.
CV
F
C
LOAD
PUSH
TO SET
Set Point Knob: To increase
set point, turn knob clockwise.
To decrease set point, turn
knob counterclockwise. The
new set point is entered 3
seconds after the knob stops
moving.
F or C Indicator Light: Lit
to indicate if unit is configured
for degrees Fahrenheit or
degrees Celsius.
LOAD Indicator Light: Lit
when output is energized.
Finger Tip Indent: Insert
finger tip into indent for
quick and easy set point
changes.
Variable Set Point, Push to Set
CV _ (A, B, C or D) _ _ _ _ _ _ _ _ _ _ D
Figure 13a — Variable
Set Point, Push to Set Interface
Figure 13b — Variable
Set Point, Push to Set Interface with Tactile Keys
LED Display: Indicates
the process value until
the Push to Set Key is
operated.
PUSH TO SET Key:
The process value (Actual
Temperature) is displayed
when this key is not
operated. When this key is
depressed, the set point is
displayed and can be
adjusted.
PUSH TO
SET
LOAD
To adjust the Calibration Offset on models with tactile
keys, first hold down both the Increment and Decrement keys for five seconds. The display will first show
[`CAL] for five seconds, then it will display the Calibration Offset value. Adjust the value with the Increment and Decrement keys (range: -30 to 30°). The new
value will take effect three seconds after the last key
stroke. The display will blink, then return to the primary display after five seconds.
CV
F
C
F or C Indicator Light: Lit
to indicate if unit is configured
for degrees Fahrenheit or
degrees Celsius.
LOAD Indicator Light: Lit
when output is energized.
Increment and Decrement Keys:
Press the Up-Arrow key to
increase the set point.
Press the Down-Arrow key to
decrease the set point.
The new set point is entered 3
seconds after the last key stroke.
To change the temperature units on models with
tactile keys, first hold down both the Increment and
Decrement keys for ten seconds. The display will show
[F``C] for two seconds. Adjust the units with the Increment and Decrement keys. The new value will take
effect three seconds after the last key stroke. The display will blink, then return to the primary display after
five seconds. The set point value, process value and
offset will automatically adjust to the new temperature
scale.
F or C Indicator Light: Lit
to indicate if unit is configured
for degrees Fahrenheit or
degrees Celsius.
Watlow Series C • 14 • Chapter 4 User Interface
Page 17
Troubleshooting
IndicationProbable Cause(s)Corrective Action
On indicating controls, the
display is not illuminated.
• Power supply switch off.
• Fuse blown.
• Turn switch on.
• Replace fuse (check cause of failure).
Temperature reading is
incorrect, showing a sensor error, [Er;In] , or LOAD
LED is switching at the
wrong temperature.
Temperature reading is decreasing, but actual process
is increasing.
Temperature reading is
reading low and not increasing while actual process
temperature is increasing.
Temperature reading is
offset from actual process
temperature, or the output
switches on or off at the
wrong temperature. The offset changes with changes in
process temperature.
• Breaker tripped.
• Safety interlock door switch activated.
• Separate system limit control latched.
• Wiring incorrect or open.
• Power supply voltage incorrect.
• Defective controller.
• Reset breaker (check cause of failure).
• Close door.
• Reset limit controller.
• Check wiring.
• Verify input power.
• Repair or replace controller.
Troubleshooting thermocouple inputs
•
Calibration offset is incorrect (tactile
models only).
•
Settings for degree C or F is incorrect. Check model part number for degree C or F.
•
Sensor or controller 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.
• Thermocouple polarity is reversed. In
the US, red wire insulation denotes the
negative wire.
• Sensor is bad. Thermocouple is shorted.
• Copper wire was used instead of thermocouple extension wire. Connectors
of metals different than thermocouple
metal were used to splice or make connections.
Check calibration offset.
If model has Increment/Decrement keys then
C/F setting is adjustable.
• Place a jumper wire across the thermocouple input terminals. The display should
indicate ambient temperature. If it does, the
controller is OK.
For controllers without the ability to view
process temperature:
- Decrease set point below ambient temperature, LOAD LED should be off for heating
controllers and on for cooling controllers.
- Increase set point above ambient temperature. LOAD LED should be on for heating
controllers and off for cooling controllers.
• 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.
• Check thermocouple connections. Check
thermocouple wire insulation to make sure
it is not damaged, causing the wires to short
(making a new junction).
• 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 C • 15 • Troubleshooting
Page 18
IndicationProbable Cause(s)Corrective Action
Troubleshooting RTD inputs
Temperature reading is incorrect, showing a sensor error, [Er;In] , or LOAD LED
is switching at the wrong
temperature.
• Settings for degree C or F is incorrect. Check model part number for degree C or F.
• Sensor or controller may be bad. Sensor connections may be bad.
• Ambient temperature in the control
cabinet is over 70°C (158°F).
• Sensor connections may be bad. Excessive lead wire resistance.
Check calibration offset
If model has Increment/Decrement keys then
C/F setting is adjustable.
• Place a 110 ohm resistor across the sensor
input terminals. The display should indicate
25°C (77°F). If it does, the controller is OK.
Sensor or connections may be bad.
For controllers without the ability to view
process temperature:
- Decrease set point below ambient temperature, LOAD LED should be off for heating
controllers and on for cooling controllers.
- Increase set point above ambient temperature. LOAD LED should be on for heating
controllers and off for cooling controllers.
• Measure temperature in cabinet to ensure
it is below 70°C (158°F). Vent cabinet or add
fans if necessary.
• Check sensor connections. Measure lead
wire resistance. There will be a 2.6°C (4.7°F)
error for every ohm of lead wire resistance.
Troubleshooting controller outputs
Controller output signal is
not on when it should be.
Load LED is not on.
Controller output signal is
not on when it should be.
Load LED is on.
Control output signal is on
when it should not be on.
Load LED is on.
Load is on when it should
not be on. Load LED is off.
• Temperature reading is incorrect on
display of indicating controls or limit.
See input troubleshooting.
•
Set point is not set correctly.
• Output wiring is incorrect.• Verify wiring. Relay outputs act as a
• Temperature reading is incorrect on
display of indicating controls or limit.
see input troubleshooting.
• Set point is not set correctly.• Verify set point setting.
• Control output is defective.• Repair or replace controller.
• Power switching device (SSR, HG
relay, mechanical relay) is shorted. Controller outputs shorted.
• Output wiring is incorrect.• Verify wiring.
• See input troubleshooting.
• Verify set point setting.
switch, they do not source power.
For DC output controls, voltage should be
about 20VDC with no load. Greater than 5
volts with load of 500 Ω or greater.
• See input troubleshooting.
• Remove wires from output of control to input of power switching device. If load is still
on, replace power switching device. If load
turns off, replace controller or sensor. See input troubleshooting.
Watlow Series C • 16 • Troubleshooting
Page 19
Specifications
Controller
• Microprocessor based, on-off control mode.
• Nominal switching hysteresis, typically 1.7°C (3°F).
• Input filter time: 1 second
Operator Interface (model dependent)
• Four digit , 7 segment LED displays, .28" high.
• °F or °C indicator LED.
• LOAD indicator LED.
• Continuous turn, velocity sensitive rotary encoder for set
point adjustment, on rotary-knob models.
• Front panel key on Push for Set Point or Push for Process options.
• No operator interface on fixed set point models.
• Increment/Decrement keys for set point adjustment on
tactile key models.
Standard Conditions For Specifications
• Rated line voltage, 50 to 60Hz, 0 to 90% RH non-condensing, 15-minute warm-up.
• 250 nV input referenced error per 1Ω source resistance.
RTD
• 2-wire or 3-wire platinum, 100 Ω
• DIN curve (.00385 curve)
• 125 μA nominal RTD excitation current
Input Accuracy Span Range
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
Thermocouple Input
• 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° (-328 to 32°F)
• Temperature stability: ±0.3 degree per degree change in
ambient.
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
Output Types
• Supply voltage maximum: 24VÎ (dc) into an infinite load.
• Supply voltage minimum: 5VÎ (dc) at 10 mA
• Minimum load impedance: 500 Ω
• 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
• UL®873 Recognized Temperature Controller and Indica-
• NEMA 4X/IP65 on panel mount package options with
• UL®197 Reviewed for use in cooking appliances.
• W.E.E.E; CE - See Declaration of Conformity.
• ANSI Z21.23 Gas Appliance Thermostat approval.
• Temperature Control and Indicator CSA 22.2 No. 24.
• RoHS Directive (2002-95-EC)
Terminals
• 6.4 mm (0.25 in) quick connect, push-on termi-
• Removable screw clamp style terminal blocks. See
• Wire gauge 0.1 to 4 mm2 (30 to 12 AWG). Strip
• Torque: 0.8 Nm (7 in-lb) maximum.
Power
• 24VÅ (ac) +10%; -15%; 50/60 Hz, ±5%
• 120VÅ (ac) +10%; -15%; 50/60 Hz, ±5%
• 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)
*Depth including DIN rail, 94.7 mm (3.73 in)
Note: These specifications are subject to change without
prior notice.
Switched DC (non-isolated)
Electromechanical Relay, Form C
tor. File E43684.
tactile keys for set point.
nals. See order options. Refer to Wiring section for
crimp-on terminal recommendations.
order options.
length, 8 mm (0.30 in).
StyleWidthHeightDepth
Open board61.7 mm
Potted70.1 mm
DIN Rail78.1 mm
Square 1/8
DIN Panel
(2.43 in)
(2.76 in)
(3.08 in)
72.4 mm
(2.85 in)
61.7 mm
(2.43 in)
102.9 mm
(4.05 in)
112.3 mm
(4.42 in)
72.4 mm
(2.85 in)
45.1 mm
(1.78 in)
46.6 mm
(1.84 in)
90.7 mm*
(3.57 in)
Behind panel
51.7 mm
(2.04 in)
Watlow Series C • 17 • Specifications
Page 20
Ordering Information and Model Numbers
On-off controller, No user interface
Set Point Type
FFixed Set Point
Line Voltage and Output
B
C
D
E
F
G
Controller Package
1Panel Mount, 1/8 DIN Square -Spade Terminals
2DIN Rail Mount -Spade Terminals
3Open Board, not potted -Spade Terminals
4Potted Case -Spade Terminals
5Panel Mount, 1/8 DIN Square -Screw Terminals
6DIN Rail Mount -Screw Terminals
7Open Board, not potted -Screw Terminals
Sensor and Sensor Operating Range
HType J -346 to 1900 Degrees F
JType J -210 to 1038 Degrees C
KType K -454 to 2500 Degrees F
LType K -270 to 1370 Degrees C
MType T -454 to 750 Degrees F
NType T -270 to 400 Degrees C
P100 Ω RTD -328 to 1472 Degrees F
R100 Ω RTD -200 to 800 Degrees C
SType E -328 to 1470 Degrees F
TType E -200 to 800 Degrees C
Control Mode
HHeat
CCool
Fixed Set Point Value *
XXXXControl Set Point Value**
Overlay/Custom Options
AStandard
120VÅ (ac), Switched DC Output
120VÅ (ac), 8 Amp Relay Output
230 to 240VÅ (ac), Switched DC Output
230 to 240VÅ (ac), 8 Amp Relay Output
24VÅ (ac), Switched DC Output
24VÅ (ac), 8 Amp Relay Output
CF________AAAA_
*Note: Set point must fall within the sensor operating range.
**Note: A (-) is used in the left digit of the operating range to indicate negative temperature values.
Watlow Series C • 18 • Ordering Information
Page 21
Ordering Information and Model Numbers
On-off controller, LED Display
Set Point Type
VVariable Set Point
Line Voltage and Output
B
C
D
E
F
G
Controller Package
1Panel Mount, 1/8 DIN Square, Rotary Knob -Spade Terminals
2DIN Rail Mount, Rotary Knob -Spade Terminals
5Panel Mount, 1/8 DIN Square, Rotary Knob -Screw Terminals
Overlay/Custom Options (A through D contain the Watlow Logo on the overlay; 1 through 4 do not have the Watlow Logo on the overlay)
AStandard, displays set point only. Set point is adjustable from default display.
BDisplays set point, and set point is adjustable. Press Process Key to display process.
CDisplays set point. Press Push to Set Key, to allow set point to be adjusted.
DDisplays process. Press Push to Set Key, to allow set point to be adjusted.
1Standard, displays set point only. Set point is adjustable from default display.
2Displays set point, and set point is adjustable. Press Process Key to display process.
3Displays set point. Press Push to Set Key, to allow set point to be adjusted.
4Displays process. Press Push to Set Key, to allow set point to be adjusted.
120VÅ (ac), Switched DC Output
120VÅ (ac), 8 Amp Relay Output
230 to 240VÅ (ac), Switched DC Output
230 to 240VÅ (ac), 8 Amp Relay Output
24VÅ (ac), Switched DC Output
24VÅ (ac), 8 Amp Relay Output
CV_____________
*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 temperature values.
Watlow Series C • 19 • Ordering Information
Page 22
Ordering Information and Model Numbers
Temperature Indicator
Line Voltage and Output
B
D
F
Controller Package
1Panel Mount, 1/8 DIN Square -Spade Terminals
2DIN Rail Mount -Spade Terminals
5Panel Mount, 1/8 DIN Square -Screw Terminals
6DIN Rail Mount -Screw Terminals
ANEMA 4X Panel Mount, Spade Terminals
CNEMA 4X Panel Mount, Screw Terminals
Sensor and Sensor Operating Range
HType J -346 to 1900 Degrees F
JType J -210 to 1038 Degrees C
KType K -454 to 2500 Degrees F
LType K -270 to 1370 Degrees C
MType T -454 to 750 Degrees F
NType T -270 to 400 Degrees C
P100 Ω RTD -328 to 1472 Degrees F
R100 Ω RTD -200 to 800 Degrees C
SType E -328 to 1470 Degrees F
TType E -200 to 800 Degrees C
Overlay/Custom Options
AStandard with Watlow Logo
1Standard without Watlow Logo
120VÅ (ac)
230 to 240VÅ (ac)
24VÅ (ac)
TM___AAAAAAAAA_
Watlow Series C • 20 • Ordering Information
Page 23
Declaration of Conformity
Series C and Series TM
Watlow Winona, Inc.
1241 Bundy Blvd.
Winona, MN 55987 USA
Declares that the following product:
Designation: Series C and Series TM
Model Numbers: CF – (B, C, D, E, F or G)(1, 2, 3 ,4, 5, 6 or 7)(any letter)(H or C) – (any
four numbers or – and three numbers) – (AAAA) – may be followed by
additional numbers or letters
CV – (B, C, D, E, F or G)(1, 2, 5, 6, A, B, C or D)(any letter)(H or C) –
(any four numbers or – and three numbers) – (any four numbers) – may
be followed by additional numbers or letters
TM – (B, D or F)(1, 2, 5 or 6)(any letter)(A) – (AAAA) – (AAAA) – may
be followed by additional numbers or letters
Classification: CF and CV = Temperature control, TM = Indicator
Installation Category II, Pollution degree 2
Rated Voltage: 24 V, 120 V, 230/240 V~ (ac)
Rated Frequency: 50/60 Hz
Rated Power Consumption: 10 VA maximum
Meets the essential requirements of the following European Union Directives by using the
relevant standards show below to indicate compliance.
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 Interrupts and Variations - Immunity
EN 61000-3-2: ED.2. 2000 Harmonic Current Emissions – Class A equipment.
EN 61000-3-3:1995 + A1:1998 Voltage Fluctuations and Flicker
EN 60730-1:2000 +A11:2002 and
EN 60730-2-9:2002
CXX4 units
EN 61010-1:2001
All other units
Meets the European Union Limits for hazardous material content as defined by:
2002/95/EC RoHS Reduction of Hazardous Substances Directive
2002/96/EC W.E.E.E Waste Electrical and Electronic Equipment Directive.
Equipment contains metals and Polycarbonate enclosure and every
effort shall be made to recycle and recover these materials.
Electrical equipment for measurement, control and lab-oratory
use – EMC requirements (Industrial Immunity, Class B
Emissions).
2006-95-EC Low-Voltage Directive
Automatic electric controls for household and similar use:
Particular requirements for temperature sensing controls.
Safety Requirements of electrical equipment for measurement,
control and laboratory use. Part 1: General requirements
Page 24
Declaration of Conformity
Raymond D. Feller III Winona, Minnesota, USA
Name of Authorized Representative Place of Issue
General Manager February 2008
Title of Authorized Representative Date of Issue
Signature of Authorized Representative
Page 25
How to Reach Us
Corporate Headquarters
Watlow Electric Manufacturing Company
12001 Lackland Road
St. Louis, MO 63146
Sales: 1-800-WATLOW2
Manufacturing Support: 1-800-4WATLOW
Email: info@watlow.com
Website: www.watlow.com
From outside the USA and Canada:
Tel: +1 (314) 878-4600
Fax: +1 (314) 878-6814
Latin America
Watlow de México S.A. de C.V.
Av. Fundición No. 5
Col. Parques Industriales
Querétaro, Qro. CP-76130
Mexico
Tel: +52 442 217-6235
Fax: +52 442 217-6403
Watlow Japan Ltd.
1-14-4 Uchikanda, Chiyoda-Ku
Tokyo 101-0047
Japan
Tel: +81-3-3518-6630 Fax: +81-3-3518-6632
Email: infoj@watlow.com Website: www.watlow.co.jp
Revised: September 20, 2007
info@watlow.cnWebsite: www.watlow.cn
Watlow Ibérica, S.L.U.
CME - Avda. de la Vía Láctea, s/n. Oficina 24
28830 - San Fernando de Henares Madrid
Spain
Tel: +34.91.675.1292
Fax: +34.91.648.7380
Email: info@watlow.es
Website: www.watlow.es
Watlow UK Ltd.
Linby Industrial Estate
Linby, Nottingham, NG15 8AA
United Kingdom
Telephone: (0) 115 964 0777
Fax: (0) 115 964 0071
Email: info@watlow.co.uk
Website: www.watlow.co.uk
From outside The United Kingdom:
Tel: +44 115 964 0777
Fax: +44 115 964 0071
Watlow Korea Co., Ltd.
#1406, E&C Dream Tower, 46, Yangpyeongdong-3ga
Yeongdeungpo-gu, Seoul 150-103
Republic of Korea
Tel: +82 (2) 2628-5770 Fax: +82 (2) 2628-5771
Website: www.watlow.co.kr
Watlow Malaysia Sdn Bhd
No. 14-3 Jalan 2/114
Kuchai Business Centre
Jalan Kuchai Lama
58200 Kuala Lumpur
Malaysia
Tel: +60 3 7980 7741 Fax: +60 3 7980 7739