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Watlow Controls 

EHG CL User’s Guide

Wiring the Series EHG CL Power, Thermocouple and 
Heater Connections

View looking at the top of the controller.

L1 

(black) 

L2 

(white) 

4

8

L1

(black)

L2

(white)

Power and relay connectors

6.0” +/-0.5” relaxed length

>= 18” extended length

3.5” +/- 0.5” 

Control Power Cord Coiled, Terminated Long

Part Number: 4800-0022

3.5” +/- 0.5”

12.0” +/- 1” Relaxed Length

>= 36” Extended Length

Control Power Cord Coiled, Jumpered Long

Part Number: 4800-0012

Control Power Cord Coiled, Jumpered Short

Part Number: 4800-0011

3.5” +/- 0.5”

7.0” +/- 1” Relaxed Length

3.5” +/- 0.5”

3.5” +/- 0.5” 

Relaxed Length

Control Power Cord Coiled, Terminated Short

Part Number: 4800-0021

With the control facing you this connector is on the 
right side.

L1

Switched 

(black)

L2

(white)

+ (yellow)

– (red)

+ (yellow)

– (red)

1

3

4

5

7

8

6

2

Heater

Limit 

Thermocouple

Process 
Thermo-
couple

Thermocouple and heater connector

81.5 mm

(3.210 in)

48.4 mm

(1.905 in)

Interface

front

24.7 mm

(0.974 in)

Interface

side

88.8 mm

(3.496 in)

55.8 mm

(2.196 in)

Base Controller with Interface

front

63.6 mm

(2.503 in)

Base Controller with 

Interface side

Panel Mount Dimensions

45.72 mm

(1.800 in)

drill and tap for #8-32

Mounting Bracket

The Series EHG CL 
mounting 

bracket lets 

you mount the con-
troller in any of four 
angles. After discon-
necting both wiring 
connectors, gently 
rotate the controller 
counterclockwise until 
it unlocks from the 
mounting bracket. 
Re-orient the control-
ler on the mounting 
bracket and gently ro-
tate it clockwise until 
it locks.

Summary of Contents for EHG CLseries

Page 1: ...erature controller and safety limit Process temperature output 10 amp NO ARC relay Safety limit 10 amp relay On off and PID temperature control algorithm Up graded via communications to PID algorithm...

Page 2: ...to 0 C 32 F to SLA setting 150 C 302 F 34 unsigned integer RWE No Dis play Heat Output Power Read via Modbus communications the present heat output power level 0 to 100 0 22 unsigned integer R No Dis...

Page 3: ...19 200 16 384 38 400 17 9 600 16 unsigned integer RWE tU tU Temperature Units Select the temperature scale F F 4 C C 5 C 17 unsigned integer RWE rpp rPP Restore Programmed Parameters Restore factory...

Page 4: ...on on off off Ambient Alarm Abt 85 C on on off off Health Check Error Normal Operating Range Limit High Set Point SLA Closed Loop Set Point Closed Loop Set Point Temperature Alarm Hysteresis Alarm Hys...

Page 5: ...1 507 494 5656 E12 CPU Clock Error Clock frequency is 5 MHz or 13 1 MHz Contact Technical Support at 1 507 494 5656 E13 Stack Over ow Stack has over owed Contact Technical Support at 1 507 494 5656 E1...

Page 6: ...l is cleared when the process value is outside of the proportional band Integral Int is measured in minutes per repeat A low integral value causes a fast integrating action Proportional plus Integral...

Page 7: ...r 4800 0021 With the control facing you this connector is on the right side L1 Switched black L2 white yellow red yellow red 1 3 4 5 7 8 6 2 Heater Limit Thermocouple Process Thermo couple Thermocoupl...

Page 8: ...parts which upon examination prove to be defective within the warranty period specified This warranty does not apply to damage resulting from transportation alteration misuse or abuse WARNING To avoi...

Page 9: ...nity EN 61000 4 4 2011 Electrical Fast Transient Burst Immunity EN 61000 4 5 2006 Surge Immunity EN 61000 4 6 2008 Conducted Immunity EN 61000 4 8 2009 Power frequency magnetic field immunity EN 61000...

Page 10: ...ebsite www watlow co uk From outside The United Kingdom Tel 44 115 964 0777 Fax 44 115 964 0071 Asia and Paci c Watlow Singapore Pte Ltd 16 Ayer Rajah Crescent 06 03 04 Singapore 139965 Tel 65 6773 94...

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