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Input 1, 2 process, Input 1,2 potentiometer, Input 1, 2 thermistor – Watlow EZ-ZONE PM Integrated Controller User Manual

Page 30: Input 2 current transformer

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Watlow EZ-ZONE

®

PM Integrated Controller

27

Chapter 2 Install and Wire

Warning:

Óç

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:

Maximum wire size termination and

torque rating:

• 0.0507 to 3.30 mm

2

(30 to 12

AWG) single-wire termination or

two 1.31 mm

2

(16 AWG)

• 0.8 Nm (7.0 lb.-in.) torque

Note:

Adjacent terminals may be labeled

differently, depending on the model

number.

Note:

To prevent damage to the control-

ler, do not connect wires to unused
terminals.

Note:

Maintain electrical isolation between

analog input 1, digital input-outputs,

switched dc/open collector outputs

and process outputs to prevent
ground loops.

Note:

The control output common termi-

nal and the digital common terminal

are referenced to different voltages

and must remain isolated.

Note:

This Equipment is suitable for use in

CLASS I, DIVISION 2, Groups A, B,

C and D or Non-Hazardous locations
only. Temperature Code T4A

Warning:

ç

Explosion Hazard - Dry contact clo-

sure Digital Inputs shall not be used

in Class I Division 2 Hazardous Loca-

tions unless switch used is approved
for this application.

Warning:

ç

Explosion Hazard – Substitution of

component may impair suitability

for CLASS I, DIVISION 2.

Warning:

ç

Explosion Hazard - Do not discon-

nect while the circuit is live or

unless the area is known to be free

of ignitable concentrations of flam-

mable substances.

Input 1, 2 Process

-

+

S_
R_

volts

Slot A, B

-

+

T_
S_

amperes

Slot A, B

• 0 to 20 mA @ 100 Ω input impedance
• 0 to 10VÎ (dc) @ 20 kΩ input impedance
• 0 to 50 mVÎ (dc) @ 20 kΩ input impedance
• scalable
Input 1: PM _ [C,R,B

*

] _ _ _ - _ _ _ _ _ _ _ (-S1/+R1),(+T1/-S1)

Input 2: PM _ _ _ _ _ - _ [C,R,L] _ _ _ _ _ (-S2/+R2),(+T2/-S2)

*PM(4, 8 and 9) only

Input 1,2 Potentiometer

S_
R_

Slot A, B

CW

CCW

• Use a 1 kΩ potentiometer.
Input 1: PM _ [C,R,B

*

] _ _ _ - _ _ _ _ _ _ _ (S1/R1)

Input 2: PM _ _ _ _ _ - _ [C,R,L] _ _ _ _ _ (S2/R2)

*PM(4, 8 and 9) only

Input 1, 2 Thermistor

S_
R_

Slot A, B

• >20 MΩ input impedance
• 3 microampere open-sensor detection
Input 1: PM _ [J,N,E] _ _ _ _-_ _ _ _ _ _ _ (S1/R1)
Input 2: PM _ _ _ _ _ - _ [J,P,M] _ _ _ _ _ (S2/R2)

Input 2 Current Transformer

current transformer

(input 2)

T2
S2

Slot B

• Input range is 0 to 50 mA.
• current transformer part number: 16-0246
• 100 Ω input impedance
• response time: 1 second maximum
• accuracy +/-1 mA typical
PM _ _ _ _ _ - _ [T] _ _ _ _ _

Note:

For input 1, option E is available with PM4, 8
and 9 models only.