Watlow EZ-ZONE RMC Manual de usuario descargar pdf (Pagina 27)

Warning: ç

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 pe-

ripheral 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

(30 to 12 AWG)

single-wire termination or two 1.31

(16 AWG)

• 0.8 Nm (7.0 in-lb.) torque

Note:

Adjacent terminals may be labeled

differently, depending on the model

number.

Note:

To prevent damage to the controller,

do not connect wires to unused ter-

minals.

Note:

Maintain electrical isolation between

digital input-outputs, switched dc/open

collector outputs and process outputs

to prevent ground loops.

Note:

If the last two digits of the part number

are "12", this equipment is suitable for

use in CLASS I, DIVISION 2, Groups A,

B, C and D or Non-Hazardous locations

only. Temperature Code T4

Warning: ç

Explosion Hazard – Substitution of

component may impair suitability for

CLASS I, DIVISION 2.

Warning: ç

Explosion Hazard - Do not disconnect

while the circuit is live or unless the

area is known to be free of ignitable

concentrations of flammable sub-

stances.

Watlow EZ-ZONE

RMC Module • 24 • Chapter 2 Install and Wire

Warning: ç

Explosion Hazard - Dry contact closure

Digital Inputs shall not be used in Class

I Division 2 Hazardous Locations unless

switch used is approved for this ap-

plication.

Input 1, 2, 3, 4 Potentiometer RMC Part # Digits 4, 6, 8, 10

Slot A, B, D, E

CCW

• Use a 1 kΩ potentiometer.

Input 1: RMC(1,3,5)xxxxxxxxxxx (S1/R1)

Input 2: RMCxx(1,5)xxxxxxxxx (S2/R2)

Input 3: RMCxxxx(1,5)xxxxxxx (S3/R3)

Input 4: RMCxxxxxx(1,5)xxxxx (S4/R4)

Input 1, 2, 3, 4 Current Transformer RMC Part # Digits 4, 6, 8, 10

Slot A, B, D, E

• Input range is 0 to 50 mA (ac).

• Current transformer part number: 16-0246

• 100 Ω input impedance

• Response time: 1 second maximum

• Accuracy +/-1 mA typical

Input 1: RMC(7)xxxxxxxxxxx (T1/S1)

Input 2: RMCxx(7)xxxxxxxxx (T2/S2)

Input 3: RMCxxxx(7)xxxxxxx (T3/S3)

Input 4: RMCxxxxxx(7)xxxxx (T4/S4)

Example: Using a Current Transformer

Controller

Output N

CT Input

L2 L1

Fuse

SSR

3A x 4

12A

48mA

12A

x 4 = 48A

Turns around CT

CT Primary Current

CT Secondary Current

Total current

CT Ratio R = 1000:1

Is = IpT/R = 50mA

CSC = Ip(full scale) = 50mA(R)/T

CSI = Output N

= Current in secondary of current transformer

p = Current in primary of current transformer

T = Number of turns through the primary of the transformer

R = Number of turns in the secondary of the current

transformer (Turns ratio, assuming one primary turn)

CSC = Current Scaling (parameter found in Current Menu

of Setup Page)

CSI = Current Source Instance (parameter found in Current

Menu of Setup Page)

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Watlow EZ-ZONE RMC Manual de usuario Pagina 27

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