beautypg.com

Wiring a serial eia-485 network, Watlow ez-zone, Pm integrated controller – Watlow EZ-ZONE PM Integrated Controller User Manual

Page 43: Chapter 2 install and wire, Warning

background image

Watlow EZ-ZONE

®

PM Integrated Controller

40

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.

- A

+ B

com

98
99

CC
CA
CB

B5
D6
D5

power

- A

+ B

common

power

- A

+ B

common

power

power

power

power

EZ-ZONE PM

EZ-ZONE ST

ST_ _ - (B or F) _

M _ -_ _ _ _

PLC

98

99

CC

CA

CB

B5

D6

D5

Power

Supply

fuse

EZ-ZONE RM

98

99

Slot C

power

CZ

CB

CX

CY

CA

CC

- A

+ B

common

- A

+ B

com

- A

+ B

common

power

- A

+ B

common

power

power

power

EZ-ZONE PM

EZ-ZONE ST

ST_ _ - (B or F) _ M _ -_ _ _ _

98

99

CF

CD

CE

B5

D6

D5

Power

Supply

fuse

EZ-ZONE RM

98

99

Slot C

power

CZ

CE

CX

CY

CD

CF

- A

+ B

common

98
99

CF
CD
CE
B5
D6
D5

98
99

CF
CD
CE

RUI/Gateway

EZKB-_ A _ _- _ _ _ _

Do not route network wires with pow-

er wires. Connect network wires in

daisy-chain fashion when connecting

multiple devices in a network.

A termination resistor may be re-

quired. Place a 120 Ω resistor across

T+/R+ and T-/R- of the last controller

on a network.

Only one protocol per port is avail-

able at a time: either Modbus RTU or

Standard Bus.

Wiring a Serial EIA-485 Network

A network using Watlow's Standard Bus and an RUI/Gateway .

A network with all devices configured using Modbus RTU .