Watlow EZ-ZONE RM-Scanner-Modul Manual de usuario descargar pdf (Pagina 31)

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.

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

RMS Module • 28 • Chapter 2 Install and Wire

Quencharc Wiring Example

• In this example the Quencharc

circuit (Watlow part# 0804-0147-

0000) is used to protect internal

circuitry from the counter elec-

tromagnetic force from the induc-

tive user load when deenergized.

It is recommended that this or

an equivalent Quencharc be used

when connecting inductive loads

to outputs.

Quencharc

User Load

Standard Bus EIA-485 Communications

T-/R-

common

Slot C

T+/R+

98 99 CF CD CE CZ CX CY

• Wire T-/R- to the A termi-

nal of the EIA-485 port.

• Wire T+/R+ to the B termi-

nal of the EIA-485 port.

• Wire common to the com-

mon terminal of the EIA-

485 port.

• Do not route network

wires with power wires.

Connect network wires in

daisy-chain fashion when

connecting multiple de-

vices in a network.

• A 120 Ω termination resis-

tor may be required across

T+/R+ and T-/R-, placed on

the last controller on the

network.

• Do not connect more than

16 EZ-ZONE RM control-

lers on a network.

• maximum network length:

1,200 meters (4,000 feet)

• 1/8th unit load on EIA-485

bus

RMSx-xxxx-x(A)xx

* All models include Standard

Bus communications

Modbus RTU or Standard Bus EIA-485 Communications

T-/R-

common

Slot C

T+/R+

98 99 CC CA CB CZ CX CY

• Wire T-/R- to the A termi-

nal of the EIA-485 port.

• Wire T+/R+ to the B termi-

nal of the EIA-485 port.

• Wire common to the com-

mon terminal of the EIA-

485 port.

• Do not route network wires

with power wires. Connect

network wires in daisy-

chain fashion when con-

necting multiple devices in

a network.

• A termination resistor may

be required. Place a 120 Ω

resistor across T+/R+ and

T-/R- of last controller on

network.

• Only one protocol per port

is available at a time: ei-

ther Modbus RTU or Stan-

dard Bus.

• Do not connect more than

16 EZ-ZONE controllers on

a Standard Bus network.

• Maximum number of EZ-

ZONE controllers on a

Modbus network is 247.

• maximum network length:

1,200 meters (4,000 feet)

• 1/8th unit load on EIA-485

bus

RMSx-xxxx-x(1)xx

Modbus-IDA

Terminal

EIA/TIA-485 Name Watlow Terminal

Label

Function

DO A CA or CD T-/R-

D1 B CB or CE T+/R+

common common CC or CF common

Note:

Do not leave a USB to EIA-485 converter connected to Standard Bus with-

out power (i.e., disconnecting the USB end from the computer while leaving

the converter connected on Standard Bus). Disturbance on the Standard

Bus may occur.

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