4

WIRING CONNECTIONS

All conductors should meet voltage and current ratings for each terminal.

Also, cabling should conform to appropriate standards of good installation, local

codes and regulations. When wiring the module, use the numbers on the label to

identify the position number with the proper function. Strip the wire, leaving

approximately 1/4" (6 mm) of bare wire exposed. Insert the wire into the

terminal, and tighten the screw until the wire is clamped tightly. (Pull wire to

verify tightness.) Each terminal can accept up to one #14 AWG (2.55 mm), two

#18 AWG (1.02 mm), or four #20 AWG (0.61 mm) wires.

MODULE POWER CONNECTIONS

AC module power is connected to terminals 1 and 2. DC module power is

connected with (+) to terminal 1 and (-) to terminal 2. For best results, the power

should be relatively “clean” and within the specified limits. Drawing power

from heavily loaded circuits or from circuits that also power loads that cycle on

and off should be avoided. It is recommended that power supplied to the module

be protected by a fuse or circuit breaker.

INPUT CONNECTIONS

Thermocouple Input

Thermocouple leads are connected to terminals 11 (+) and 12 (-).

RTD Input

For 3-wire RTD elements, connect the sense leads to terminals 11 and 12. The

excitation lead is connected to terminal 10 (EXC).

For 2-wire RTD elements, connect the sense leads to terminals 11 and 12.

Install a copper sense lead of the same gauge and length as the RTD leads.

Attach one end of the wire at the probe and the other end to terminal 10.

Complete lead wire compensation is obtained. This is the preferred method. If a

sense wire is not used, then Terminal 11 should be shorted to terminal 10. A

temperature offset error will exist. The error may be compensated by

programming a temperature offset.

RELAY OUTPUT CONNECTIONS

Relay 1

Relay 1 is a Form A output relay. Wiring is connected between terminal 9

(COMM.) common and terminal 8 (N.O.) the normally open contact.

Relay 2

Relay 2 is a Form C output relay. Wiring is connected between terminal 4

(COMM.) common and either terminal 5 (N.O.), the normally open contact, or

terminal 3 (N.C.), the normally closed contact.

To prolong contact life and suppress electrical noise interference due to the

switching of inductive loads, it is good installation practice to install a snubber

across the contacts. Follow the manufacturer’s instructions for installation.

Note: Snubber leakage current can cause some high impedance loads to be held ON.

DEFAULT SERIAL SETTING CONNECTION

If the ITMS settings are unknown, or forgotten, they can be reset to the

factory defaults by connecting the Serial Default terminal 7 to Input Comm.

terminal 12 with a jumper, and then cycling power.

Defaults:

USER INPUT CONNECTION

The user input is activated when terminal 6 is pulled low (connected to Input

Comm. terminal 12).

RS485 SERIAL CONNECTIONS

There are two RJ-11 connectors located on the bottom for paralleling

communications. For single device communications, either connector can be

used. When used in conjunction with Red Lion Control Paradigm HMI products,

reverse A+ and B- wiring.

RJ11

ITMS

1

Not used

2B-

3A+

4

COMM

5

TXEN

6

2 345

Not used

ITMS CONNECTOR

STEP 1 WIRING THE MODULE

Insert the SFIMS diskette into the A: or B: drive. Then Run A:\SETUP

(or B:\SETUP) to install RLCPro onto the hard drive. An icon labeled

RLCPro will be created under the group RLCPro.

Protocol:

RTU

8

Data Bits:

Address:

247

none

Parity:

Baud Rate: 9600