Red Lion ITMS - Manual (Page 4)

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
2 B-
3 A+
4 COMM
5 TXEN
6
2 3 4 5
Not used
ITMS CONNECTOR
STEP 1 WIRING THE MODULE
STEP 2 INSTALLING SFIMS (Software for Intelligent Modules)
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