Rockwell Automation 1771-IR , D17716.5.76 RTD INPUT MODULE - Manual (Page 14)

Installing the RTD Input Module
Chapter 3
3Ć3
Figure 3.1
Keying Positions for the RTD Input Module
2
4
6
8
1 0
1 2
1 4
1 6
1 8
2 0
2 2
2 4
2 6
2 8
3 0
3 2
3 4
3 6
Keying Bands
Upper Connector
12934
Between 10 and 12
Between 28 and 30
Connect your I/O devices to the field wiring arm shipped with the module (see
Figure 3.2). Attach the field wiring arm to the pivot bar at the bottom of the I/O
chassis. The field wiring arm pivots upward and connects with the module so
you can install or remove the module without disconnecting the wires.
The wiring arms are specific to the input module. The RTD input module uses
field wiring arm cat. no. 1771–WF.
Use the inputs in numerical sequence from 1 to 6. Unused inputs that are left
open cause the module to report an open input condition. To avoid this, tie all
three terminals of the open channel together. Wiring connections are shown in
Figure 3.2.
The module requires three–conductor shielded cable for signal transmission
from RTD devices. This cable consists of three insulated conductors, covered
along their entire length by a foil shield and encased in plastic. The shield
reduces the effect of induced noise at any point along the cable. In order to do
this, the shield must cover the enclosed wires as completely as possible.
Connecting Wiring