Rockwell Automation 1771-IXHR , D17716.5.80 HIGH RESOL.THERMOCOUPLE - Manual (Page 15)

Installing the High Resolution
Thermocouple/Millivolt Input Module
Chapter 3
3Ć4
Figure 3.2
Connection Diagram for the 1771-IXHR Inputs
+
+
–
–
1
Do not use
Short circuit
unused pins
Channel 1
Channel 2
18 Input 1 (+ lead)
17 Input 1 (- lead)
16 Input 2 (+ lead)
15 Input 2 (- lead)
14 Input 3 (+ lead)
13 Input 3 (- lead)
12 Input 4 (+ lead)
11 Input 4 (- lead)
10 Not Used
9 Not used
8 Input 5 (+ lead)
7 Input 5 (- lead)
6 Input 6 (+ lead)
5 Input 6 (- lead)
4 Input 7 (+ lead)
3 Input 7 (- lead)
2 Input 8 (+ lead)
1 Input 8 (- lead)
Terminal Identification
Terminal Function
Wiring Arm
Cat. No. 1771-WI
Connect positive thermocouple leads
to even-numbered terminals, negative
leads to odd-numbered terminals.
Ground cable shield to I/O chassis mounting bolt.
18
17
16
1
15
14
13
12
11
10
9
8
7
6
5
4
3
2
10527-I
Do not connect an input to terminals 9 and 10. They are reserved for the cold
junction temperature sensor inside the wiring arm. Short circuit unused input
terminals by connecting a jumper wire between the positive and negative input
terminals of each unused channel. Refer to appendix A to determine maximum
cable length.
When using shielded cable or shielded thermocouple extension wire, ground the
foil shield and drain wire only at one end of the cable. We recommend that you
wrap the foil shield and drain wire together and connect them to a chassis
mounting bolt (Figure 3.3). At the opposite end of the cable, tape exposed
shield and drain wire with electrical tape to insulate it from electrical contact.
Grounding the Input Modules