Rockwell Automation 1771-IE,D17716.5.7 ANAL.INPUT MOD. - Manual (Page 14)

Installing the Analog Input Module
Chapter 3
3Ć4
To key a module slot to accept only the 1771-IE module, position the
keying bands on the upper backplane connector at the following positions
(Figure 3.1):
between 4 and 6
between 26 and 28
Figure 3.1
Keying Positions
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
14169
Keying
Bands
Connect analog devices and external power to your input module through
the Field Wiring Arm (cat. no. 1771-WB). The wiring arm pivots on the
front of the I/O chassis to connect with the module. Wiring connections
are made at the wiring arm, so you can remove the module from the
chassis without disconnecting the wiring.
Connection diagram (Figure 3.2) shows connections of analog devices
and power supply to the wiring arm of the input module.
The COMMON terminal on the wiring arm connects to the power supply
COMMON and SIGNAL RETURN wires from each of your input
devices (Figure 3.2). Do not confuse the SIGNAL RETURN wire with
the cable shield. The SIGNAL RETURN is one of the insulated wires of
the cable-twisted pair. The cable shield is discussed in the next section.
When wiring analog devices to the wiring arm, use Belden No. 8761 or an
equivalent cable. We recommend that the cable from voltage mode input
devices does not exceed 50 feet in length. We base this recommendation
on considerations of noise immunity in typical industrial environments.
Wiring