Field wiring – Rockwell Automation T7488/T7488A ICS Regent+Plus Monitored Guarded Output Modules User Manual
Page 12
Monitored Guarded Output Modules (T7481/81A, 84, and 88/88A)
1 2 (Issue 2)
Industrial Control Services
However, care should be exercised in applying the module to
small load devices.
Off-state test current (Leakage current ) of the output circuit
may prevent some load devices from turning off completely.
Table 2 lists the off-state voltages (worst case) for various load
ratings and module configurations. These should be
compared to the “guaranteed off” voltage for the load device
being applied.
Table 2. Off-State Voltage Ratings.
Load
OFF State Voltage (nominal field voltage and shorted switch)
Rating
T7481/81A (24 Vdc)
T7484 (110 Vac)
T7488/88A (120 Vdc)
(mA)
Single
Dual
Single
Dual
Single
Dual
5
na
2.6
na
3.7
na
na
na
12.8
na
18.3
10
na
1.4
na
2.0
na
na
na
6.8
na
9.9
20
4.7
.71
6.4
1.0
23.5
31.8
na.
3.5
na
5.2
35
3.0
.41
4.1
.6
14.8
20.8
17.5
2.0
24.4
3.0
50
2.2
.29
3.1
.43
10.8
15.5
12.8
1.4
18.2
2.1
100
1.2
.15
1.7
.21
5.7
8.4
6.7.
.71
9.8
1.0
Field Wiring
Field wiring terminal blocks on the I/O chassis are used to
connect power sources and loads to the module. The terminal
blocks are located directly above and below the slot where the
module is installed. Each terminal block consists of ten #6
wire clamp screw terminals capable of holding two 12 AWG
wires.
Each module has separate power terminals for each output
group (group 1: channels 1-8, group 2: channels 9-16). The
two groups are electrically isolated from each other. Figure 6
shows the proper field wiring for a single module and Figure 7
shows the field wiring for fault tolerant modules connected in
parallel.
This module does not require a return connection from the
field power source. Do not connect any field wiring to
terminals A and D.
Note: