Rockwell Automation 1771-IN ac (24V) Input Module Installation Instructions - Manual (Page 4)

Publication 1771-IN082A-EN-P - February 2005
4 AC (24V) Input Module
Calculate Power
Requirements The module receives its power through the 1771 I/O chassis backplane from
the chassis power supply. The module requires 80mA from the output of this
supply .
Add this current to the requirements of all other modules in the I/O chassis to
prevent overloading the chassis backplane and/or backplane power supply.
Key the Backplane
Connector Place your module in any slot in the chassis except the leftmost slot which is
reserved for processors or adapters.
Install the Field Wiring Arm
ATTENTION
Do not insert or remove modules from the I/O chassis
while system power is applied. Failure to observe this rule
could result in:
• module damage or degradation of performance
• injury or equipment damage due to possible
unexpected operation.
Place the keying bands:
– between 4 and 6
– between 10 and 12
Upper
Connector
Position the keying bands in the backplane connectors to
correspond to the key slots on the module.
I/O chassis
You can change the position of these bands if
subsequent system design and rewiring makes
insertion of a different type of module necessary.
Observe the following precautions when in-
serting or removing keys:
• insert or remove keys with your
fingers
• make sure that key placement is
correct
Incorrect keying or the use of a tool can
result in damage to the backplane connector
and possible system faults.
ATTENTION
ATTENTION
Remove power from the 1771 I/O chassis backplane and
field wiring arm before removing or installing the I/O
module. Failure to remove power from the backplane or
wiring arm could cause:
• module damage, degradation of performance, or
injury.
• injury or equipment damage due to possible
unexpected operation.