TTL Input Module
Cat. No. 1771IGD
Installation Instructions
4
ATTENTION: Remove power from the 1771 I/O chassis
backplane and wiring arm before removing or installing an
I/O module.
Failure to remove power from the backplane or field wiring
arm could cause module damage, degradation of
performance,
or injury.
Failure to remove power from the backplane could cause
injury or equipment damage due to possible unexpected
operation.
1.
Turn off power to the I/O chassis.
2.
Place the module in the plastic tracks on the top and bottom of the
slot that guides the module into position.
3.
Do not force the module into its backplane connector. Apply firm,
even pressure on the module to seat it properly.
4.
Secure the module’s position by doing the following:
with a Series A chassis, snap the chassis latch over the top of the
module
with a Series B chassis, pull down the locking bar
5.
Connect the field wiring arm to the input module.
Connecting Wiring to the Input Module
Connect wiring to the input module using the field wiring arm (cat. no.
1771-WH) shipped with the module (shown in the connection diagram
below). Make your connections as follows:
1.
Attach the field wiring arm to the pivot bar on the bottom of the I/O chassis.
2.
Pivot the wiring arm upward and push it into the module until the wiring
arm clicks into position. The field wiring arm is designed to let you install
and remove the module without disconnecting the wires.
ATTENTION: Do not apply ac or reverse dc voltage to
module terminals. Circuitry at the input of module may
be damaged.
