Rockwell Automation 1747-PCIL Chassis Interface Module for 1746 Local I/O - Manual (Page 5)

Chassis Interface Module for 1746 Local I/O 5
Publication 1747-5.32–April 1998
User Jumper
Your software application program has the ability to read the state of this
jumper. If you are using the API software, refer to publication 1747-6.5.3.
If you are using another software application refer to the documentation
for that software.
Using the Watchdog Jumper with the External Watchdog Connector
This jumper works in junction with the watchdog connector on the front
of the chassis interface module. The watchdog connector output is a solid
state switch that can switch a voltage range of 4.5V dc to 26.4V dc. The
connector plugs onto the front of the chassis interface module.
You need an external power supply to use the external watchdog. Adjust
the external load switched by the watchdog output to 20mA or less. The
watchdog output is normally off and turns on as a result of a watchdog
timeout condition due to an internal hardware failure. When this condition
occurs, a red indicator will light up on the status LED.
You must adhere to the watchdog output polarization to guarantee proper
operation.
dc or TTL input module
user power
supply
Chassis
Interface
Module
Ground the shields
at one end only.
Chassis mounting
bolt preferred.
Use 22-26 AWG
shielded twisted-
pair wire
common -
watchdog
contact +
contact
+ dc
input 0
input 1
input 2
input 3
input 4
input 5
- dc (common)
input 6
input 7
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