Allen-Bradley 1747-OC Series, User Manual

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1747-UM001A-US-P - March 2000
7-6 Using the Open Controller
A watchdog wiring kit comes with the open controller CPU module. It
includes four pins and one connector.
Figure 7.7
Connecting the external watchdog contact
The following specifications define watchdog components:
Using the LEDs
STATUS indicator
The STATUS indicator reports the status of the open controller scanner
CPU. Table 7.B lists the LED patterns for STATUS.
Table 7.A
LED patterns for STATUS during normal operation
wires to dc or TTL input module
watchdog contact wiring kit
(comes with the open controller)
contact on the open controller
(side view)
Component: Specification:
housing AMP 87499-4
pins AMP 1-87309-4
recommended hand crimp AMP 90202-2
STATUS BATT
COM 1
LED 1
LED 2
LED 3 LED 4
COM 2
These states are possible: Which mean:
yellow running POST
flashing green idle mode; not scanning I/O
solid green scan mode; scanning I/O
flashing red I/O fault
solid red internal fault / POST failure
off invalid state