User manual

Publication 1797-6.5.1 - April 1999
7-2 Troubleshooting the FLEX Ex Analog I/O Modules
1797-OE8 Module
The 1797-OE8 module has one power that is on when power is applied to
the module and one status indicator for each input.
Repair
This module is not field repairable. Any attempt to open this module will
void the warranty and IS certification. If repair is necessary, return this
module to the factory.
Chapter Summary
In this chapter you learned how to troubleshoot the FLEX Ex analog I/O
modules. Move to Appendix A to see the specifications for your module.
Indicator Color State Meaning
Status Red On At power up – Channel 0 indicator lights at powerup until
all internal diagnostics are checked. After successful
powerup, the indicator goes off if no fault is present.
After successful powerup – Indicates a critical fault
(diagnostic failure, etc.)
Blinking (when
faults are
enabled, and bit
set)
Indicates a noncritical channel fault
Power Off Module not powered
Green On Module receiving power
1797- OE8
Allen-Bradley
B
-
A
OUT 1OUT 0 OUT 2 PWROUT 7OUT 6OUT 5OUT 4OUT 3
4
8 CHANNEL ANALOG OUTPUT
41442
A B C
A = Status indicators
B = Insertable labels for writing individual input designations
C = Power indicator