User Manual Owner's manual

1 Publication 1797-6.5.2 - February 2001

Chapter

Troubleshooting the FLEX Ex Thermocouple/

RTD/mV Input Module

What this Chapter Contains

Read this chapter to troubleshoot your I/O module.

Status Indicators

The 1797-IRT8 module has one status indicator for each input (8 in

all) and one power indicator that is on when power is applied to the

module .

For information on: See page:

Status Indicators 7-1

Repair 7-2

Chapter Summary 7-2

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-IRT8

PWR

A B C

A = Status indicators

B = Insertable labels for writing individual input designations

C = Power indicator

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