Rockwell Automation T8451 Trusted TMR 24V dc Digital Output Module - 40 Channel - Manual (Page 27)

Trusted
TM
Module T8451
Issue 12 Apr 10 PD-T8451 27
4.3. I/O Status Indicators
There are 40 output channel status indicators on the module front panel, one for each field output.
These indicators are controlled by the FPU. The FPU receives data from each of the module slices.
The FPU performs a 2-oo-3 vote on each data bit from the slices and sets the indicators accordingly.
The output status indicator mode is dependent upon the numerical state of the output channel. Each
output state can be defined to have a particular indicator mode: off, green, red, flashing green, or
flashing red.
The configurable indicator modes allow users to customise the output status indications to suit
individual application requirements. Without customisation, the default indicator modes are suitable for
line-monitored digital output devices as described below:
INDICATOR STATE DESCRIPTION
Off Output is Off.
Green Output is On.
Green – flashing No Load, output open circuit.
Red Field short circuit, output over current protection triggered and output
channel is latched off.
Red – flashing Channel fault, or no field supply voltage
Table 17 I/O Status LEDs
Note: The LEDs indicating channel status may be configured to suit user requirements by
implementing the procedure for configuring the System.INI file detailed in PD-8082B.