Discrete Inputs/Outputs fault display

At a Glance

The I/O modules are equipped with a display block featuring LEDs that allow the module’s operating modes and any failures to be displayed.

Illustration

The following diagram shows the position of the three fault display LEDs, on the front panel of the Discrete I/O modules.

Description

The following table explains how the LEDs located on the Discrete I/O display block operate.

LEDs	Continually lit	Flashing	Off
RUN (green)	Module operating normally.	-	Module faulty or off.
ERR (red)	Internal error: Module failure.	Communication error if RUN LED is on. Module non-configured if RUN LED is off.	No internal error.
I/O (red)	External fault: overload, short circuit, sensor/pre-actuator voltage error.	Terminal block error.	No external error.
Channel status	Channel at 1	Channel error, overload or short circuit.	Channel at 0

NOTE: When the sensor power outage, the error LED of the following modules switch on and the last recorded position of the sensor is displayed by the inputs LED.

The following list gives the 24 VDC modules:

TSX DEY 16D2
TSX DEY 32D2K
TSX DEY 64D2K

The following list gives the 48 VDC modules:

TSX DEY 16D3
TSX DEY32D3K

WARNING

CHANNEL LED INFORMATION NOT MATCHING SENSORS POSITION

After a sensor power outage:

The I/O error LED is on.
Do not take into account the input LEDs information (they show the last recorded position of the sensors, not their real positions).
Check the real positions on the sensors.

Failure to follow these instructions can result in death, serious injury, or equipment damage.

Fault display blocks

There are several fault display blocks depending on the type of Discrete I/O module:

Module	Illustration	Description
8-channel modules	Fault display block	These modules have: 3 RUN - ERR - I/O module status LEDs, 8 channel status LEDs.
16-channel modules	Fault display block	These modules have: 3 RUN - ERR - I/O module status LEDs, 16 channel status LEDs.
28 and 32-channel modules	Fault display block	These modules have: 3 RUN - ERR - I/O module status LEDs, 32 channel status LEDs.
64-channel modules	Fault display block	These modules have: 3 RUN - ERR - I/O module status LEDs, 1 x +32 LED to display channels 32 to 36, 32 channel status LEDs, 1 switch to display channels 32 to 63.

NOTE: On a loss of power to the sensors, for TSXDEY16D2/3, TSXDEY32D2K and TSXDEY64D2K 24VDC and 48VDC input modules, when the red I/O error light is on, the status of the input lights (green) is meaningless and can be different from the current status of the module inputs.In general, the lights' status corresponds to the last valid status seen by the module before loss of power to the sensors.