Temperature monitoring of the MDC92A.. energy module
The MDC92A.. energy modules are equipped with temperature monitoring. If an overtemperature is detected or if a temperature sensor is defective, an error is output via the digital output X20:1 of the device. This fault can be passed on to a neighboring MDC92A.. device via a daisy chain. The fault signal is evaluated by the controller. Alternatively, the fault signal can be evaluated by an MDP92A.. or MDE90A.. device.
Proceed as follows:
- On the first MDC92A.. energy module, connect the 24-V output of terminal X20:3 to digital input X20:2.
- Connect the digital output X20:1 of the first MDC92A.. device to digital input X20:2 of the second MDC92A.. device. Connect other existing MDC92A.. devices in the same way.
- Connect the digital output X20:1 of the last MDC92A.. device to fault evaluation.
The following states can occur:
Terminal | State | Meaning |
|---|---|---|
X20:2 | DI low | Parallel device fault |
X20:2 | DI high | Parallel device ready for operation |
X20:1 | DO low | Fault in parallel device or in device itself |
X20:1 | DO high | Device ready for operation |
A temperature fault is additionally indicated by a red status LED on the top of the device.
MDC92A.. energy module status LED
The MDC92A.. energy modules have a two-color status LED on the top of the device.
The following table shows the meaning of the operating states:
State of status LED | Meaning |
|---|---|
Is lit green | Ready for operation |
Flashing red | Fan is defective |
Is lit red | Overtemperature or defective temperature sensor |
