E-T-A ControlPlex EM12D-TIO, User Manual

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7 Communication types
7.1 SIO mode, group signal at PLC input
Commencing with revision F, the SIO mode is available in the supply module.
It is possible to connect the EM12D-TIO directly to a PLC input. In this case, it is not the IO link information that is going to be
transmitted, but only the group status signal.
The data line IO link C/Q to X81 carries a high signal if no circuit circuit protector has tripped. As soon as a circuit protector trips,
the data line IO link C/Q to X81 carries a low signal.
Trip is acknowledged via the momentary switch on the circuit protector in question.
7.2 Model of the EM12D-TIO intelligent supply module
The EM12D-TIO has an internal ELBus® interface enabling the communication with the electronic REX12D circuit protector. There
are two different models of the supply module. The choice of the model in question is determined by the IODD used.
7.2.1 Models for the operation of 32 channels
Up to 16 devices with max. 32 channels can be connected to the supply module. Only the status is transmitted cyclically with this
model. It accommodates both REX12D-Tx1 (1-channel) circuit protectors or REX12D-Tx2 (2-channel) or even a combination of both.
7.2.2 Models for the operation of 16 channels
Up to 16 channels can be connected to the supply module. This extended version not only provides cyclical transmission of the
status, but also the present current of the load circuits. Due to the limited transmission width with IO link of 32 bytes, the number
of channels is limited to 16 due to the higher number of data to be transmitted. The model accommodates both REX12D-T1
(1-channel) circuit protectors or REX12D-Tx2 (2-channel) or a combination of both.
7.2.3 Population errors
If a double channel device is connected as channel 16/17 or 32/33, the control unit will receive the information that a device is
available at channel 16 or 32.
When reading out the Cominfo of the circuit protector, a message will be received saying that the circuit protector has wrong
parameters.
The channels cannot be operated (cannot be switched on).
7.2.4 Error device addressing
Due to mechanical problems, there may be addressing errors. This will become evident as follows: some channels are OFF after
applying voltage. They cannot even be switched on by means of the button (LED orange or green). Possible causes are deformed
or missing contacts in the connector arm.