How do I identify Reader Interfaces?

Notes on Reader SSTs

For direct connection of readers to the ProTouch terminal, the serial interfaces had a Power Pin added. These interfaces were marked as P versions (P=Power). Instead of the DTR signal, either 5V or 12V can be placed outside via a jumper. In the DP version (DP=DualPower), both voltages are firmly placed outside. The voltage thus provided is protected with a fuse and can be used to supply power to the reader.

In order to make the interfaces recognizable from the outside, the connections are marked as follows on the outside:

* With RS422 interfaces, RS422/485DP is the most up-to-date version replacing all previous ones.

Attention!
Since the P version can have either 5V or 12V placed on the power pin (depending on configuration), there is a danger that external devices such as readers may be destroyed due to careless handling. As an example, the transponder reader must never be connected to an RS232P interface with 12V as it only requires 5V. Therefore, it is absolutely vital to always check the marking at the terminal!

In order to prevent accidental connection, the PIN RX of the transponder reader is coded and the corresponding PIN TXD from the interface at the terminal. That means, however, that this interface can no longer be operated as a full RS232 interface.