MDB (Multi-Drop Bus) to RS232 Interface

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N.B. This product is not supplied with a power supply.

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Quick find code: MDBRS232
Sorry, this item is no longer available
Model: MDB-RS232
Condition: New
Product Code: MDBRS232
Dimensions (mm): H50 W100 D30

Description

This MDB (Multi-Drop Bus) to RS232 Interface Unit (IU) is designed to convert the MDB Coin Changer (CC) and MDB Bill Acceptor (BA) protocol to RS-232 serial protocol. The IU functions as a slave to a master control system. The master may be any control system that supports RS-232 serial communication, for example a PC.

Details

The MDB master and slave communication is based on master requests and slave replies. The master sends a status request (or command) to the IU and the IU answers by sending its current status. The IU's typical response to the Master's request (polling) consists of a header and data bytes. If there is no BA or CC activity, the status is one byte, the header only. When the IU receives data from the BA or CC, it sends a header followed by data bytes in the response to master's status request. The master must always poll (query) the IU. If the IU does not receive a query from the master in the predefined time slot or IU does not recognize master messages 10 times in row, it will inhibit the BA and CC acceptance. At power up, acceptance of the BA and CC is inhibited.

Power supply information: