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2. Overview
The Procon A1M Protocol Converter is used for remote monitoring and control of M-, S- and P-series split air
conditioning systems. It acts as a gateway between the split system and external third party equipment.
The A1M continuously reads data from the indoor unit and changes configuration when necessary. Because the
reading is continuous the A1M always stores up-to-date data. This data is then available to external devices through
the RS-485 port using the Modbus RTU software protocol. Values can be read and changed via this connection.
Please refer to the Modbus section for further information.
The A1M is powered from the indoor unit when connected via the CN105/CN92 connector, hence no external power
supply is needed.
Caution:
MAC-397IF and MAC-399IF units cannot be connected when the Procon A1M is connected, as the same CN105/CN92
connector is used.
Figure 1 shows the A1M converter.
Figure 2 shows the CN105/CN92 connector on the indoor unit PCB that the A1M connects to.
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