Overview - Procon MelcoBEMS MINI Installation Manual

2. Overview

The Procon MelcoBEMS MINI (A1M) Protocol Converter is used for remote monitoring and control of both Air-to-Air
products (M-, S- and P-series split air conditioning systems) and Air-to-Water products (CAHV, CRHV, PWFY). It acts
as a gateway between the system and external third party equipment.
The MelcoBEMS MINI (A1M) continuously reads data from the system and changes configuration when necessary.
Because the reading is continuous the MelcoBEMS MINI (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 MelcoBEMS MINI (A1M) is powered via the CN105/CN92 connector, hence no external power supply is needed.
Compatible Air-To-Air model numbers can be found in Appendix A of this document.
Caution:
MAC-397IF and MAC-399IF units cannot be connected when the MelcoBEMS MINI (A1M) is connected, as the same
CN105/CN92 connector is used.
Appendix A lists the compatible Air-To-Air indoor units.
Appendix B lists the compatible Air-To-Water indoor units.
Figure 1 shows the MelcoBEMS MINI (A1M) converter.
Figure 2 shows the CN105/CN92 connector on the indoor unit PCB that the MelcoBEMS MINI (A1M) connects to, for
both Air-to-Air and Air-To-Water type units.
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