INDEX
1Presentation ........................................................................................................ 5
2Connection .......................................................................................................... 6
2.1 Connect to the AC indoor unit ........................................................................... 6
2.2 Connection to the EIA-485 bus.......................................................................... 6
2.3 Connection to the power supply ........................................................................ 6
2.4 Connection diagrams ....................................................................................... 7
3Quick Start Guide ................................................................................................. 8
4Modbus Interface Specification ............................................................................... 9
4.1 Modbus physical layer ...................................................................................... 9
4.2 Modbus Registers for INMBSMID001I000............................................................ 9
4.2.1 Control and status registers..................................................................... 9
4.2.2 Configuration Registers .......................................................................... 11
4.3 Modbus Registers for INMBSMID004I000 / INMBSMID008I000 /INMBSMID032I00012
4.3.1 Global Control and status registers .......................................................... 12
4.3.2 Individual Control and status registers ..................................................... 13
4.3.3 Configuration Registers .......................................................................... 14
4.4 Considerations on Temperature Registers ......................................................... 15
4.5 DIP-switch Configuration Interface .................................................................. 17
4.6 Implemented Functions .................................................................................. 20
4.7 Device LED indicator ...................................................................................... 20
4.8 EIA-485 bus. Termination resistors and Fail-Safe Biasing mechanism................... 21
5Electrical and Mechanical features .........................................................................22
6List of supported AC Unit Types.............................................................................23
7Error Codes ........................................................................................................24
