Blue Box SIGMA 2002 - RS485 Serial Interface (Optional)

Blue Box - 48
4.17.1 Microprocessor controller for /LE and HP/LE versions
- Versions SIGMA 2002 /LE and SIGMA 2002 HP/LE with two compressors are equipped with an mCHILLER
controller.
- Versions SIGMA 2002 /LE and SIGMA 2002 HP/LE with four compressors do not have an integral controller and
therefore an external controller, or thermostats, must be connected to the auxiliary terminals 1-21, 1-31, 1-41
and 1-51.
Consult the electrical diagram attached to the unit.
4.17.2 RS485 serial interface (optional)
All units can be equipped with a serial interface board for supervision or remote diagnostic
functions via a computer.
The serial interface board plugs into a dedicated slot on the connection board.
Connection to the supervision or remote diagnostics serial line is executed in compliance with standard RS485
and is achieved by means of the serial interface boards.
Models from 3.2 to 13.2 with two scroll compressors and mCHILLER controller
When the serial interface board is inserted the Carel communications protocol is available.
A conversion gateway is required for Modbus-jbus and BacNet protocols.
Models from 14.4 to 26.4 with four scroll compressors and pCO
2
controller
When the serial interface board is inserted the following communications protocols are available: Carel, Modbus-
jbus, BacNet. If a connection is to be made with networks that utilise the Lon-Talk protocol, a dedicated board
must be installed.
In this case, a conversion gateway is not required.