Modbus, Communication – AERCO Modbus Communications Manual User Manual
Page 64
GF-114
MODBUS
Communication
Chapter 4
OMM-0035_0C
USER MANUAL
Hardware Setup & Installation
Page
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Figure 4-6: EMS Master To BMS II/ACS Slave Connection Diagrams (Sheet 2 of 2)
4.2.3 BMS/BMS II/ACS Master To C-More Boiler Controller Slaves
Wiring connections for Modbus operation between a BMS/BMS II/ACS Master and C-More Boiler
Controller Slaves are made between the BMS/BMS II/ACS internal RS485 Port terminals and the
I/O Box for the associated C-More Boiler Controller. The RS485 Port terminals for the BMS and
BMS II/ACS are shown in Figure 4-4 and 4-5 respectively. The RS485 COMM connections at
each Boiler’s I/O Box are shown in Figure 4-7. Identical I/O Boxes are used for both Benchmark
and KC1000 Boilers.