7.0 Annexure A: Modbus network wiring guidelines
Typical Modbus network consists of:
• Central heating station
• Surge protector
• RS485 (Modbus) repeater
• Modbus to Ethernet converter
• Repeater stations (individual houses with repeater)
• Surge protector
• RS485 repeater
• Individual houses (without repeater)
• Surge protector
Each nodes in the Modbus network (central heating station,
repeater station or individual house) can have “surge protector”.
Top level logical drawing:
# 1 = central heating station
# 2 = individual house W/O repeater
# 3 = repeater station
1) = surge protector
2) = repeater
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