Connecting Ciper Model 50 Via Its Rs485-2 Interface To A Modbus - Honeywell CIPer 50 Installation & Commissioning Instructions

CIPer MODEL 50 CONTROLLER – INSTALLATION & COMMISSIONING INSTRUCTIONS

Connecting CIPer Model 50 via its RS485-2 Interface to a Modbus

With regards to Fig. 50, please note the following:
NOTE: Always power each CIPer Model 50 controller and the connected Modbus slaves via separate transformers.
NOTE: For "L," see section "RS485 Standard" on pg. 10.
NOTE: If any of the devices are electrically isolated, it is recommended that those devices be connected to signal ground.
See section "RS485 Standard" on pg. 10.
NOTE: Between devices equipped with non-isolated RS485 bus interfaces, potential differences of max. ±7 V are allowed.
Further, this bus should not extend beyond a single building.
Example: CIPer Model 50 Modbus Master Controller and Connected Modbus Slaves
(with inserted termination resistor)
Fig. 50. Connection of an CIPer Model 50 Modbus master controller via its RS485-2 interface to a Modbus with slaves
The termination resistor must be inserted directly into the terminals of the last Modbus slave.
NOTE: In this example, a maximum of one of the Modbus RTU slaves can be an CIPer Model 50 Modbus RTU slave –
which must then be positioned at the end of the Modbus (as "Modbus Module #N"); the insertion of the
aforementioned termination resistor is then unnecessary.
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