ABB Arc Guard System TVOC-2-COM, Configuration Manual

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12 ABB ARC GUARD SYSTEM™ – TVOC-2-COM MODBUS CONFIGUR ATION MANUAL
2.1 General
Modbus/RTU is a 2-wire, RS485-based field bus
communication system for parameter value exchange.
INFORMATION
The implementation of the Modbus interface is
based on standards [1] and [2].
2.2 Modbus connector
The supplied Modbus connector has the following pin
configuration:
Table 1 Modbus Connector
Terminal
EIA/TIA-485 name ITr/IDv Description
+(B) B/B’ D1 Transceiver terminal 1
Terminator 1 input*
-(A) A/A’ D0 Transceiver terminal 0
Terminator 2 input*
DGND C/C’ Common Signal common
* If the device is connected as first or last device in a multi-drop system, a 120Ω terminator resistor should be installed between terminator inputs (A) and (B).
2.3 Modbus cables
Recommended cable: Belden 3105A (AWG22).
Figure 2
Modbus connector
+(B) -(A) DGND
02
Draft, ne pas diffuser Wed Dec 05 2018 12:41:51 GMT+0100 (Romance Standard Time)