Smv Modbus Transmitter Connection To A Pc Based Modbus (Rs-485) Host; Figure 18 - Transmitter Configuration Via Modbus (Rs-485) Network Port - Honeywell SMV800 SmartLine User Manual

network), can cause communication failure. For improved performance, DC termination is
recommended.
Ensure power lines & Modbus communication lines are not swapped during installation/
maintenance.
NOTE: After wiring the Transmitter as outline in the next sections, torque the screws to 1.1 Nm
(10 lb-in)
5.4 SMV Modbus Transmitter Connection to a PC based Modbus
(RS-485) Host
For configuration of the transmitter using Laptop/PC based application following
wiring recommendation are to be followed: Refer
•
Supply voltage (9.5V to 30V DC) is to be fed between Terminal #1 & Terminal #2.
•
Sensor inputs can be connected on Terminals #5 to Terminals #8 as per the Sensor type
•
Isolated USB to RS-485 adaptor is recommended for connecting between PC based Host and
Transmitter
•
Default configuration of Modbus communication parameters unless otherwise changed is:
Baud rate – 9600 bps, Parity – None and Device address - 247.
Before connecting to the PC-based host the device needs to be disconnected from the
external host (if any).
Isolated RS-485 USB adaptor is recommended when connecting the transmitter to PC.
Figure 18 – Transmitter configuration via Modbus (RS-485) network port
Refer Table 10– Wiring details for SMV Modbus Terminal block
Revision 10
Figure
SMV800 Transmitter User's Manual
18.
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