Wiring devices with Modbus output - HMS110 - HMW112 - TMI110 - HMS112 - HMD110 - HMW110 - HMD112

HMDW110 with TMI110 User Guide

Document code
M211726EN
Revision
E
Language
English
Product
HMS110
HMW112
TMI110
HMS112
HMD110
HMW110
HMD112
Document type
User guide

Use terminals 1 ... 4 for supply power and Modbus output. In addition to RS-485 data wires, the common wire (ground reference) must be connected between the RS-485 host and the transmitter.

Figure 1. HMDW110 series transmitter wiring, Modbus output
Do not connect the analog outputs (terminals 5 ... 8) at the same time when supply power and/or Modbus output is connected to terminals 1 ... 4. Having both terminals connected simultaneously may result in erroneous analog readings caused by effects of possible ground loop.