Wiring the RS-485 Modbus RTU terminal
Installing the Network Management Module – 11
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2.3 Wiring the RS-485 Modbus RTU terminal
The Modbus Network Module provides an easy path for integrating an EatonUPS into an RS-485 Modbus network and also
provides isolation of the communication between the UPS and the RS-485 Modbus network.
Use the terminal strip on the Modbus Network Module to wire into a two-wire network.
2.3.1 Modbus Common/GND (0V pin on terminal block) connection
The Network Module is an isolated device, if all the other devices on the network are isolated, common/GND (0V pin on terminal
block) should be connected between devices to limit common mode voltage.
Common/GND (0V pin on terminal block) should not be connected to any other devices that is not isolated to avoid ground loops.
2.3.2 Cable shield connection (foiled or braided)
The cable shield should be continuous on the entire length of the bus and should be connected to ground (earth) at only one point
to limit the flow of ground-loop currents in the shield caused by ground potential differences.
2.3.3 Two-wire networks
Interconnect R- with T- and R+ with T+ on the Modbus Network Module terminal strip.
Connect the RS-485 network to the R+ or T+ on the Modbus Network Module terminal strip.
Connect the RS-485 network signal – to the R- or T- on the Modbus Network Module terminal strip.
If the Modbus Network Module is the last device installed in the network chain or the length of the network cable is
excessive, termination needs to be enabled.
For details on termination, see the
Installing the Network Management Module>>>Wiring the RS-485 Modbus
RTU terminal>>>Configuring the termination
Belden 3106A-22AWG or equivalent cabling (a 1.5 twisted-pair shielded 120Ω cable with ground) is recommended.
Summary of Contents for INDGW-M2
Page 1: ...UPS Industrial Gateway Card INDGW M2 User s Guide English 06 25 2021 2 1 5 ...
Page 2: ......
Page 24: ...Configuring Modbus Installing the Network Management Module 24 ...
Page 25: ...Configuring Modbus Installing the Network Management Module 25 ...
Page 26: ...Configuring Modbus Installing the Network Management Module 26 ...
Page 38: ...Home Contextual help of the web interface 38 3 2 7 1 3 Battery mode 3 2 7 1 4 Off mode ...
Page 40: ...Home Contextual help of the web interface 40 3 2 7 2 3 Battery mode 3 2 7 2 4 Off mode ...
Page 42: ...Home Contextual help of the web interface 42 3 2 7 3 2 Bypass mode 3 2 7 3 3 Battery mode ...
Page 63: ...Protection Contextual help of the web interface 63 3 5 4 1 Shutdown on power outage criteria ...
Page 65: ...Protection Contextual help of the web interface 65 Example 2 Immediate OFF ...
Page 66: ...Protection Contextual help of the web interface 66 Example 4 Custom Settings 1 ...
Page 268: ...Acronyms and abbreviations Information 268 ...
Page 276: ......