Establishing Rs-485 Connections - ABB CoreSense M10 Installation Manual

Establishing RS-485 connections

The RS-485 can be used in full- or half-duplex mode (see Figure 41). All signals on RS-485 (J18) are
isolated.
The RS-485 interface is intended to be used in point-to-point mode. There is no need to add a 120 Ω
termination on the receiver (Rx); the resistor is present on board. The transmitter (Tx) must be
terminated at the other end.
Other RS-485 topologies are not supported.
NOTICE
Use only shielded cable for wiring the RS-485 interface.
—
Figure 41 RS-485 wiring details (full duplex - left, half duplex - right)
Case
Tx+
NOTICE
For more information on the various communication cables used, see Table 4 on
page 24 and "Connector definitions" on page 89.
For more information on configuring the communication protocols, refer to the
CoreSense M10 Monitoring System User Guide.
Tx– GND Rx– Rx+
Case
Tx– GND Tx+
Rx– Rx+
Connecting the CoreSense M10
57