MR ETOS ED - Page 77

6 Mounting
Maschinenfabrik Reinhausen GmbH 2020 776385142/08 EN ETOS
®
ED
6.4.3.3 MESSKO® MTRAB® 2.5
If you would like to use a MESSKO® MTRAB® 2.5 sensor, you must con-
nect the sensor to the RS485 plug terminals on the sensor bus.
CPU-COM2
MTRAB 2.5
D0 (A)
D1 (B)
Com. (C)
1
2
3
4
5
6
7
8
9
D+ | Rx+
D- | Rx-
Comm
Tx-
Tx+
Shield
Figure60: Connection example MESSKO® MTRAB® 2.5 (terminal RS485)
You must enable the half-duplex operating mode on the sensor by switching
the "Duplex mode" switch to the "HALF" setting. If the MESSKO® MTRAB®
2.5 sensor is the only bus device or the last bus device, you must activate
the sensor terminating resistor by switching the "BUS termination 120 ohms"
switch to the position "1 = ON" and "2 = OFF".
Figure61: MESSKO® MTRAB® 2.5 Modbus configuration
1 Terminating resistor: in half duplex
mode: 1 = ON, 2 = OFF; in full du-
plex mode: 1 = ON, 2 = ON
2 Operating mode: HALF = half du-
plex, FULL = full duplex
3 Modbus address