ABB SACE Emax E4.2 - Termination Resistor

ABB | SACE Emax 2
Electronic accessories | 7 - Ekip Com Modbus RTU modules209 | © 2017 ABB | 1SDH001330R0002 - ECN000058721 Rev. A
Termination resistor
The modules provide the possibility to insert a 120 Ω termination resistor on the RS-485 bus, by setting the
dip-switches Rterm on the side of the modules, in position on. This option must be selected before the
installation of the modules.
For the positions on and off of the dip-switches Rterm, see the following figure (on Modbus RTU
communication modules, the dip-switches Rpol are not used).
ON
1 2 3 4
Figure 36