10
COM462RTU_D00010_04_M_XXDE / 06.2021
Installation, connection and commissioning
3
Installation, connection and commissioning
i
If you are familiar with the configuration of Modbus RTU networks, you can carry out the
connection of the COM462RTU by yourself.
Otherwise please contact your EDP
administrator!
3.1
Preliminary considerations
1. Have all the questions as regards the installation been answered by the technician
responsible for the installation?
2. The device is operated on the internal bus. Is the BMS address to be set known?
If, apart from the COM462RTU, an alarm indicator and test combination MK800 is
connected to the internal bus, the COM462RTU must not have the address 1 (master).
You will find more detailed information on the BMS topic, in particular about the wiring
of bus devices, in the separate document "BMS bus". You can download the document
from the download area of the website www.bender.de.
3. Is the Modbus RTU address to be set known?
3.2
COM462RTU on the internal BMS bus
Bender systems such as EDS46x/49x, RCMS46x/49x and MEDICS communicate with each other via
the Bender measuring device interface BMS.
The BMS-Modbus RTU gateway COM462RTU provides the coupling between the BMS bus and
Modbus RTU networks. The following block diagram illustrates the operation of the gateway in an
internal BMS bus..
Abb. 3–1 Block diagram of a coupling between an
internal
BMS bus and Modbus RTU
COM462RTU
D+ D-
D-
D-
D+
D+
D-
D+
Modbus/RTU
