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Installation
4.3
Connecting the KNX interface
Connect the KNX TP1 bus to Port A on the gateway.
If there is no response on the KNX interface, check that the devices on the bus are connected
and operating correctly, and that traffic to/from the gateway is not restricted.
If using a KNX line coupler, make sure that the coupler is not filtering the telegrams to/from the
Modbus to KNX Gateway.
4.4
Connecting the Modbus interface
Modbus TCP
Connect the network to the Ethernet port on the gateway using a straight UTP/FTP CAT5e or
CAT6 Ethernet cable.
If there is no response from the network, check that the devices on the network are connected
and operating correctly, and that traffic to/from the gateway is not restricted. Contact your
network administrator if in doubt.
Modbus RTU
Connect the EIA-485 bus to Port B on the gateway.
If the gateway is installed at one of the ends of the Modbus serial bus, the internal termination
switch for the port (DIP switch 1) should be switched on. See
Do not use an external termination resistor when internal termination is enabled.
Modbus to KNX Gateway User Manual
Observe the correct polarity of the connections, see
Observe the correct polarity of the connections, see
Connectors, p.
10.
Connectors, p.
10.
DIP Switches, p.
11.
SCM-1202-050 1.2 en-US
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