Instruction Manual

HMP230 SERIES
Appendix 8: Connectors M210225en-B
142
1.3 Serial connections
Also an RS232C serial bus can be connected to the connector; in this case, the
connector is used mainly for maintenance and calibration purposes.
Alternatively, a two wire RS 485 net can be built through the connector; in
this case, also the power supply (24 VDC) is chained through transmitters.
RS232C connection
Part # Connection
19371
1X6/Rx
2X6/Tx
3 X6/GND-
4X1/NC
5X1/NC
The male connector (part n. 19371) is located on the right hand side of the
transmitter. It is mounted with a sleeve socket Pg11/Pg9 (part no. 19813). The
counter piece incorporating screw terminals (part no. 19370) is delivered with
each connector.
RS485 single loop wiring
Part # Connection Part # Connection
19372 19371
1 X1/24V+ 1 X1/24V+
2 X6/RxHi 2 X6/RxHi
3 X1/24V- 3 X1/24V-
4X6RxLo 4 X6RxLo
5 X1/NC 5 X1/NC
The female connector (part no. 19372) is located at the centre of the
transmitter. The male connector (part no. 19371) is located at the right hand
side of the transmitter. It is mounted with with a sleeve socket Pg11/Pg9 (part
no. 19813). Counter pieces (parts no. 19369 and 19370) are delivered with
each connector. If the transmitter is removed for maintenance, the counter
pieces can be connected to each other in order not to break the RS485 loop.