Installation/De-installation
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– E65C – CU-P40, P41, P42 – User Manual
© Gyr
Control lines
These RS232 converters are suitable for communication units with or with-
out control lines. For communication units without control lines (e.g. CU-P41)
there is no RTS and DTR signal and the DSR signal is not connected.
Significance of signals in the following converter specifications:
CTS
Clear To Send
RTS
Request To Send
TxD
Transmitted Data
RxD
Received Data
DTR
Data Terminal Ready
DSR
Data Set Ready
DCD
Data Carrier Detect
GND
Signal Ground
The RS232 converter type C consists of a 9-pin DB9 socket and a 6-pin
RJ12 socket, which must be wired as follows:
DB9 socket
RJ12 socket
Pin
Signal
Direction
Pin
Signal
7
1
2
RxD
2
TxD
5
GND
3
GND
6
4
3
TxD
5
RxD
4
6
This RS232 converter is used for the connection between a DTE (PC, ter-
minal, laptop) and a communication unit.
For connection via a cable with two RJ12 plugs (e.g. from a CU-adapter
CU-ADP1 to the meter) the TxD connection must be transposed to RxD.
RS232 converter
type C
RJ12 cable
