Fluke NORMA 4000 Operators, User Manual, Page: 43 / 184

Hardware Interfaces
RS-232-C Interface
3
3-7
CTS
TxD
RxD
GND
1
6
5
9
RTS
2 - TxD (transmit data to DTE/controller)
3 - RxD (receive data from DTE/controller)
4 - DSR
5 - GND
6 - DTR
7 - CTS (input from DTE/controller)
8 - RTS (output to DTE/controller)
9 - RI
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Figure 3-2. Pin Assignment of RS-232-C Interface
Signal Lines
RxD (Receive Data):
Data line; transmission from external controller to instrument.
TxD (Transmit Data):
Data line; transmission from instrument to external controller.
DTR (Data terminal ready):
Not used.
GND (Ground):
Interface ground, connected to instrument ground.
DSR (Data Set Ready):
Not used.
RTS (Request To Send):
The device sets RTS line low (logic 0) when it cannot accept more data from the
DTE/controller.
CTS (Clear To Send):
The device stops transmitting data to the DTE/controller when it detects CTS line
goes low.