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34 Pelco Manual C540M (6/98)
Appendix C. Keyboard Connector Pin-Outs
RS-422 Serial Port
Main port used for power into keyboard, and for comm’s link to Pelco
CM9760-CC1 CPU. It is also used to drive Camera Control Receiver/
Drivers in direct mode. These I/O lines are connected to 8 way RJ socket
JP1 as shown below. Incoming DC is also brought in via this connector.
RS-422 Serial Port
A second RS422 port that can be used to support other equipment.
These I/O lines are connected to 8 way RJ socket as shown below.
RS-232 Serial Port
An RS-232 port that can be used for such things as keyboard to key-
board key definition download/upload. These I/O lines are connected
to four-pin RJ socket JP3 as shown below.
PIN 1
DIP SWITCHES
RESET
BUTTON
VOLUME
RELAY 1
2
C COM 3 COM 2 COM 1
JP1 Pin Function JP1 Pin Function
1 RS422 Tx + 5 Gnd (0 VDC in)
2 RS422 Tx - 6 –
3 – 7 RS422 Rx -
4 +12 VDC in 8 RS422 Rx +
JP2 Pin Function JP2 Pin Function
1 RS422 Tx + 5 _
2 RS422 Tx - 6 –
3 – 7 RS422 Rx -
4 _ 8 RS422 Rx +
JP3 Pin Function
4 Gnd
3–
2 RS-232 RX In
1 RS-232 TX Out