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Pelco Manual C535M-B (8/98)
3.3  CONNECTING TO THE RECEIVERS
The rear panel view and pin out for the 6 pin modular cable is shown in Figure 3.
Refer to Figures 4 and 5 for additional system configurations.
Figure 2.  RS-485 Duplex Control System (PTZ Control and Alarm Reporting)
Figure 3.  MPT9500 Rear View and RS-485 Serial Port Pin Out
CX9504
CX9504
PROGRAMMING MONITOR
1 TXD (–)
2 TXD (+)
3 GND
4 GND
5 RXD (–)
6 RXD (+)
RXD (–)
RXD (+)
TXD (–)
TXD (+)
RXD (–)
RXD (+)
TXD (–)
TXD (+)
KEEP PARALLEL CONNECTIONS
INTO RECEIVERS VERY SHORT
NO “T” CONNECTIONS
UP TO 32 RECEIVER/PTZ
DRIVERS PER TRUNK LINE
LIMITED BY BAUD RATE
AND ACCEPTABLE LOOP
RESPONSE TIME.
(RECOMMENDED 8 PTZ 
DRIVERS, 2400 BAUD) 
THE LAST RECEIVER/DRIVER
MUST BE TERMINATED WITH
120 OHMS.
RXD (–)
RXD (+)
TXD (–)
TXD (+)
RS-485
SERIAL
PORT
LOOPING OUTPUT
VIDEO INPUT MONITOR OUTPUT
RESET
FUSE
MODULAR
POWER
CONNECTOR
RS-485
SERIAL
PORT
LOOPING
OUTPUT
VIDEO
INPUT
MONITOR
OUTPUT
RESET
PIN 1
RS-485
SERIAL
PORT
PIN 1  TXD –
PIN 2  TXD +
PIN 3  GND
PIN 4  GND
PIN 5  RXD –
PIN 6  RXD +
RS-485 SERIAL
PORT PIN OUTS
REAR VIEW