Pelco C1520M-B User Manual
12
Pelco Manual C573M-D (11/03)
1
2
3
4
8
7
6
5
14
15
16
PGM
MON
120V A
COM1
COM2
UNI T
WALL BLOCK
GROUND
COMPUTER
RECEIVE
RECEIVE
COMPUTER
TRANSMIT
TRANSMIT
PC SIDE
COM1 RJ-45
CONNECTOR
CONNECTOR
PIN 1
PIN 8
RJ-45
CONNECTOR
CONNECTOR
REVERSED CABLE CONNECTIONS
WALL BLOCK
RJ-45
CONNECTOR
CM9760-MDA
RJ-45
CONNECTOR
PIN 1=TX
PIN 8=RX
REVERSED CABLE
CM9760-MDA
MDA SIDE
1
2
3
4
5
6
7
8
9
PIN 1=TX
PIN 8=RX
CONNECTING THE MDA TO AN EXTERNAL PC
Perform this step if you are going to program your CM9760-MDA unit using a PC (personal
computer).
computer).
Refer to Figure 5 and make a cable to connect the MDA to the PC. The figure shows a
typical nine-pin sub “D” connector for the PC’s COM 1/COM 2 serial port. Computers may
differ regarding connector types and pin-outs. Therefore, always refer to the computer’s
manual to determine proper pin-outs.
typical nine-pin sub “D” connector for the PC’s COM 1/COM 2 serial port. Computers may
differ regarding connector types and pin-outs. Therefore, always refer to the computer’s
manual to determine proper pin-outs.
If more than one MDA is to be programmed using a PC, note the following:
•
A maximum of 16 MDA units can be daisy-chained. To daisy-chain up to 16 MDA units,
connect the RS-422 output of the first MDA unit to the RS-422 input of the second
MDA unit and continue this method until the last MDA unit is connected (refer to Table
D and to Figure 39).
connect the RS-422 output of the first MDA unit to the RS-422 input of the second
MDA unit and continue this method until the last MDA unit is connected (refer to Table
D and to Figure 39).
•
If more than 16 MDAs are to be connected to a PC, a CM9760-CDU-T must be used.
Refer to Figure 40 for an example of connecting over 16 MDAs to a PC. Note that a
maximum of 64 MDA units can be connected to a PC for programming.
Refer to Figure 40 for an example of connecting over 16 MDAs to a PC. Note that a
maximum of 64 MDA units can be connected to a PC for programming.
NOTE:
The CM9760-MDA
is configured at the factory
for RS-422 communication.
To communicate via RS-232,
an internal DIP switch must
be changed. Refer to the
for RS-422 communication.
To communicate via RS-232,
an internal DIP switch must
be changed. Refer to the
Communication Ports Setup
section.
Figure 5. PC Connection to CM9760-MDA
Table D. MDA RJ-45 Connector Pin-Outs
Pin Out
RS-232 Function
RS-422 Function
RS-485 Function
1
Transmit
Transmit +
Transmit +
2
No Connection
Transmit -
Transmit -
3
No Connection
No Connection
No Connection
4
Ground
Ground
Ground
5
Ground
Ground
Ground
6
No Connection
No Connection
No Connection
7
No Connection
Receive -
Receive -
8
Receive
Receive +
Receive +
NOTE:
The pin numbering
of the wall block shown in
Figure 5 applies to the Pelco
RJ-45 wall block. A wall
block purchased from a
supplier other than Pelco
may have a different pin
numbering scheme.
Figure 5 applies to the Pelco
RJ-45 wall block. A wall
block purchased from a
supplier other than Pelco
may have a different pin
numbering scheme.