Filter
Top Products
Pelco Manual C573M-D (11/03) 7
COMMUNICATION PORTS SETUP
There are two sets of DIP switches inside the MDA for selecting the type of interface for the
communication ports (COM 1 and COM 2).
The unit comes from the factory configured for RS-422. If your communication scheme is
RS-422 and you intend to program the MDA(s) through a CM9760-KBD, KBD200A or
KBD300A keyboard, leave the settings alone.
However, if the communication scheme is different than RS-422, or you are going to
program the MDA through a PC (which requires RS-232), do the following to change
settings. (Generally, programming through a PC is easier than programming through a
System 9760 keyboard. For more information, refer to the
Programming
section.)
1. Remove the 10 screws on the top cover and lift it off.
2. Refer to Figure 2 for the location of the switches for COM 1 and COM 2. Refer to
Table A for the switch settings.
3. Replace the cover.
NOTE:
COM 1 is config-
ured at the factory for
RS-422 communication. To
communicate via RS-232,
you must open the case and
change an internal DIP
switch.
Figure 2. Location of DIP Switches
Figure 3. DIP Switch
Table A. Port Setup Switch Settings
21345678
ON
SWITCH SETTINGS PORT SETUP
1234567 8 SELECTED
OFF OFF OFF OFF ON ON OFF OFF RS-232 Operation
ON ON ON ON OFF OFF OFF OFF RS-422 Operation*
ON ON ON ON OFF OFF ON OFF RS-485 Operation
* Factory default setting
FRONT
BACK
UNIT ID DIP SWITCHCOM 2 COM 1
FUSE
COM 1 DIP SWITCH
COM 2 DIP SWITCH