Pelco cs73m-d operation manual Communication Ports Setup, Switch Settings Port Setup Selected

COMMUNICATION PORTS SETUP

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.

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.

COM 2 COM 1

FUSE

COM 1 DIP SWITCH

COM 2 DIP SWITCH

UNIT ID DIP SWITCH

BACK

ON

1 2 3 4 5 6 7 8

Figure 3. DIP Switch

FRONT

Figure 2. Location of DIP Switches

Table A. Port Setup Switch Settings

		SWITCH SETTINGS						PORT SETUP
1	2	3	4	5	6	7	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

Pelco Manual C573M-D (11/03) 7