ACTi D21FA - Manual (Page 21)

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Hardware Manual
21
How to Connect a Serial Device (for E23B only)
The camera can be connected to a Pan-Tilt (PT) Scanner (Pan-Tilt Head) using the serial port
connector. This allows the zoom camera to do pan and tilt using the Pelco-D protocol. Most PT
scanners accept Pelco-D and Pelco-P protocol commands via RS-485 or RS-422 connection,
which are both supported by your camera.
Check the connection available on the PT scanner and connect it to your camera following the
procedures below.
1. Map the wires from the PT scanner to your camera using the supplied terminal block
according to one of the tables below.
Via RS-485 Connection
Terminal Block Wire Mapping
Label
Camera Pin PT Scanner Pin
RX- -
RX+ -
GND GROUND PIN
TX- (D-) TX- (D-) DATA-
TX+ (D+) TX+ (D+) DATA+
Via RS-422 Connection
Terminal Block Wire Mapping
Label
Camera Pin PT Scanner Pin
RX- RX - TX -
RX+ RX + TX +
GND GROUND PIN
TX- (D-) TX - RX -
TX+ (D+) TX + RX +
NOTE: The pins of the PT Scanner may be labeled differently depending on the location or
country where the scanner is purchased. For example, some PT devices may have RS-485
DATA+ pins labeled as “TX+”, “RX+”, "A” or “485+”, etc. Refer to the scanner documentation
or contact the manufacturer to verify the corresponding pin labels and ensure proper wiring
connection.