ACTi B21 - Manual (Page 19)

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Hardware Manual
19
Connecting a Serial Device (Optional)
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. The terminal block the comes with the camera may
either be labelled as one of the following:
Serial Port Terminal Block
Via RS-485 Connection
Terminal Block Wire Mapping
Pin Number / Label Camera Pin PT Scanner Pin
1 TX + (D+) TX + (D+) DATA +
2 TX – (D-) TX – (D-) DATA -
3 GND GROUND PIN
4 RX+ -
5 Rx- -
Via RS-422 Connection
Terminal Block Wire Mapping
Pin Number / Label Camera Pin PT Scanner Pin
1 TX + TX + RX +
2 TX - TX - RX -
3 GND GROUND PIN
4 RX+ RX + TX +
5 Rx- RX - TX -
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 devices may have RS-485
or