Axis T99A12 Guia De Instalacion página 28

AXIS T99A12 Positioning Unit 24 V AC/DC
RS485/RS422 connector
Two 2-pin terminal blocks for RS485/RS422 serial interface used to control auxiliary equipment
such as pan-tilt devices.
The serial port can be configured to support:
• Two-wire RS485 half duplex
• Four-wire RS485 full duplex
• Two-wire RS422 simplex
• Four-wire RS422 full duplex point to point communication
Function
RS485/RS422 RX/TX A 1
RS485/RS422 RX/TX B 2
RS485/RS422 TX A
RS485/RS422 TX B
Cables
Cable thickness
The cable diameter, when using cable gaskets provided with the product, should be in the range of
5 to 11 mm (0.2 to 0.4 in).
NO NO TICE NO TICE TICE
• Use cables that keep within the specified cable area
• Select cables in compliance with your local regulations
• Make sure all cable holes are properly sealed
• Use cable gaskets or cable glands that match both the cable hole and the cable area
For information about accessories, such as cable gaskets and cable glands that allow for other
cable areas, see www.axis.com
Pin Notes
(RX) For full duplex RS485/RS422
(RX/TX) For half duplex RS485
3
(TX) For full duplex RS485/RS422
4
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