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32
AXIS P8221 - Unit connectors
Unit connectors
RS-232/485/422 connector - 5-pin terminal block for the RS-232/485/422 serial interface used to
control auxiliary equipment. The port can be used in the following modes:
• 2TX/2RX RS-232 interface (RD, TD, RTS, CTS)
• Bidirectional RS-485 half-duplex port for data transmission using two wires, one combined
RS/TX pair
• Bidirectional RS-485 full-duplex port for data transmission using four wires, one RX pair and
one TX pair
• Unidirectional RS-422 port for transmitting and receiving data using two wires, RX- or TX pair
• Bidirectional RS-422 full-duplex port for data transmission (point-to-point) using four wires, one RX pair and one TX
pair
Note:
When using a long cable and high communication speeds it is recommended to insert a 120 ohm termination resistor
between the RS-485 wires at both ends of the cable.
Audio 1:
Audio in (pink) – 3.5 mm input for a mono microphone, or a line-in mono signal (left channel is used from a stereo signal).
Audio out (green) – 3.5 mm output for audio (line level) that can be connected to a public address (PA) system or an active
speaker with a built-in amplifier. A pair of headphones can also be attached. A stereo connector must be used for the audio
out.
Audio 2:
Audio terminal block connector - 5-pin terminal block for connecting external audio
equipment.
Gain - Controls the microphone in level (Audio 2). Use a screwdriver (2.5 mm flathead) to adjust the level.
Network connector - RJ-45 Ethernet connector. Supports Power over Ethernet (PoE class 3). Using shielded cables is
recommended.
Function Pin Notes
RS-232 TD alt
RS-485/422TX(B)
1 RS-232 Driver Output
TX pair for RS-422 and 4-wire RS-485 (combined RX/TX pair for 2-wire
RS-485)
RS-232 RTS alt
RS-485/422TX(A)
2
GND 3 Ground
RS-232 CTS alt
RS-485/422RX(B)
4 RS-232 Receiver Input
RX pair for all RS-485/422 modes
RS-232 RD alt
RS-485/422RX(A)
5
Function Pin Notes
MIC+ 1 Microphone in
Provides 48 V DC phantom power
MIC- 2
GND 3 Ground
SPKR+ 4 Speaker out with built-in amplifier
1 W RMS at 10% THD, min. 4 ohm
SPKR- 5
1 2 3 4 5
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