Axis Q7401 User Manual page 47

Function Pin number
GND 1
12VDC Power 2
Configurable 3 - 6
(Input or Out-
put)
The following connection diagram gives an example of how to connect an auxiliary device to the AXIS Q7401.
RS-422/RS-485 connector - Two 2-pin terminal blocks for RS-485/422 serial interface used to control auxiliary equipment,
e.g. PTZ devices.
The RS-485/422 serial port can be configured in the following port modes:
• Bidirectional RS-485 half-duplex port for data transmission using two wires, one combined
RX/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 or 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.
Function
RS 485/422TX(A)
RS 485/422TX(B)
RS-485A alt RS-485/422RX(A)
RS-485B alt RS-485/422RX(B)
Notes
Ground
Can be used to power auxiliary equipment.
Notes:
This pin can only be used as power out.
Same voltage as pin 2 of the power connector.
Digital input - Connect to GND to activate, or leave floating (or uncon-
nected) to deactivate.
Digital output - Uses an open-drain NFET transistor with the source
connected to GND. If used with an external relay, a diode must be con-
nected in parallel with the load, for protection against voltage tran-
sients.
AXIS Q7401
*12V max 100mA
3.3V
I/O 3 configured as input
I/O 4 configured as output
D
G
S
* Note: Same voltage as pin 2 of the power connector
Pin Notes
1 TX pair for RS-422 and 4-wire RS-485
2
3 RX pair for all modes (combined RX/TX for 2-wire RS-485)
4
AXIS Q7401 - Unit connectors
1
E.g. push button
2
47
Specifications
Max load = 100mA
Min input = - 40V DC
Max input = + 40V DC
Max load = 100mA
Max voltage = + 40V DC
TX RX/TX
1 2 3 4