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AXIS Q7401 - Unit connectors
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 transmi
ssion 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 receiv
ing data using two wires, RX- or TX pair.
• Bidirectional RS-422 full-duplex port for data transmission (point-t
o-point) using four wires, one
RX pair and one TX pair.
SDHC memory card slot - The high capacity SD memory card can be used for local recording with removable storage.
BNC connector - Connect a 75 ohm coaxial video cable (max. lengt
h 800 feet (250 meters).
Note:
If the vid
eo source is to be connected in parallel with other equipment using a BNC T adaptor, disable the input termi-
nation by setting the 75 ohm termination switch to OFF. Failure to do so may cause reduced image quality.
Config-
urable
(Input or
Output)
3 - 6 Digital input - Connect to GND to activate, or leave floating (or uncon-
nected) to deactivate.
Min input = - 40V DC
Max input = + 40V DC
Digital output - Uses an open-drain NFET transistor with the source con-
nected to GND. If used with an external relay, a diode must be connected in
para
llel with the load, for protection against voltage transients.
Max load = 100mA
Max voltage = + 40V DC
Function Pin Notes
RS 485/422TX(A) 1 TX pair for RS-422 and 4-wire RS-485
RS 485/422TX(B) 2
RS-485A alt RS-485/422RX(A) 3 RX pair for all modes (combined R
X/TX for 2-wire RS-485)
RS-485B alt RS-485/422RX(B) 4
Function Pin number Notes Specifications
1
2
E.g. push button
I/O 3 configured as input
I/O 4 configured as output
* Note: Same voltage as pin 2 of the power connector
AXIS Q7401
3.3V
*12V max 100mA
D
S
G
1
234
TX
RX/TX