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7
AXIS Q1910/-E/AXIS Q1921/-E - Product overview
RS-485/422 connector - Two 2-pin terminal blocks for RS-485/422 serial interface used to control auxiliary equipment, e.g.
PT 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 usi
ng 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-t
o-point) using four wires, one RX pair and one TX
pair
I/O terminal connector
Used in applications for e.g. motion detection, event triggering and alarm notifications. In addition to an
auxiliary power and a GND pin, the network camera has 2 pins
that can be configured as either input or
output. These pins provide the interface to:
• Transistor output - For connecting external devices suc
h as relays and LEDs. Connected devices can
be activated by VAPIX® application programming interface (API), by output buttons on the Live View page or by an
Event Type. The output will show as active (shown under Events > Port Status) if the alarm device is activated.
• Digital input - An alarm input for connecting devices that
can toggle between an open and closed circuit, for exam-
ple: PIRs, door/window contacts, glass break detectors, etc. When a signal is received the state changes and the input
becomes active (shown under Events > Port Status.)
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 RX/TX for 2-wire RS-485)
RS-485B alt RS-485/422RX(B) 4
Function Pin Notes Specifications
GND 1 Ground
3.3 V DC Power 2 Can be used to power auxiliary equipment.
Note: This pin can only be used as power out.
Max load = 250 mA
Configurable (Input
or Output)
3 - 4 Digital input - Connect to GND to activate, or leave
floa
ting (or unconnected) to deactivate.
Min input = - 40 V DC
Max input = + 40 V DC
Recommended range:
0 V DC to + 20 V DC
Digital output - Uses an open
-drain NFET transistor
with the source connected to GND. If used with an
external relay, a diode must be connected in parallel
with the load, for protection against voltage tran-
sients.
Max load = 100 mA
Max voltage = + 40 V DC
Recommended voltage:
Up to +20 V DC
4
321
RS-485/422
RX/TX TX
4321
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