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A.2 GPIO Terminal Application
Typically used in association with programming scripts for developing applications for motion detection,
event triggering, alarm notification via e-mail, and a variety of external control functions. The 6-pin I/O
Terminal Block is located on the rear panel and provides the interface to: a photo-coupled switch output,
a photo-coupled input, and RS-485 interface. The RS-485 is typically used for pan/tilt control.
Connector Pin Assignment
PIN
FUNCTION
IN+
Photo-Relay INPUT (+)
IN-
Photo-Relay INPUT (-)
OUT+
Photo-Relay OUTPUT (Normal Open)
OUT-
Photo-Relay OUTPUT (Common)
TX+
RS-485 (+) or (A)
TX-
RS-485 (-) or (B)
Interface Schematic
SPECIFICATION
Active High voltage 9~40VDC
Dropout voltage 0 VDC.
Close circuit current maximum 70mA AC or 100mA
DC.
Output resistance 30 Ohm.
Open circuit voltage maximum 240V AC or 350V
DC.
Compliant to RS-485.
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