33
A
W
IRING
T
HE
B
INARY
I
NPUT AND
O
UTPUT
Binary Input
Binary I/O Voltages less than 24 volts
The Binary input on the Rack Video Cards allows you to connect
external trigger sources to the device.
Notice
For information on configuring alarms from binary inputs, please see the
IndigoVision Web Configuration Guide.
For supply voltages less than 24Vdc, no external resistor is
required as the unit has an internal resistor fitted. The input
voltage (Vin) must be less than 1Vdc, or open circuit, for a logic
low, and greater than 4Vdc for a logic high.
Example 1 — Normally Closed Contact
V
IN
DX.+
DX.-
Normally closed
contact
4 - 24V
Internal resistor
already fitted
Figure 12
Normally closed contact
