ELECTRICAL CONNECTIONS
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3
3.7 DIGITAL INPUTS
There are two optocoupled polarity insensitive inputs available on the reader: Input 1
(External Trigger) and Input 2, a generic input:
These inputs can be used to control (start/stop) the reading phase:
Parameter
Source
Reading Phase ON Input
Reading Phase OFF Input
Single Presence Sensor
External Trigger Leading Edge
External Trigger Trailing Edge
Two Presence Sensors
External Trigger Leading Edge
Input 2 Leading Edge
PLC Digital Output
External Trigger Leading Edge
or
Input 2 Leading Edge
External Trigger Trailing Edge
or
Input 2 Trailing Edge
NOTE:
Alternatively, host communication output commands (Serial or
Fieldbus) can be used to control the reading phase. See the Configuration
Parameters Help On Line for details.
The electrical features of both inputs are:
V
AB
= 30 Vdc max.
I
IN
= 10 mA (reader) + 12 mA (CBX) max.
The active state of these inputs is selected in software. Refer to the VisiSet™ Help On Line.
An anti-disturbance filter is implemented in software on both inputs so that the minimum
pulse duration is
0.5 milliseconds. This value can be increased through the software
parameter Debounce Filter, see the Digital I/O folder in the VisiSet™ Help On Line for further
details.
These inputs are optocoupled and can be driven by PNP type commands.
NOTE:
Polarity insensitive inputs assure full functionality even if pins A and
B are exchanged.
