Datalogic DS8100A, Справочное руководство

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CBX ELECTRICAL CONNECTIONS
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3
3.4 INPUTS
There are four optocoupled polarity insensitive inputs available on the scanner: Input 1
(External Trigger/PS), Input 2 (Encoder), Input 3 and 4 generic inputs.
The electrical features of the inputs are:
Maximum voltage: 30 Vdc
Maximum current Input 1 and 2: 12 mA (scanner) + 12 mA (CBX)
Maximum current Input 3 and 4: 12 mA (scanner)
CBX100/500 Function
+V Power Source - External Trigger
I1A External Trigger A (polarity insensitive) for PS
I1B External Trigger B (polarity insensitive) for PS
I2A Input 2 A (polarity insensitive) for Encoder
I2B Input 2 B (polarity insensitive) for Encoder
I3A
(CBX500 only)
Input 3 A (polarity insensitive)
I4A
(CBX500 only)
Input 4 A (polarity insensitive)
I34B
(CBX500 only)
Common Reference for Inputs 3 and 4 (polarity insensitive)
-V Power Reference - External Trigger
The active state of all the inputs is selected in software (open or closed). Refer to the
Genius™ Help On Line.
All inputs are optocoupled, polarity insensitive, and driven by a constant current generator;
the command signal is filtered through an anti-disturbance circuit which generates a
debouncing delay which can be set to 5 ms or 500 s. In particular, I1 for PS, I3 and I4 share
the same value which usually corresponds to 5 ms when using a photoelectric sensor, while
I2 is set to 500 s when this input is used for the Encoder. The maximum Encoder frequency
is
2 kHz .
Input 1 (External Trigger/PS) is used in the On-
Line and PackTrack™ operating Modes and
tells the scanner to scan for a code. The yellow Phase On LED (Figure C, 3) which refers to
Input 1 is on only when current flows through the input circuit and therefore when the active
state of this input is set to "active open", the LED lights up when the input corresponds to
OFF.
Input 2 is normally used for the Enco
der input. In PackTrack™ mode, it detects the conveyor
speed.
Inputs 3 and 4 can be used as the stop signal for the reading phase.
The debouncing delay value can be changed through the software parameter
Debouncing for
Input x , see the "6-8 K Software Configuration Parameter Guide
” or Help file.
Powering Inputs
Input devices can be supplied by either scanner power (V+ and V-) or external power
supplies (Vext).
Electrical isolation between the input command logic and the scanner is maintained when
powering the input devices from an external supply voltage (Vext).