Inputs - Datalogic DS2200 Reference Manual

2
2.3.4

Inputs

The inputs available on the connector supplied with the scanner are indicated below:
Pin
19
22
The EXT TRIG input is used to connect the external trigger which tells the scanner to
scan for a code. The active state of this input is selected in software. Refer to the
WinHost Help On Line.
The yellow LED (Figure A, 5) is on when EXT TRIG- is shorted to I/O REF.
This input was designed to be driven by an NPN type command. The connections
are indicated in the following diagram:
This input can be driven by an independently powered source, but the signal on
EXT TRIG- must not exceed 9 Vdc.
An anti-disturbance hardware filter is implemented on the External Trigger input (< 5
milliseconds delay).
An additional 15 ms (typical) delay can be implemented through a dedicated software
parameter (refer to WinHost Help On Line).
10
DS2200
3
RXAUX
2
TXAUX
7
SGND
Figure 7 - RS232 auxiliary interface connections
Name
EXT TRIG-
I/O REF
DS2200
9/13
+ 5V
47K
19
22
Figure 8 - External Trigger Input command
USER INTERFACE
TXD
RXD
SGND
Function
external trigger (input -)
I/O reference
EXTERNAL TRIGGER
VS = 5 Vdc
V
EXT TRIG-
Ground
I/O REF
DS2200
Signal