DS2200
2
7SGND SGND
TXD
RXAUX
3
RXD
TXAUX
2
USER INTERFACE
DS2200
Figure 7 - RS232 auxiliary interface connections
The inputs available on the connector supplied with the scanner are indicated below:
Pin Name Function
19 EXT TRIG- external trigger (input -)
22 I/O REF I/O reference
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:
Signal
EXT TRIG-
19
VS = 5 Vdc
9/13
22 I/O REF Ground
EXTERNAL TRIGGE
R
DS2200
V
+ 5V
47K
Figure 8 - External Trigger Input command
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