Metrologic Instruments MLPN 2168 Manuel D’Utilisation

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Appendix B (Continued) 
Version A15 Pin Assignments for the Mil spec Connector 
Each TECH 8 scanner has a 19-pin male Mil spec connector that is found on the side of the unit. 
To connect the scanner to the host device, use a communication cable with a female Mil spec 
connector.  The communication cable may include a power transformer or it may be designed to 
draw power directly from the host device.  This item can be ordered when the scanner is 
purchased. 
The following is a list of pin assignments for Version A15 scanners.  The communication 
protocol for Version A15 is light pen emulation.  The pin numbers are impressed on the male Mil 
spec connector. For easier reference, refer to Figure 4 for pin locations. 
PIN 
FUNCTION 
R Data 



Light Pen Data Output 
Signal Ground 
Light Pen Source + 5 VDC 
R Data Return 
RS-232 Output 
Clock In 
Clock In Return 
Clock Out 
Shield Ground 
DTR Input 
Clock Out Return 
Power to Scanner + 24 VDC 
Earth Ground 
Power Ground 
RS-232 Input 
Figure 4 
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