User manual

Copyright © 2010, International Technologies & Systems Corporation. All Rights Reserved
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ID TECH EzWriter
USB-RS232:
The USB interface uses PC compatible communication drivers, which emulate an RS232
COM port operation through a USB serial connection. This approach allows the
application to use the more available USB connections through a virtual COM port.
A 6.0’ cable with a Serial A Plug and a 2.1 mm, center-positive power Jack molded into a
pigtail of the cable. The following is the signal pin-out of the connector:
USB connector
PIN Signal Direction
1 USB +5V In
2 -Data In/out
3 +Data In/out
4 Ground --
CASE Chassis ground Connected to cover
POWER JACK
Center pin +24VDC In
Ring Signal Ground
1
--
Table 2 USB cable
1 - The power jack ground is connected to the USB connector ground.