ID Tech EzWriter - USB-RS232 Communication Parameters; USB Cable Pin-Outs

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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.