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Chapter Ⅱ Wiring instructions

USB version
USB version output interface is USB-Type A public seat. The pin definition conforms
to the USB 2.0 standard. Connect directly to your computer and use it.

RS232 version
The output cable of the RS232 version has two interfaces, a DB9 socket, a USB-Type
A socket, and a USB-Type A socket is to connect the power adapter or power the
device. DB9 socket wire sequence is shown in Table 2-1.
Table 2-1 RS232 wire sequence
Interface
Functions
description USB-A DB9 interface
GND 4 5
VCC 1
RS232_RX 3
RS232_TX 2

Keyboard version
There are two interfaces for the keyboard version, one USB-Type A male and one
USB-Type A female. The USB-Type A male connector connects the power adapter to
the device and the USB-Type A female connector connects the keypad.