CK821 Thermal POS printer User’s manual
14
5 Interface pin definitions
The printer has a cash drawer driver interface and many kinds of communication interfaces: Serial (RS-232),
USB and Ethernet ports. USB port and cash drawer interfaces are standard interfaces, and it has Ethernet, serial
and parallel ports as optional.
5.1 USB interface pin definition
（
standard B type female base)
1
）
Pin definition
Pin Number
Signal name
Typical wire color
1
VBUS
Red
2
D-
White
3
D+
Green
4
GND
Black
5.2 Power interface pin definition
（
MPC-3-001B
）
1
）
Pin definition
Pin number
Signal name
1
+24V
2
GND
3
N.C
SHELL
F.G
