Citizen CT-S751 User Manual page 45

Names of parts
1. Panel button
Control this interface board.
2. USB port for peripheral device connection (3 ports)
Connect a peripheral device.
3. USB port for Apple device connection (1 port)
Connect an Apple device.
Data can be transmitted even during fast charging of Apple devices.
4. Green LED
This LED indicates the communication status with the printer.
5. Red LED
This LED indicates the connection status with an Apple device.
CAUTION
 Only connect peripheral devices specified by our company to the USB port.
 Only plug in/remove peripheral devices when the printer power is turned off.
 Operation of this board will start about 30 seconds after the power is turned on.
 Use an MFi certified cable for connection with an Apple device.
1 2
45
— —
4 3 5