CITIZEN CT-S851 - Manual (Page 18)

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Rear connectors
z Interface connector (serial, parallel, USB, etc.)
Connects to the interface cable.
The serial interface board is equipped with a DIP switch.
z Cash drawer kick-out connector
Connects to the cable from the cash drawer.
z Power connector (AC adapter type)
Connects to the AC adapter cable.
z External device connector
Connects to the cable from an external device.
*Remove the protective seal from the external device connector to use it.
z AC inlet (built-in power supply type)
Connects to the AC power cord.
Interface connector
(serial, parallel, USB, etc.)
Cash drawer
kick-out
connector
Power connector (AC adapter type)
External device connector
AC inlet (built-in power supply type)
Protective seal