NCR RealPOS User Manual - Connecting Power

3-6 

Chapter 3: Installation 

Connecting Power 

1.  Verify that you have the correct Power Module for your electrical outlet. 

2.  Connect the power connector to the Interface Cable. Depending on the installation, this 

may be a connector on the cable or a box on the end of the cable. 

3.  Plug the Power Module into an electrical outlet. When the 7893 receives power, the 

diagnostics checks various hardware components. If the scanner passes the diagnostic 

tests, it gives a "ready" indication (four flashes of the LED Status Indicator). A green flash 

followed by a red flash is normal and indicates the scanner serial number is stored in the 

scanner’s EEPROM. 

Note:

If the 7893 is receiving power from the host terminal, do not connect the Power 

Module. 

27474

Host Terminal

7893 Scanner

Scanner Cable

Dongle Adapter Cable

Interface Box

Warning:  When the host terminal powers the 7893, do not plug the unit in live. This can 

cause the Power Supply in the host terminal to shut down and may also blow an internal 

fuse in the host terminal. Be sure to turn off the power to the host terminal before 

connecting the 7893.