Metrologic Instruments MS6720 - Manual (Page 10)

4
O PERATIONAL T EST
If the scanner is to receive power from an external power supply*, test the
scanner before it is connected to the host system.
Keyboard Wedge Scanners:
1. Plug one end of the coil cable into the keyboard connector on the PC.
Then plug the keyboard connector into the other end of the coil cable.
Plug in the external transformer.
2. Check the AC input requirements of the power supply to make sure the
voltage matches the AC outlet. Connect AC power to the transformer.
3. Both LEDs come on together along with the beep (the green LED only
flashes).
RS-232, Light Pen, OCIA and 46xx scanners:
1. Plug the scanner’s coil cable into the MCA (Metrologic Connector
Adapter).
2. Check the AC input requirements of the power supply to make sure the
voltage matches the AC outlet. Plug the power supply into the MCA
and the appropriate AC outlet. The outlet should be installed near the
equipment and be easily accessible.
3. Both LEDs come on together along with the beep (the green LED only
flashes).
The scanner can be powered in two ways:
• by an External Power Supply* or
• by the Host Device** i.e. the PC for the MS6720 with a Built-
in PC Keyboard Wedge interface.
Caution:
*To maintain compliance with applicable standards, all circuits connected to the scanner must meet the
requirements for SELV (Safety Extra Low Voltage) according to EN 60950.
**To maintain compliance with standard CSA C22.2 No. 950/UL 1950 and norm EN 60950, the power
source should meet applicable performance requirements for a limited power source.