5
4. Connecting
4-1. Power
The scanner requires a minimum of 250mA at 5 VDC power. The interface cable
that comes with the scanner supports both direct power (where the scanner takes
power from the host machine) and external power (that’s what the supplied power
adapter is for). A sufficiently robust POS system can support a scanner
successfully without external power; a POS system with a barely adequate power
supply may produce erratic performance (either of the POS system itself, or of the
scanner, or both) when a scanner is attached. Unless you are sure your POS
system can candle such loading, it is recommended that you use the supplied
power adapter. When an external adapter is connected, the scanner does not
take power from the host.
The scanner turns on when power is supplied, and turns off when power is
removed. There is no on/off switch on the scanner itself.
Use only an AC/DC power adapter approved for the scanner. Use of other
power supplies may cause damage to the scanner, and void the factory warranty.
4-2. Verifying Scanner Operation
Please follow the procedure below to verify scanning operation.
1. Insert the 10-pin modular plug of the Interface cable into the scanner
until a firm click is heard.
2. Plug the power adapter into the jack on Interface cable if necessary.
3. Plug the AC end of the power adapter into an AC outlet, or plug the
other end of cable into host if power adapter is not needed. The
scanner powers up, the buzzer sounds four beeps and the LED
indicator glows.
4. Present a known-good test barcode to the scanner. The scanner
should issue a short beep and the LED should flash red momentarily.
[if the scanner is connected to a keyboard wedge for this test, it
should read one barcode, beep, then remain with a red LED
indicating light. This is normal when the keyboard wedge is not
connected to a live host terminal.]
Note: if the scanner does not produce any beeps, or produces the wrong
beeps, or the LED does not light up, remove the power connection and
refer to the section on Troubleshooting.