BA-440 DualBeam Barcode Reader Quickstart Guide Ver 5
13. Test Wiegand output with Verifier, continued
The Green, Red, and Yellow LED indicators are ounted on the rear of the circuit board. Look behind the left side
of the Verifier for the LED indicators as shown here.
The LED's are located in this position in an atte pt to keep the out of direct sunlight. You ay still need to shade
the with your hand if the Sun shines directly on the .
To use the Wiegand verifier function with the odule ounted on a BA-440, turn the "test" switch ON,
which is down toward the arrow. The Green, Red, and Yellow LED's on the left side of the board will
blink once in sequence to show that the verifier is ready. Re e ber that the LED's are behind the
circuit board as shown, you should stand behind the reader to see the clearly.
NOTE: To preserve battery life, the verifier circuit will run for 10 inutes after the switch is ON, then it will go into
power saving ode (hibernation). To reactivate the verifier, turn the TEST switch OFF, wait for 5 seconds, then ON
again. The 3 LED's will blink once in sequence to show that the circuit is live.
Once the TEST switch is ON and you have seen the LED's blink, watch the Verifier LED’s when a decal is read:
No LED’s blinking - 1. Check the voltage on Data 0 and Data 1 to see if there is 5 VDC present. If no voltage is found or if voltage is
less than 3 Vdc, Wiegand essages cannot be sent. Be sure the access syste is connected and turned ON.
2. If voltage easures 5 Vdc, check to see if Wiegand essages are being sent by the reader by observing the
Data0 and Data1 LED’s on the Decoder circuit board. If these are not blinking, no essages are being sent.
3. If Data 0 and Data1 LED’s on the reader are blinking but the Verifier does not then there is no essage output
fro the reader to detect.
Green LED Only blinking - This indicates a 26 bit Wiegand essage is detected with valid parity.
A ber LED Only blinking - This indicates a 26 bit Wiegand essage is detected with bad parity. Usually this eans that the Data 0
and Data 1 connections are reversed, so try reversing the Data 0 and Data 1 leads on the Verifier and see if
the Green LED blinks.
Red LED Only blinking - 1. This indicates that the Verifier is detecting less than 26 bits or ore than 26 bits in a group. Since this is not a
valid essage the Red LED will blink. Check voltages on Data 0 and Data 1 - if either one is 0 or less than 3
Vdc that ay be the proble .
2. If red blinks occur when no Wiegand essage is sent by the reader there ay be electrical interference on the
co unication line. This interference ay be caused by a power line too close to the co unications cable or
a disconnected shield.
Green
Red
Yellow
