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IMPORTANT: Electronic devices are susceptible to lightning and power station electrical surges from both the AC outlet and the
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telephone line. It is recommended that a surge protector be installed to protect against such surges.
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1. When the reader is powered up a victory beep (4-quick beeps) is heard and the LED stays Red.
2. Present the correct card and the reader will beep once and LED will flash on and off. It is up to the control panel to
control dual LED and have the LED turn green when an enrolled card is presented.
If reader does not recognize the card/tag (no beep, no LED flash) or reader has short read range, please see table below
for possible causes and solutions.
Possible Cause
Incorrect wiring
Not enough power
Mounted near electromagnetic interference
Incorrect card used
Reader/access panel not properly grounded
Supply generating electromagnetic interference
If any of the corrective actions mentioned above don't work, please disconnect the reader from panel and power it with a
separate power supply or 9V battery and test card functionality. By powering it individually and off the installation most vari-
ables that can cause malfunction are eliminated. If after the reader is powered by a separate power source the failure per-
sist, please contact Viking Electronics Product Support.
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Due to the dynamic nature of the product design, the information contained in this document is subject to change without notice. Viking Electronics, and its affiliates and/or
subsidiaries assume no responsibility for errors and omissions contained in this information. Revisions of this document or new editions of it may be issued to incorporate
such changes.
DOD# 221
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Corrective Action
Verify wiring connection
12 VDC suggested
Relocate or provide greater separation from
Verify card compatibility from model number
Quality Earth Ground needed. Verify shield line from the access panel to the
reader is one continuous, connected line.
Linear power supply recommended
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Printed in the U.S.A.
Typical Wiegand Connections
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