Wiegand Interface Unit Four State (WIU-4)
Installation Manual
18
Troubleshooting the WIU-4
If the operation of a component is in doubt, substitute a
known good component and retry the system.
Always verify wiring against the wiring diagrams before
powering up the system.
Regulatory approvals
UL
The following are the results of the UL evaluation of the
WIU-4:
• Operating temperature range: +32
o
F to +120
o
F
(+0
o
C to +49
o
C)
• Relative humidity: 85%
• Input voltage range: 9 to 16 VDC, 55 mA or higher
to ensure the measured 60 mA is within 110% of the
current rating.
• For UL Listed installations, the WIU-4 must be
mounted within the protected area of a protective
enclosure.
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