uPASS Access | installation guide
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3.5 Tamper switch
An internal magnet provides tamper indication when the reader is dismounted. This contact may be connected to an
external alarm system. The contacts are normally closed when the reader is in place.
Tamper switches of multiple readers can be connected in series
Connections
Tamper switch (normally closed)
Shield connected to DC-ground. Connect to metal case of the external device.
Contact ratings
Max. current 50 mA (0.5 Volt voltage drop)
Max. switching voltage +24 VDC
OSDP firmware
The tamper switch status is NOT reported through OSDP communication protocol
Notes
• Use shielded cable (2 x 0.25 mm
2
) when extending the wiring beyond the standard 5 meter cable.
• Maximum cable length 150 meters (
500 feet).
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