UNC500 Hardware Manual V1.3
RBH Access Technologies Inc.
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30
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N I R C 2 0 0 0 & N U R C 2 0 0 0
The NIRC2000 uses an IRC2000 board and the NURC2000 uses a URC2000 board to provide most of
the functionality of the RC2 board to the Axiom system. The NIRC2000 and NURC2000 firmware is
based on RC firmware so that they will have the same features (as much as possible).
Modification
Due to the lack of internal power supply and fewer I/O lines the NIRC2000 and NURC2000 do not
provide the following functionality:
Reader Tamper
The reader tamper inputs can be used to monitor AC failure and low battery. Reader “A” tamper is used
for AC voltage detection and should be shorted to ground to avoid “AC FAIL” message, if the power
supply modifications are not done. Reader “B” tamper is used for battery voltage detection and should be
left open to avoid the “BATTERY FAIL” message, if the power supply modifications are not done.
Cabinet Tamper
Cabinet Tamper always reports normal.
Fuse monitoring
Due to the lack of a power supply Fuse Monitoring always normal.
Dual RS485 Redundant Communications
Both panels only have a single channel so they must be wired differently.
Technical bulletin TB53
will show how to modify the NIRC2000 board and how to connect to the power
supply to monitor for ‘Battery Low’ and ‘AC Failure’.
*** For ULC-S319-05 III compliance, all wiring into the chassis mount panel’s cabinet must enter
through metal conduit. Also be sure to mount the panel in a protected area.
*** For ULC-S319-05 III compliance, the rack mount panel’s housing must have external tamper
switch to detect the housing’s removal from the rack. Also be sure to mount rack in a protected
area.
