PW7K1ICE Wiring and Setup
Memory Backup Battery
PW7K1ICE Installation and Configuration Guide
, Document 800-26497
27
Normally Closed pole (NC). When you are controlling the delivery of power to the
door strike, the Normally Open and Common poles are used. When momentarily
removing power to unlock the door, as with a mag lock, the Normally Closed and
Common poles are used. Check with local building codes for proper egress door
installation.
Door lock mechanisms can generate EMF feedback to the relay circuit that can cause
damage and premature failure of the relay plus affect the operation of the LP1501. For
this reason, it is recommended that either a diode or MOV (metal oxide varistor) be
used to protect the relay. Wire should be of sufficient gauge to avoid voltage loss.
Caution:
From the Auxiliary output, the LP1501 can provide 12 VDC power for
external devices provided that the maximum current is not exceeded. See the
specifications section for details. If a local power supply is used, it must be UL Listed
Class 2 rated
Figure 2-5: Relay Circuit Wiring Diagram
2.13 Memory Backup Battery
The SRAM is backed up by a rechargeable battery when input power is removed. This
battery should retain the data for about 2 weeks. If data in the SRAM is determined to
be corrupt after power up, all data, including flash memory, is considered invalid and
are erased. All configuration data must be re-downloaded.
Note:
The initial charge of the battery may take up to 48 hours to be fully charged.
Diode Selection:
• Diode current rating: 1x
strike count
• Diode breakdown voltage:
4x strike voltage
• For 12VDC or 24VDC
strike, diode 1N4002
(100V/1A) typical
MOV Selection:
• Clamp voltage: 1.5x VAC
RMS
• For 24VAC strike,
Panasonic ERZ-
C07DK470 typical
+
-
TB6
2-C
NC
NC
NO
1
NO
1-C
O
TB6
1
NO
1-C
NC
NC
NO
2-C
