4 Notification Appliances—SCM Synchronization (Sync) Control Module
The UL Listed rated input voltage is 20-31 VDC using either filtered
(regulated) DC or unfiltered (unregulated) Full-Wave Rectified (FWR)
voltage. To verify that the signaling device is operating at rated voltages,
determine the voltage drop caused by the resistance of the Notification
Appliance Circuit (NAC) wiring. Then, subtract this voltage from both
the maximum and minimum power supply and battery voltages. The flash
rate induced by the sync control module is one flash per second across a
voltage range of 20-31 VDC/FWR.
Note: Sync strobes and sync control modules are not designed to be used
on coded systems in which the applied voltage is cycled on and off.
This equipment has been tested and complies with the limits for a Class B
digital device, pursuant to Part 15 of the FCC rules. These limits are
designed to provide reasonable protection against harmful interference in
installations. This equipment generates, uses, and radiates radio frequency
energy. If not installed and used in accordance with the instructions, this
equipment may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by turning the
sync strobe and/or audible equipment off and on, the user is encouraged to
try to correct the interference by one or more of the following measures:
1.
Reorient or relocate the receiving antenna.
2.
Increase the separation between the equipment and receiver.
3.
Consult the dealer or an experienced radio/TV technician for help.
!
CAUTION:
Equipment damage hazard. Although UL
testing has verified these products function at 80%
of their minimum rating and 110% of their
maximum rating, Johnson Controls recommends
that the voltage applied to these products be within
their rated input voltage range. The application of
improper voltage may result in degraded operation
or damage to these products.
Table 1: SCM Series Sync Control Module Specifications
Model
Nominal Voltage
(VDC)
Rated Input
Voltage (VDC)
Mounting
Option
SCM-24-R
24
20-31
A
Note: Ratings per UL 1971.