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52 MS-9200UDLS PN 52750:E1 01/27/09
2.5.3 Style Z (Class A) NAC Wiring
2.6 Remote Synchronization Output
Synchronization is a feature that controls the activation of notification appliances in
such a way that all devices will turn on and off at exactly the same time. This is
particularly critical when activating strobes which must be synchronized to avoid
random activation and a potential hazard to individuals. Devices connected directly to
the control panel’s NACs can be synchronized as described in "Type" on page 106.
Notification appliances connected to remote power sources may require
synchronization with the FACP’s devices. This can be accomplished by connecting the
Remote Synchronization Output from TB2 of the MS-9200UDLS to a compatible sync
input of a power supply such as the FCPS-24FS6/8. The 24 VDC, 40 mA signal from
TB2 follows, that is mimics, the signal on NAC1. This allows the devices connected to
the power supply to be synchronized with the devices connected to NAC1 on the FACP.
The Remote Synchronization Output is power-limited and supervised (refer to "UL
Power-limited Wiring Requirements" on page 53). A 4.7 kΩ ELR resistor must be
connected to the end of the wiring at the remote power supply.
B
+
B
+
B
-
B
-
A
+
A
+
A
-
A
-
+
+
+
+
+
+
2 Style Z (Class A) Notification Appliance Circuits,
supervised and power-limited
Polarized Bell
Polarized Horn
Polarized Horn
Notification Appliance Circuit
polarity shown in alarm state
Polarized Bell
Polarized Strobe Polarized Strobe
Figure 2.9 NAC Style Z (Class A) Wiring
9200nacz.cdr
NAC 1
NAC 2
TB3
TB4
+ 24V -
NON-RST
POWER
+ 24V -
RST
POWER
REMOTE PWR
SUPPLY SYNC
+ -
B+ A+ A- B- B+ A+ A- B-
1B+ 3B+ 3B- 1B- 2B+ 4B+ 4B- 2B-
TB1
TB2
TB3
TB4
JP4
1
2
3
Figure 2.10 Remote Sync Output
Remote Power Supply
FACP main circuit board
Remote Sync Output
Sync Input
4.7 kΩ ELR