Two Stage Operation; Synchronized Nac Operation - Honeywell MS-5UD Series Manual

The programmer can select the notification appliance output by pressing the number
corresponding to the desired output. The coding selections are:
• Steady - a continuous output with no coding
• March Time - 120 ppm (pulse-per-minute) output
• California - 10 seconds on and 5 seconds off
• Temporal - ½ second on, ½ second off, ½ second on, ½ second off, ½ second on, 1½ second
off
• Two Stage 3 Minutes or 5 Minutes - refer to "Two Stage Operation" on page 69 for a
description of this feature
• Synchronized output for System Sensor, Wheelock, Gentex, Faraday or Amseco - Refer to
"Synchronized NAC Operation" on page 69 for additional information
Selection of one of the above options will cause the control panel to store the information in
memory and return the display to NAC Screen #1, which will display the new coding choice.

3.5.2.2.1 Two Stage Operation

Two Stage operation consists of the following:
•
•
If Two Stage operation is programmed as the Coding option, the following sequence of events
will occur during an alarm.
1. The on-board NACs will activate with a 1st stage output upon activation of any alarm
2. If, after the programmed time of 3 or 5 minutes, the Acknowledge switch has not been
3. If an Acknowledge switch has been pressed, any NACs currently in 1st stage activation
4. If another alarm point is activated and the countdown timer is counting, the alarm point
5. If another alarm point is activated and the countdown timer has stopped counting due to

3.5.2.2.2 Synchronized NAC Operation

Synchronization is a panel 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 or confusion. The FACP can be programmed to operate with a variety of manufacturer's
devices.
MS-5UD/MS-10UD Series PN 52626:B 8/01/2008
1st stage output - 20 ppm (pulse-per-minute) coding
2nd stage output - Temporal coding as described above
pressed, all NACs presently in 1st stage activation will go to 2nd stage activation
will remain in 1st stage. Pressing the Acknowledge switch does not affect NACs already
in 2nd stage activation
will have no effect on the NACs
the Acknowledge switch being pressed, the countdown timer will restart and the NACs
will respond as outlined in step 1. NACs already in 2nd stage activation will not be
affected
Programming
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