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4-10
A typical application of the trouble relay is to connect the HPF902ULADA normally closed (N.C.) contacts in
series with the EOL supplied with the fire alarm control panel. This will cause a trouble on the fire alarm control
panel when the HPF902ULADA opens its trouble contacts.
Note:
The N.C. contact is the contact that is closed when the HPF902ULADA has power and there are no trouble conditions.
Figure 4-3 Trouble Relay Connection Example
4.5
Notification Appliance Wiring
Note:
Not all devices can use the sync feature. Be sure to check Appendix A to ensure the device you have chosen will work
with this feature.
4.5.1
Class A Supervised Wiring
Figure 4-4 shows how to wire for Class A input and output supervision. Use in/out wiring methods for proper
supervision. (Refer to Appendix A for notification appliances compatible with the HPF902ULADA.)
Class A Output Notification Circuits
The configuration shown in Figure 4-4 shows two, 3 A devices wired as Class A. When using the outputs as
Class A circuits, loop the wiring back to the corresponding circuit pair. For Class A wiring, no external EOL is
necessary since it is built into the HPF902ULADA board.
Class A Supervised Input Circuits
The configuration shown in Figure 4-4 shows Class A supervised wiring from a fire alarm control panel to the
HPF902ULADA board. Pay close attention to the polarities when wiring a panel to the HPF902ULADA and
follow these requirements:
•
When wiring to Terminal 18 on the HPF902ULADA, you must use two separate wires. Do not loop a single
Important!
For all synchronization options, input 1 is the strobe input and input 2 is the audible input. The signals to input 1 and input 2
must be DC signals for the synchronization patterns to work properly. When it is desired to activate both strobes and audibles,
input 1 and input 2 must be active. If it is desired to only activate strobes, then input 1 must be active and input 2 must be
inactive. The audible can be deactivated and reactivated at any time by changing the signal at input 2 as long as input 1
remains active. If input 1 is not active, then input 2 is ignored.
Must be connected to
a power limited source
Summary of Contents for HPF902ULADA
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