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4-12
Class B Supervised Input Circuits
Figure 4-5 shows Class B supervised wiring from a fire alarm control panel to the HPF902ULADA.
Use an EOL resistor as shown to enable notification appliance circuit input supervision. Some panels use EOLs
that have a different value from the 4.7k ohm EOL resistor used by the HPF902ULADA. In this case, the EOL
must be UL listed for the fire alarm control panel (not the HPF902ULADA).
Figure 4-5 Class B Supervised Input/Output Connections
4.6
Ground Fault Detection Enable/Disable Jumper
In some cases the ground fault detection feature on the HPF902ULADA may interfere with the ground fault
detection feature of the main control panel in the system. To disable the ground fault detection feature on the
HPF902ULADA, place the jumper block on J1, across Pins 1 and 2 (see Figure 4-2).
4.7
Battery Connection
Use two 12 VDC, 7 AH gel cell batteries inside the HPF902ULADA cabinet. For batteries larger than 7 AH (not
to exceed 35 AH) use the RBB Remote Battery Box. It is recommended that you replace the batteries every five
years. The following steps and diagram explain how to connect the batteries.
1.
Connect the black wire from the Battery – terminal to the negative (–) side of Battery #2.
2.
Connect the jumper wire provided (PN 140694) from the positive (+) side of Battery #2 to the negative side
of Battery #1.
