6-15
The panel, battery-backed, unregulated dc bulk power is available from the SPS via the
NAC and the 24V Aux power terminals (1 pair only, as in Figure 6-8). NACs not
configured as switched outputs may be configured as auxiliary power point type in the
4100 Programmer. All of these are power-limited.
Review the following guidelines before using the SPS for auxiliary power:
{xe "wiring: SPS auxiliary power"}{xe "wiring: RPS auxiliary power"}{xe "remote power
supply (RPS): wiring, auxiliary power"}{xe "system power supply (SPS): wiring,
auxiliary power"}{xe "wiring: auxiliary power"}{xe "auxiliary power: RPS"}{xe
"auxiliary power: SPS"}
Voltage rating: 24 VDC (nominal), 2 V P-P ripple (maximum).
The total auxiliary current available for non-alarm is 5 A. The total current available
for the entire SPS is 9 A, including NAC, auxiliary, and card power.
All wiring is 0.75 mm
2
to 4 mm
2
.
All SPS powered field wiring requires a ferrite bead (refer Fig 6.1).
All wiring that leaves the building requires overvoltage protection. Install
module 2081-9044 wherever wire enters or exits the building. A maximum of
four 2081-9044 Modules may be connected to one channel.
When a NAC is configured as an auxiliary power circuit, no end-of-line resistor
is used.
External wiring is not supervised unless an end-of-line relay is wired, coil to
auxiliary power, and Normally Open contacts are monitored by a system power
point. Relay current must be considered as part of the load.
Programming is required for the dedicated Auxiliary Power output (TB3).
The following devices may be connected to the 2A Auxiliary Power:
- 2190-series monitor and signal ZAMs
- 4090-series IDNet ZAMs
- 4098-series four-wire smoke detectors and duct detectors
- 4190-9050 4-20 mA MZAM
- 4603-9101 LCD Annunciator
The Auxiliary Power output is rated at 2 A dc.
Where multiple loads are to be connected with individual protection, a Fused DC
Distribution board may be fitted directly to the SPS bracket adjacent to TB3.
Continued on next page
SPS Auxiliary Power Wiring
Overview
Guidelines
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