User's Manual

MODEL 2130 MARKER BEACON
Rev. A April, 2005 2-19
This document contains proprietary information and such information may not be disclosed to others for any
purposes without written permission from SELEX Sistemi Integrati Inc.
2.3.4 Power Panel Assembly Theory of Operation
2.3.4.1Power Supply Theory of Operation
2.3.4.2 Battery Charging Power Supply (BCPS) Block Diagram Theory
Refer to Figure 2-5. The Battery Charge Power Supply (BCPS) CCA distributes power, performs battery charging, and
facilitates power monitoring in a single or dual Far Field Monitor (FFM) or Marker Beacon system.
The BCPS CCA receives AC line power at terminal block TB1 and immediately routes it to a fused AC outlet via the same
terminal block. AC current up for to two FFM / Marker Beacon pairs is measured via a single transformer while AC
Voltage for up to two FFM / Marker Beacon pairs is measured by two separate transformers. The secondary of each AC
Voltage sensing transformer shall light an AC_On indicator if AC is detected. The AC voltage secondary and the AC
current secondary are routed to the J1 connector for measuring by the Remote Monitoring System (RMS).
The FFM / Marker Beacon pairs are designated as System1 and System2 and are identical in operation. System1 consists
of FFM1 and Marker Beacon1 while System2 is the FFM2 /Marker Beacon2 pair. Only System1 shall be discussed further.
System1 AC power is fused, switched, and routed via terminal block TB1 to an external AC-DC power supply. The power
supply furnishes +15 VDC back to the BCPS CCA via terminal block TB2. The +15VDC is current monitored, fused, and
routed to Battery1 Charger / Changeover circuitry. A +12 VDC battery for System1 joins the Charger / Changeover
circuitry via terminal block TB2. The Charger / Changeover circuitry monitors the battery voltage/current and switches to
battery back-up power if AC power is no longer present. The Charger / Changeover circuitry also shuts off battery
backup if the battery is near depletion to prevent permanent damage to the battery.
A Battery1 disconnect switch is used for system power-down as well as battery fault testing. Battery1 indicators include
both Batt1_Fault (the battery is not connected or an open cell condition) and On_Batt1 (AC power is no longer present).
The output of the Battery1 Charger / Changeover circuitry is routed to two switches, one each for FFM1 and Marker
Beacon1. An indicator for each DC output is lit if the corresponding switch is activated and DC power for each is routed
to terminal block TB2.
Figure 2-5 FFM / Marker Beacon BCPS Block Diagram