2-12
The Switcher Power Supply converts 120/220/240VAC input line voltage into
28 volt DC power. The supply provides brownout detection status to the Power
I/O Interface board.
A relay permits the Standard Slave to select power from either the Power Supply
or battery. An over voltage protection circuit supervises the DC output to
prevent system sub-assembly damage.
The Power Supply:
• Converts 120 or 240 VAC to 28 VDC
• Provides battery changeover circuitry (controlled by Slave)
• Monitors batteries under the control of the Standard Slave
• Detects brownout or AC power loss and reports it to the Standard Slave
Note: Brownout is NOT Field adjustable.
Two basic Power Supply assemblies exist for specific usage
1. 636-341 Universal Switcher Power Supply (Gold Wing)
• 565-368 Standard Slave PCB with U11 741-033 software
• 565-256 Power I/O Interface PCB assembly
2. 636-289 Power Supply (Black Hawk) or 636-370 w/charger adapter
• 565-222 Standard Slave PCB with U11 741-008 software
• 565-220 Power I/O Interface
Caution: DO NOT OPEN switcher. The switcher is not field serviceable
and contains lethal, high voltage.
Table 2-7 describes the I/O connectors on the 636-341 Power Supply (Gold
Wing Supply).
Table 2-7. 636-341 (Gold Wing) Power Supply I/O Connectors
Label Description
P1 AC Input and Voltage Select Jumper
P2 Power I/O Interface Interconnections (status & control 28UPS)
TB1 28.5VDC Output To Power I/O Interface Board
Battery Harness: Battery Charger Output & Battery Power Input
Table 2-8 describes the I/O connectors on the 636-289 Power Supply (Black
Hawk Supply).
Table 2-8. 636-289 (Black Hawk) Power Supply I/O Connectors
Label Description
J1 Control & Supervision Signals
J3 +24UPS / AC Power Status
P1 Battery Harness
P4 B-tap Voltage To Power I/O Board
P5 A-tap Voltage To Power I/O Board
4020 Power Supply
Description
Power Supply Functions
Application
Power Supply I/O Connectors
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