2070LX Controller – User Manual 51
Version 1.0
5 2070-4A POWER SUPPLY MODULE
5.1 GENERAL DESCRIPTION
The model 2070-4A is the Power Supply module of the Controller. It receives the AC line through the AC
cord and provides all necessary power outputs and signal outputs at PS1 and PS2 connectors.
The power lines are +5VDC @ 10A, +/-12VDC @ 0.5A, isolated +12VDC @ 1A and the +5VDC Standby
power; and control signals are LINESYNC, ACFAIL/POWER DOWN and POWER UP/SYSTEM RESET.
The module is constructed in accordance to the TEES 2009. It is a self-contained, vented only by
convection. The control board and small power supply modules are enclosed by two side plates and one
rear plate forming a cage with the top and bottom not covered and used for ventilation purposes.
The Power supply module consists of:
PS1 and PS2 connectors: Provides the interface for all power and signals needed by the
controller.
LED indicators: They are ON when voltage is within tolerance, otherwise they are OFF.
ON/OFF Power switch: Provide for turning ON and OFF the module.
Slow Blow fuse: Provided to protect the module in case of exceeding the current limit.
15 inches of AC Cord and cord wraps to stow the cord when not in use.
A sub-assembly control board: contains all necessary circuitry for implementing the Power Supply
module functions.
Small power supply modules that provide all necessary power.
Harnessing: for interconnecting the small power modules to the control board.
Metal panels: provides mechanical support, necessary cutouts and identification.
Figure 9: Power Supply 2070-4A
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