1-7
The 4005 Power Supply/Charger provides up to 4 Amps of 24VDC external
power. The power supply has a power-limited signal power tap that feeds the
I/O cards as well as a current-limited system 24V tap. The power supply acts as
a charger for sealed lead-acid batteries up to 33Ah capacity. The power supply
provides a depleted battery detection and optional cutout that prevents the
unintentional activation of NACs. The 4005 will annunciate a depleted battery
trouble when the battery voltage drops below 19 volts.
Note: The 4005 back box only allows room for 18Ah batteries. (For
information on battery selection, refer to Engineering Document
900-012).
The following monitoring functions are provided by the power supply and
individually report to the CPU:
• Earth detect
• AC power loss
• Brownout condition
• Battery supervision
• Signal power overload
• Supply voltage monitoring
• Depleted battery detection
• Charger monitoring
The Power Distribution Board is a backplane for the I/O cards. This board
busses data and control signals between the CPU and I/O cards as well as
distribute power from the power supply to the I/O cards. An optional Expansion
Power Distribution Module is required for systems with more than five I/O cards
or when adding an Expansion Power Supply.
The Power Distribution Board also includes a terminal block connection for
auxiliary power consisting of two taps; each rated at 2 Amps.
Continued on next page
Base Panel Modules, Continued
Power Supply/Charger
Power Distribution Board
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