Schneider ASP840000 Power Supply

This power supply provides stable DC energy for TSX Series PLC backplanes. It converts AC mains voltage into regulated outputs for logic and I/O circuits. You can rely on this unit for continuous operation in industrial automation systems.

Technical Specifications

Parameter	Value
Model	Schneider ASP840000
Category	Power Supply
Input Voltage	85–264 VAC (47–63 Hz) or 110–300 VDC
Output Voltage 1	+5 VDC at 8.0 Amps (logic)
Output Voltage 2	+24 VDC at 1.2 Amps (I/O)
Output Voltage 3	-5 VDC at 0.1 Amps (auxiliary)
Total Output Power	55 Watts maximum
Inrush Current	25 Amps peak at 115 VAC
Hold-up Time	20 ms minimum at full load
Efficiency	80% typical at nominal load
Ripple and Noise	<30 mV peak-to-peak on +5 VDC
Dimensions (W x H x D)	5.5 cm × 13.5 cm × 13.2 cm
Weight	0.92 kg (2.03 lbs)
Connector Type	One 6-pin removable terminal block
Component Count	1 main board + 1 transformer + 2 large heatsinks + 2 LEDs
Energy Storage	1500 µF primary capacitor (400 V rating)
Protection	Short-circuit, overcurrent, and overtemperature
Cooling	Internal fan (thermostat controlled)

Output Design and Distribution

The Schneider ASP840000 delivers three fully regulated DC outputs for the rack. A +5 VDC rail provides 8.0 Amps for all backplane logic and CPU circuits. The +24 VDC output delivers 1.2 Amps for field sensors and relays. An additional -5 VDC rail supports legacy TSX series communication modules.

Power Performance Characteristics

This supply maintains 80% typical efficiency across a wide load range. It holds up the +5 VDC output for 20 milliseconds after input power loss. Consequently, your CPU continues operating through most momentary line disturbances. The unit draws a peak inrush current of 25 Amps at 115 VAC.

Installation and Compatibility

Mount this power supply in the leftmost slot of any TSX Series 7 or 17 rack. The 6-pin terminal block accepts solid or stranded wires from 12 to 22 AWG. This module replaces older ASP840001 and ASP840002 units directly. You do not need any wiring changes for simple retrofits.

Energy Storage and Filtering

A 1500 µF primary capacitor stores enough energy for the hold-up time specification. This large capacitor also filters incoming AC line noise effectively. The supply requires no external batteries or additional energy storage devices. Therefore, you get a maintenance-free power solution for your TSX PLC system.

Thermal and Protection Features

The supply includes automatic overcurrent protection on all three output rails. Short-circuit conditions will not damage the module or the backplane. An internal thermostat activates the cooling fan when the unit exceeds 50°C. Two LEDs on the front panel indicate power-good status for the main outputs.

Active Cooling Design

An internal fan provides forced-air cooling for high-power operation. The fan turns on only when the internal temperature reaches 50°C. This design reduces noise and extends fan life during low-load conditions. For best results, maintain 5 cm clearance around all ventilation openings.

Why Choose This Supply

System integrators prefer this power supply for its generous 8.0 Amp +5 VDC capacity. You can power large TSX racks with many I/O modules comfortably. Therefore, this unit works perfectly for complex automation cells and process control systems.