PLC Power Supplies

A programmable logic controller (PLC) is a specialised computer which has been adapted for the control of industrial processes such as robotic devices and assembly lines. PLC power supplies are components of PLCs that convert relatively high input source power into lower regulated voltages required for the internal circuitry in PLCs.

How do PLC power supplies work?
The PLC power supply gets input power from an external line voltage, which is usually fed through a control relay and filter external to the PLC. The line voltage is stepped-down, filtered, rectified, regulated, status-monitored and voltage and current protected. Some PLC power supplies are embedded with switches for selecting a particular programming mode or protecting the memory.

The resulting low DC voltage output powers the PLC’s various modules as well as the PLC's integral battery (which is used for memory back up). Should the input line voltage drop or the PLC power supply fail, the memory contents will not change thanks to the memory backup.

What are PLC power supplies used for?
PLC power supplies are essential components required to run a PLC.

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Description Price Manufacturer Series For Use With Line Voltage User Power Output Voltage Output Current Output Power Length Width Depth Minimum Operating Temperature Maximum Operating Temperature Dimensions
RS Stock No. 698-7376
Mfr. Part No.1747-BA
£130.00
Each
Units
1747 RSLogix 500 - - - - - - - 0°C +60°C -
RS Stock No. 698-7708
Mfr. Part No.1769-PA4
£276.00
Each
Units
1769 Series Compact I/O Module 85 → 265 V ac 24 V dc, 5 V dc 4 A - 70mm 118mm 87mm 0°C +60°C 70 x 118 x 87 mm
RS Stock No. 698-7326
Mfr. Part No.1746-P2
£656.00
Each
Units
SLC 500 - 170 → 265 V ac, 85 to132 V ac 24 V dc, 5 V dc 5 A - 74mm 140mm 145mm 0°C +60°C 74 x 140 x 145 mm
RS Stock No. 750-8630
Mfr. Part No.2080-PS120-240VAC
£48.80
Each
Units
Micro 800 Micro800 Series 120 → 240 V ac - - - - - - - - -
RS Stock No. 698-7335
Mfr. Part No.1746-P3
£534.00
Each
Units
SLC 500 - 19.2 → 28.8 V dc 24 V dc, 5 V dc 3.6 A - 74mm 140mm 145mm 0°C +60°C 74 x 140 x 145 mm
RS Stock No. 698-7717
Mfr. Part No.1769-PB4
£276.00
Each
Units
1769 Series Compact I/O Module 19.2 → 31.2 V dc 24 V dc, 5 V dc 4 A - 70mm 118mm 87mm 0°C +60°C 70 x 118 x 87 mm
RS Stock No. 698-7587
Mfr. Part No.1769-PB2
£167.00
Each
Units
1769 Series Compact I/O Module 19.2 → 31.2 V dc 5 V dc, 24 V dc 2 A - 70mm 118mm 87mm 0°C +60°C 70 x 118 x 87 mm
RS Stock No. 698-7322
Mfr. Part No.1746-P1
£503.00
Each
Units
SLC 500 - 170 → 265 V ac, 85 to132 V ac 24 V dc, 5 V dc 2 A - 58mm 140mm 145mm 0°C +60°C 58 x 140 x 145 mm
RS Stock No. 698-7782
Mfr. Part No.1763-BA
£40.30
Each
Units
- MicroLogix 1100 Series - - - - - - - - - -
RS Stock No. 698-7578
Mfr. Part No.1769-PA2
£167.00
Each
Units
1769 Series Compact I/O Module 85 → 265 V ac 5 V dc, 24 V dc 2 A - 70mm 118mm 87mm 0°C +60°C 70 x 118 x 87 mm
RS Stock No. 698-7773
Mfr. Part No.1763-L16AWA
£533.00
Each
Units
1763 MicroLogix 1100 Series - - - - 87mm 110mm 90mm -20°C +65°C 87 x 110 x 90 mm