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. 742-8824
Mfr. Part No.ABL2REM24015
$21.48
Each
units
ABL Series - - 24V - 35W - - - - - -
RS Stock No. 510-1502
Mfr. Part No.CJ1W-PA205R
BrandOmron
$468.70
Each
units
CJ1W CJ1M Series 85 → 264 V ac 5 V dc, 24 V dc 5 A 25W 81.6mm 90mm 80mm 0°C +55°C 81.6 x 90 x 80 mm
RS Stock No. 623-7674
Mfr. Part No.VBP-HH1-V3.0
$590.58
Each
units
VAR AS-I 26.5 → 31.6 V - 60 mA - 22.5mm 99mm 92mm 0°C +55°C 22.5 x 99 x 92 mm
RS Stock No. 647-2502
Mfr. Part No.Q61P
$265.86
Each
units
Q61 PSU Series, Q Series 100 → 240 V ac 5V dc 6 A - - - - 0°C +55°C -
RS Stock No. 827-5378
Mfr. Part No.9410
$203.47
Each
units
9400 - 21.6 → 26.4 V dc 25.9V dc 4 A 96W 109mm 23.5mm 104mm -20°C +60°C 109 x 23.5 x 104 mm
RS Stock No. 135-5202
Mfr. Part No.140CPS12420
$2,228.38
Each
units
- Modicon PLC - - - - - - - - - -
RS Stock No. 135-5213
Mfr. Part No.140CPS11420
$1,977.19
Each
units
- Modicon PLC - - - - - - - - - -
RS Stock No. 868-7377
Mfr. Part No.750-610
BrandWago
$49.38
Each
units
750 I/O Module 24 V dc - - - 64mm 12mm 100mm 0°C +60°C 64 x 12 x 100 mm
RS Stock No. 614-0643
Mfr. Part No.6GK5791-1PS00-0AA6
BrandSiemens
$1,143.32
Each
units
PS791 SCALANCE 90 → 265 V ac 24V dc 420 mA 10W 125mm 60mm 130mm -20°C +60°C 125 x 60 x 130 mm
RS Stock No. 455-6664
Mfr. Part No.Q63P
BrandMitsubishi
$494.18
Each
units
Q63 MELSEC Q Series 24 V dc 5V dc 6 A - 55.2mm 98mm 90mm - - 55.2 x 98 x 90 mm
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