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. 624-1825
Mfr. Part No.F2-40BL
BrandMitsubishi
R 1,534.10
Each
units
F2-40BL FX2N Series - - - - - - - - - -
RS stock no. 698-7376
Mfr. Part No.1747-BA
R 3,231.06
Each
units
1747 RSLogix 500 - - - - - - - 0°C +60°C -
RS stock no. 647-2502
Mfr. Part No.Q61P
R 3,751.35
Each
units
Q61 PSU Series, Q Series 100 → 240 V ac 5V dc 6 A - - - - 0°C +55°C -
RS stock no. 623-7652
Mfr. Part No.VAN-115/230AC-K16
R 6,744.46
Each
units
VAN AS-I - 30.55V dc 8 A - 91mm 124mm 102mm -10°C +70°C 91 x 124 x 102 mm
RS stock no. 614-0643
Mfr. Part No.6GK5791-1PS00-0AA6
BrandSiemens
R 9,111.84
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. 624-1831
Mfr. Part No.Q6-BAT
BrandMitsubishi
R 610.80
Each
units
Q6-BAT Q Series - - - - - - - - - -
RS stock no. 455-6664
Mfr. Part No.Q63P
BrandMitsubishi
R 5,403.06
Each
units
Q63 MELSEC Q Series 24 V dc 5V dc 6 A - 55.2mm 98mm 90mm - - 55.2 x 98 x 90 mm
RS stock no. 148-010
Mfr. Part No.BMXCPS3500
R 14,146.82
Each
units
Modicon M340 Modicon M340 100 → 240 V ac 24V dc 4.5 A 36W - - - 0°C +60°C -
RS stock no. 746-6104
Mfr. Part No.3RX9501-0BA00
BrandSiemens
R 3,810.00
Each
units
3RX950 AS-I Power Supply Unit 120 V ac, 230 V ac 30V dc 3 A - 125mm 50mm 125mm - - 125 x 50 x 125 mm
RS stock no. 746-6081
Mfr. Part No.3RX9503-0BA00
BrandSiemens
R 7,200.00
Each
units
3RX950 AS-I Power Supply Unit 120 V ac, 230 → 500 V ac 30V dc 8 A - 125mm 120mm 125mm - - 125 x 120 x 125 mm
RS stock no. 147-893
Mfr. Part No.BMXCPS3020
R 14,227.71
Each
units
Modicon M340 Modicon M340 24 → 48 V dc 24V dc 4.5 A 31.2W - - - 0°C +60°C -
RS stock no. 148-026
Mfr. Part No.BMXCPS2000
R 7,217.13
Each
units
Modicon M340 Modicon M340 100 → 240 V ac 24V dc 2.5 A 20W - - - 0°C +60°C -
RS stock no. 148-048
Mfr. Part No.BMXXTSCPS10
R 448.98
Each
units
BMX XTS CPS - - - - - - - - - - -
RS stock no. 512-5918
Mfr. Part No.CJ1W-PA202
BrandOmron
R 3,989.34
Each
units
CJ1W CJ1M Series 85 → 264 V ac 5 V dc, 24 V dc 400 mA 14W 81.6mm 90mm 45mm 0°C +55°C 81.6 x 90 x 45 mm
RS stock no. 868-7377
Mfr. Part No.750-610
BrandWago
R 631.91
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. 148-032
Mfr. Part No.BMXCPS2010
R 6,795.32
Each
units
Modicon M340 Modicon M340 24 V dc 24V dc 2.5 A 16.8W - - - 0°C +60°C -
RS stock no. 539-0910
Mfr. Part No.FX3U-32BL
BrandMitsubishi
R 1,106.88
Each
units
FX3U MELSEC Series - - - - - - - - - -
RS stock no. 746-6117
Mfr. Part No.3RX9502-0BA00
BrandSiemens
R 4,920.00
Each
units
3RX950 AS-I Power Supply Unit 120 V ac, 230 V ac 30V dc 5 A - 125mm 70mm 125mm - - 125 x 70 x 125 mm
RS stock no. 703-7078
Mfr. Part No.MPA5500/RS
BrandMTL
R 2,878.69
Each
units
MTL5500 MPA550 85 → 265 V ac 24V dc 120 mA 1.2W 15.8mm 118.8mm 133mm -20°C +60°C 15.8 x 118.8 x 133 mm
RS stock no. 698-7326
Mfr. Part No.1746-P2
R 16,391.28
Each
units
SLC 500 - 85 to132 V ac, 170 → 265 V ac 5 V dc, 24 V dc 5 A - 74mm 140mm 145mm 0°C +60°C 74 x 140 x 145 mm