Signal Conditioners & Isolators

We offer three types of control relays from a range of brands including Phoenix Contact, ABB, Siemens and Omron.

If you're looking to control temperature, voltage, current or frequency, you'll find the products within monitoring relays. For all of your signal conditioning and conversion requirements, visit our signal conditioning range.

What is a control relay?

A control relay is basically an electrically operated switch.

How does a control relay work?

They work by opening and closing a switch to allow power to flow through a coil to conduct electricity. The coil does not actually come into contact with the switch during this process.

What types of control relays are available?

The three types of control relay are as follows:

  • Impulse relay - a type of latching relay that transfers the contacts with each pulse.
  • Monitoring relay - a protective control device for monitoring and receiving input signals, and outputting an alarm signal if a threshold is reached.
  • Signal conditioning - a device that converts one type of electronic signal into another type of signal.

What are the uses of a control relay panel?

Control relay panels are used for the control and monitoring of electrical equipment such as transformers, generators and circuit breakers in industrial systems and environments.

What is the function of an undervoltage control relay?

A relay will trip the breaker circuit if it detects an abnormality. An undervoltage (UV) relay will activate if the voltage is lower than a prescribed value, and stay like that until it reaches the necessary voltage.

Signal Conditioners
Signal Conditioners
Zener & Galvanic Barriers
Zener & Galvanic Barriers

979 Products showing for Signal Conditioners & Isolators

48 of 49
Temporarily out of stock
WAGO 857 Series Signal Conditioner, Temperature Input, Current/Voltage Output, 24V dc Supply, ATEX, IECEx
  • RS Stock No. 279-2542
  • Mfr. Part No. 857-811
Subtotal (1 unit)
SGD485.62(exc. GST)
Stocked by manufacturer
Phoenix Contact MACX MCR Series Signal Conditioner, Switch Input, Transistor Output, 30V Supply, ATEX
  • RS Stock No. 201-5768
  • Mfr. Part No. 2924278
Subtotal (1 unit)
SGD260.49(exc. GST)
In Stock
Endress+Hauser RN22 Series Signal Conditioner
  • RS Stock No. 256-6208
  • Mfr. Part No. RN42-AA1AO
Subtotal (1 unit)
SGD317.47(exc. GST)
In Stock
PR Electronics 3200 Series Signal Conditioner, Switch Input, Relay, NPN Output, 16.8V dc, 31.2 V dc Supply, IECEx/ATEX
  • RS Stock No. 270-1732
  • Mfr. Part No. 3202A1-N
Subtotal (1 unit)
SGD269.91(exc. GST)
In Stock
RS PRO Analogue Converter, Analogue Output, 24V ac/dc, 240 V ac/dc Supply
  • RS Stock No. 606-323
Subtotal (1 unit)
SGD243.77(exc. GST)
Stocked by manufacturer
Phoenix Contact PSI Series Fibre Optic Converter, 18V dc, 30 V dc Supply, ATEX
  • RS Stock No. 129-686
  • Mfr. Part No. 2708313
Subtotal (1 unit)
SGD1,245.18(exc. GST)
Stocked by manufacturer
Penko SGM800 Series Amplifier, Voltage Input, Digital Output, 18V dc, 32 V dc Supply
  • RS Stock No. 250-7638
  • Mfr. Part No. 7600A10014
Subtotal (1 unit)
SGD1,274.15(exc. GST)
In Stock
ZDAUTO AI Series Signal Conditioner, 0V dc, 3.3 V dc Supply
  • RS Stock No. 666-097
  • Mfr. Part No. AIA03020B3
Subtotal (1 bag of 25 units)
SGD330.30(exc. GST)
Temporarily out of stock
GEORGIN Intrinsic Security Power Supply, IECEx/ATEX
  • RS Stock No. 230-9451
  • Mfr. Part No. BXNTI600E
Subtotal (1 box of 1 unit)
SGD597.80(exc. GST)
In Stock
PR Electronics 2 Channel Galvanic Barrier, Analogue
  • RS Stock No. 796-6910
  • Mfr. Part No. 5104AB
Subtotal (1 unit)
SGD754.90(exc. GST)
In Stock
PR Electronics 9200 Series Signal Conditioner, Switch Input, Relay, NPN Output, 19.2V dc, 31.2 V dc Supply, IECEx/ATEX
  • RS Stock No. 270-1750
  • Mfr. Part No. 9202A1A
Subtotal (1 unit)
SGD279.35(exc. GST)
In Stock
Phoenix Contact MACX MCR Series Signal Conditioner, Voltage Input, Current/Voltage Output, 24V dc Supply
  • RS Stock No. 171-7043
  • Mfr. Part No. 2906243
Subtotal (1 unit)
SGD661.64(exc. GST)
In Stock
Phoenix Contact 1 Channel Galvanic Barrier, ATEX
  • RS Stock No. 768-1669
  • Mfr. Part No. 2811569
Subtotal (1 unit)
SGD685.48(exc. GST)
Stocked by manufacturer
Siemens 3RS7002 Series Signal Conditioner, Current Input, Current Output, 24V ac/dc Supply
  • RS Stock No. 134-8032
  • Mfr. Part No. 3RS7002-1CE00
Subtotal (1 unit)
SGD325.01(exc. GST)
Temporarily out of stock
Weidmüller ACT20X Series Signal Conditioner, Thermocouple, Current, RTD Input, Current Output, 19.2V, 31.2 V Supply,
  • RS Stock No. 902-8041
  • Mfr. Part No. 8965470000
Subtotal (1 unit)
SGD435.35(exc. GST)
Stocked by manufacturer
Phoenix Contact PSI Series Fibre Optic Converter, 24V dc Supply, ATEX
  • RS Stock No. 520-465
  • Mfr. Part No. 2708287
Subtotal (1 unit)
SGD1,389.70(exc. GST)
In Stock
P.M.A 3RS7020 Series Signal Conditioner, Digital, Signal Input, Universal Output, 18 V ac, 30 V ac, 18V dc, 31 V dc
  • RS Stock No. 736-4752
  • Mfr. Part No. SG45-115-00000-000
Subtotal (1 unit)
SGD1,163.80(exc. GST)
In Stock
Phoenix Contact MINI MCR Series Signal Conditioner, Voltage Input, Voltage Output, 30V dc, 9.6 V dc Supply, Group IIC,
  • RS Stock No. 849-6320
  • Mfr. Part No. 2902042
Subtotal (1 unit)
SGD263.59(exc. GST)
In Stock
Weidmüller ACT20P Series Signal Transducer, Current Input, Relay, Analogue Output, 31.2V Supply, DNV GL
  • RS Stock No. 287-4698
  • Mfr. Part No. 2489910000
Subtotal (1 unit)
SGD422.78(exc. GST)
Currently unavailable
Phoenix Contact MINI MCR-SL-V8-FLK 16-A Series Signal Conditioner, Voltage Input, Current Output, 20 → 30V dc
  • RS Stock No. 321-6624
  • Mfr. Part No. 2814537
Subtotal (1 unit)
SGD216.08(exc. GST)
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