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

986 Products showing for Signal Conditioners & Isolators

47 of 50
In Stock
Weidmüller ACT20X Series Signal Conditioner, Switch Input, NPN Open Collector Output, 19.2V, 31.2 V Supply, IECEx
  • RS Stock No. 902-8016
  • Mfr. Part No. 8965390000
Subtotal (1 unit)
SGD325.05(exc. GST)
SGD325.05/unit
Temporarily out of stock
RS PRO Relay, Current/Voltage Input, 12V Supply
  • RS Stock No. 325-327
Subtotal (1 unit)
SGD0.70(exc. GST)
SGD0.70/unit
Temporarily out of stock
GEORGIN GH11000 Series Signal Conditioner
  • RS Stock No. 230-9467
  • Mfr. Part No. GH11020S
Subtotal (1 box of 1 unit)
SGD312.18(exc. GST)
SGD312.18/box
In Stock
Endress+Hauser Zener Barrier, Current, ATEX
  • RS Stock No. 316-258
  • Mfr. Part No. RN42-8L1AULA
Subtotal (1 unit)
SGD346.42(exc. GST)
SGD346.42/unit
Stocked by manufacturer
Endress+Hauser 2 Channel Galvanic Barrier, Zone 2
  • RS Stock No. 288-6004
  • Mfr. Part No. RN22-8L3B
Subtotal (1 unit)
SGD366.62(exc. GST)
SGD366.62/unit
Stocked by manufacturer
Phoenix Contact MACX MCR Series Signal Conditioner, Voltage Input, Resistance, Voltage Output, 30V dc Supply, ATEX,
  • RS Stock No. 201-6290
  • Mfr. Part No. 2924126
Subtotal (1 unit)
SGD320.27(exc. GST)
SGD320.27/unit
Temporarily out of stock
WAGO 857 Series Signal Conditioner
  • RS Stock No. 609-475
  • Mfr. Part No. 857-452
Subtotal (1 unit)
SGD463.96(exc. GST)
SGD463.96/unit
Temporarily out of stock
JM CONCEPT TELIS 9000 Series Universal Signal Converter, Current, Linear Resistance, RTD, Potentiometer, Thermocouple
  • RS Stock No. 232-8236
  • Mfr. Part No. TELIS9150U1
Subtotal (1 unit)
SGD512.54(exc. GST)
SGD512.54/unit
In Stock
Endress+Hauser 2 Channel Galvanic Barrier, Binary Switch Signal, EN 60947-5-6
  • RS Stock No. 256-6201
  • Mfr. Part No. RLN42-8M2BLA
Subtotal (1 unit)
SGD328.86(exc. GST)
SGD328.86/unit
In Stock
RS PRO 3RS7002 Series Signal Conditioner, Voltage Input, Voltage Output, 24V dc Supply
  • RS Stock No. 466-2236
Subtotal (1 unit)
SGD257.17(exc. GST)
SGD257.17/unit
In Stock
JM CONCEPT JK 3000 Series Isolating Signal Converter, Current/Voltage Input, Current/Voltage Output, 230 V ac, 90 V ac,
  • RS Stock No. 232-8230
  • Mfr. Part No. JK3000A2
Subtotal (1 unit)
SGD405.10(exc. GST)
SGD405.10/unit
In Stock
Siemens 3RS7020 Series Signal Conditioner, Current Input, Current Output
  • RS Stock No. 134-8057
  • Mfr. Part No. 3RS7020-2ET00
Subtotal (1 unit)
SGD414.21(exc. GST)
SGD414.21/unit
Temporarily out of stock
RS PRO Relay, Relay Output, 12V Supply
  • RS Stock No. 325-336
Subtotal (1 unit)
SGD0.87(exc. GST)
SGD0.87/unit
In Stock
Phoenix Contact FL Series Ethernet Network Isolator
  • RS Stock No. 287-7872
  • Mfr. Part No. 2902985
Subtotal (1 unit)
SGD702.45(exc. GST)
SGD702.45/unit
In Stock
Phoenix Contact MACX MCR Series Signal Conditioner, RTD, Potentiometer Input, Current Output, 24V dc Supply, IECEx, ATEX
  • RS Stock No. 191-4316
  • Mfr. Part No. 1050252
Subtotal (1 unit)
SGD500.40(exc. GST)
SGD500.40/unit
Temporarily out of stock
Endress+Hauser RN42 Series Signal Conditioner
  • RS Stock No. 256-6209
  • Mfr. Part No. RN42-AA1AU
Subtotal (1 unit)
SGD317.47(exc. GST)
SGD317.47/unit
Stocked by manufacturer
Phoenix Contact MACX MCR Series Isolation Amplifier, 30V Supply, ATEX
  • RS Stock No. 212-7324
  • Mfr. Part No. 2924294
Subtotal (1 unit)
SGD283.29(exc. GST)
SGD283.29/unit
Temporarily out of stock
WAGO 857 Series Signal Conditioner, Current Input, RS485 Output, 24V dc Supply
  • RS Stock No. 279-4267
  • Mfr. Part No. 789-620
Subtotal (1 unit)
SGD523.89(exc. GST)
SGD523.89/unit
In Stock
PR Electronics 3200 Series Signal Conditioner, Switch Input, NPN, Relay Output, 16.8V dc, 31.2 V dc Supply, IECEx/ATEX
  • RS Stock No. 270-1735
  • Mfr. Part No. 3202A2-N
Subtotal (1 unit)
SGD278.01(exc. GST)
SGD278.01/unit
Stocked by manufacturer
Endress+Hauser 2 Channel Galvanic Barrier, Zone 2
  • RS Stock No. 288-5985
  • Mfr. Part No. RLN22-AA2A
Subtotal (1 unit)
SGD194.22(exc. GST)
SGD194.22/unit
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