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

969 Products showing for Signal Conditioners & Isolators

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1 of 49
In Stock
Eaton Zener Barrier, ATEX
  • RS Stock No. 703-7056
  • Mfr. Part No. MTL5541/RS
Subtotal (1 unit)
HK$4,370.50
HK$4,370.50/unit
In Stock
Weidmüller ACT20X Series Signal Conditioner, Current/Voltage Input, Current/Voltage Output, 24V dc Supply
  • RS Stock No. 508-4126
  • Mfr. Part No. 8594810000
Subtotal (1 unit)
HK$1,455.60
HK$1,455.60/unit
In Stock
PR Electronics 9200 Series Solenoid Driver, PNP Input, Relay Output, 19.2V dc, 31.2 V dc Supply, ATEX
  • RS Stock No. 796-7064
  • Mfr. Part No. 9203B1B
Subtotal (1 unit)
HK$2,812.10
HK$2,812.10/unit
In Stock
Motrona IO Series Signal Converter, Current/Voltage Input, PNP Open Collector Output, 18V dc, 30 V dc Supply
  • RS Stock No. 309-392
  • Mfr. Part No. IO222/CO
Subtotal (1 unit)
HK$3,398.80
HK$3,398.80/unit
In Stock
PR Electronics 3100 Series Isolating Signal Converter, Current Input, Current Output, 16.8V dc, 31.2 V dc Supply, ATEX
  • RS Stock No. 796-7082
  • Mfr. Part No. 3108
Subtotal (1 unit)
HK$2,058.70
HK$2,058.70/unit
Stocked by manufacturer
Siemens 3RS7002 Series Signal Conditioner, Current Input, Current Output, 24V ac/dc Supply
  • RS Stock No. 134-8036
  • Mfr. Part No. 3RS7002-2DE00
Subtotal (1 unit)
HK$3,535.40
HK$3,535.40/unit
Stocked by manufacturer
Siemens 3RS7006 Series Signal Conditioner, Current/Voltage Input, Current/Voltage Output, 24V ac/dc, 240 V ac/dc Supply
  • RS Stock No. 134-8053
  • Mfr. Part No. 3RS7006-1FW00
Subtotal (1 unit)
HK$7,164.90
HK$7,164.90/unit
In Stock
Siemens 3RS7005 Series Signal Conditioner, Current/Voltage Input, Current/Voltage Output, 24V ac/dc, 240 V ac/dc Supply
  • RS Stock No. 134-8045
  • Mfr. Part No. 3RS7005-1FW00
Subtotal (1 unit)
HK$4,754.40
HK$4,754.40/unit
In Stock
RS PRO BM Series Signal Conditioner, Current Input, Current Output, 30V dc, 9 V dc Supply
  • RS Stock No. 466-2264
Subtotal (1 unit)
HK$2,129.20
HK$2,129.20/unit
Stocked by manufacturer
Phoenix Contact MINI MCR Series Signal Conditioner, Voltage Input, Current Output, 30V dc, 9.6 V dc Supply, CCC, UL,
  • RS Stock No. 849-6389
  • Mfr. Part No. 2902030
Subtotal (1 unit)
HK$1,545.90
HK$1,545.90/unit
Stocked by manufacturer
Phoenix Contact MACX MCR-EX-SL-SD-21-25-LFD-SP Series Signal Conditioner, Transistor Output, 30V Supply, ATEX
  • RS Stock No. 207-3315
  • Mfr. Part No. 2905674
Subtotal (1 unit)
HK$2,607.10
HK$2,607.10/unit
Stocked by manufacturer
Siemens 3RS7006 Series Signal Conditioner, Current/Voltage Input, Current/Voltage Output, 24V ac/dc, 240 V ac/dc Supply
  • RS Stock No. 134-8055
  • Mfr. Part No. 3RS7006-2FW00
Subtotal (1 unit)
HK$7,164.90
HK$7,164.90/unit
In Stock
Phoenix Contact MINI MCR Series Signal Conditioner, Current/Voltage Input, Current/Voltage Output, 24V dc Supply, ATEX
  • RS Stock No. 489-2904
  • Mfr. Part No. 2864150
Subtotal (1 unit)
HK$3,265.30
HK$3,265.30/unit
In Stock
PR Electronics 5100 Series Galvanic Barrier, Current, Voltage, RTD, Thermocouple Input, Voltage, Relay, Current Output,
  • RS Stock No. 796-6994
  • Mfr. Part No. 5116B
Subtotal (1 unit)
HK$6,423.00
HK$6,423.00/unit
In Stock
Phoenix Contact Galvanic Barrier, Analogue, ATEX
  • RS Stock No. 751-1314
  • Mfr. Part No. 2865793
Subtotal (1 unit)
HK$3,294.40
HK$3,294.40/unit
In Stock
Phoenix Contact MINI MCR Series Configurable Transducer, Resistance Input, Current/Voltage Output, 30V dc, 9.6 V dc
  • RS Stock No. 849-6349
  • Mfr. Part No. 2902016
Subtotal (1 unit)
HK$2,051.10
HK$2,051.10/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)
HK$3,458.00
HK$3,458.00/unit
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)
HK$3,430.90
HK$3,430.90/unit
Stocked by manufacturer
Siemens 3RS7002 Series Signal Conditioner, Current Input, Current Output, 24V ac/dc Supply
  • RS Stock No. 134-8033
  • Mfr. Part No. 3RS7002-1DE00
Subtotal (1 unit)
HK$3,535.40
HK$3,535.40/unit
Temporarily out of stock
Weidmüller ACT20P Series Signal Converter, Current Input, Current Output, 30V Supply, IECEx, ATEX
  • RS Stock No. 287-5324
  • Mfr. Part No. 7760054119
Subtotal (1 unit)
HK$1,708.90
HK$1,708.90/unit
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