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

981 Products showing for Signal Conditioners & Isolators

1 of 50
Phoenix Contact MINI MCR Series Signal Conditioner, Voltage Input, 24V dc Supply
  • RS Stock No. 489-2825
  • Mfr. Part No. 2869728
Each
HK$87.00(exc. GST)
P.M.A 3RS7020 Series Signal Conditioner, Digital, Signal Input, Universal Output, 18 → 30 V ac, 18 → 31V
  • RS Stock No. 736-4752
  • Mfr. Part No. SG45-115-00000-000
Each
HK$5,571.30(exc. GST)
RS PRO Signal Conditioner, Current Input, Relay Output, 10 → 30V dc Supply
  • RS Stock No. 218-4453
Each
HK$1,969.70(exc. GST)
Phoenix Contact MACX MCR Series Signal Conditioner, Current Input, Current Output, <30.5V Supply, ATEX
  • RS Stock No. 122-9817
  • Mfr. Part No. 2905278
Each
HK$1,866.10(exc. GST)
RS PRO Signal Conditioner, Current, Voltage Input, Current, Voltage Output, 24 → 240V ac/dc Supply
  • RS Stock No. 192-3389
Each
HK$1,272.50(exc. GST)
Phoenix Contact PSI-MOS-PROFIB/FO 850 T Series Fibre Optic Converter, ATEX
  • RS Stock No. 241-6044
  • Mfr. Part No. 2708261
Each
HK$9,126.20(exc. GST)
Phoenix Contact MINI MCR Series Signal Conditioner, Current Input, Current Output, 18V Supply, ATEX
  • RS Stock No. 489-2847
  • Mfr. Part No. 2864419
Each
HK$2,317.70(exc. GST)
Eaton 1 Channel Zener Barrier, Intrinsic Safety Barrier, Analogue Output, ATEX
  • RS Stock No. 612-5335
  • Mfr. Part No. MTL7787+/RS
Each
HK$1,726.80(exc. GST)
Eaton 2 Channel Zener Barrier, Switch/Proximity Detector Interface, RTD, Thermocouple Input, ATEX
  • RS Stock No. 612-5341
  • Mfr. Part No. MTL7760AC/RS
Each
HK$1,664.70(exc. GST)
GEORGIN 1 Channel Intrinsic Security Power Supply, ATEX
  • RS Stock No. 230-9443
  • Mfr. Part No. BXNE3400EE
1 Box of 1
HK$2,208.43(exc. GST)
RS PRO Signal Conditioner, Current, Voltage Input, Current, Voltage Output, 24 → 240V ac/dc Supply
  • RS Stock No. 192-3390
Each
HK$1,972.50(exc. GST)
Siemens 3RS7003 Series Signal Conditioner, Current Input, Current Output, 24V ac/dc Supply
  • RS Stock No. 134-8042
  • Mfr. Part No. 3RS7003-2CE00
Each
HK$2,664.30(exc. GST)
Pepperl + Fuchs S1SD Series Signal Conditioner, Current, Voltage Input, Current, Voltage Output, 16.8 → 31.2V dc
  • RS Stock No. 134-8132
  • Mfr. Part No. S1SD-1AI-1U.2
Each
HK$1,929.50(exc. GST)
Phoenix Contact MACX MCR Series Signal Conditioner, RTD, Potentiometer Input, Current Output, 24V dc Supply, ATEX
  • RS Stock No. 189-2305
  • Mfr. Part No. 1050222
Each
HK$2,365.60(exc. GST)
RS PRO Signal Conditioner, RTD, Thermocouple Input, Current, Voltage Output, 10 → 32 V ac, 10 → 48V dc
  • RS Stock No. 788-6999
Each
HK$1,537.10(exc. GST)
PR Electronics 2 Channel Galvanic Barrier, Hart Transparent Repeater, ATEX, IECEx
  • RS Stock No. 136-8692
  • Mfr. Part No. 5106BBB
Each
HK$4,750.60(exc. GST)
Siemens 3RS7005 Series Signal Conditioner, Current, Voltage Input, Current, Voltage Output, 24 → 240V ac/dc
  • RS Stock No. 134-8049
  • Mfr. Part No. 3RS7005-2FW00
Each
HK$4,454.70(exc. GST)
Phoenix Contact MINI MCR Series Current Measuring Transducer, Current Input, Current Output, 24V dc Supply
  • RS Stock No. 715-7982
  • Mfr. Part No. 2810638
Each
HK$2,561.20(exc. GST)
Siemens 3RS7025 Series Signal Conditioner, Current, Voltage Input, Current, Voltage Output, 24 → 240V ac/dc
  • RS Stock No. 134-8059
  • Mfr. Part No. 3RS7025-1FW00
Each
HK$5,738.00(exc. GST)
Siemens 3RS7005 Series Signal Conditioner, Current, Voltage Input, Current, Voltage Output, 24V ac/dc Supply
  • RS Stock No. 134-8048
  • Mfr. Part No. 3RS7005-2FE00
Each
HK$3,241.70(exc. GST)
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