Input & Output Interfaces


Input/output or I/O interface is the interaction between a central processing device, such as a PLC, and input and output devices. Inputs are the signals or data received by the processing system from a digital input device, such as a switch, relay or contactor, and analog inputs from various sensors indicating the status of physical parameters, such as temperature, pressure etc. Outputs are the signals or data sent from the processing system to digital output devices, such as an indicator, lamp, alarm, relay or contactor and analog output devices, such as motors, valves and Proportional Controllers etc.


Switch and Indicator Switches

A switch is an electrical component that can "make" or "break" an electrical circuit, interrupting the current or diverting it from one conductor to another. The mechanism of a switch removes or restores the conducting path in a circuit when it is operated. It may be operated manually, for example, a light switch or a keyboard button, may be operated by a moving object such as a door, or may be operated by some sensing element for pressure, temperature or flow.


Relays

A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a separate low-power signal, or where several circuits must be controlled by one signal.


Indicators (LED, lamps, beacon/emergency/stop lamps)

Emergency lamp, signal tower lights, indicator lights, andon lights, warning lights, industrial signal lights, tower lights, beacon and light towers are commonly used on equipment in industrial manufacturing and process control environments to provide visual indicators of a machine state or process event to machine operators, technicians, production managers and factory personnel.


Contactors

A contactor is an electrically controlled switch used for switching an electrical power circuit, similar to a relay except with higher current ratings and a few other differences. A contactor is typically controlled by a circuit which has a much lower power level than the switched circuit, such as a 24-volt coil electromagnet controlling a 220-volt motor switch.


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Contract pricing display is unavailable at the moment. Prices shown are standard retail prices, orders placed will have contract pricing applied when processed.

  Manufacturer Part No Order Code Manufacturer / Description
Availability Price For
Price
Quantity
V7-1V19E9
V7-1V19E9 - Microswitch, Miniature, Pin Plunger, SPDT, Quick Connect, 21 A

1796579

HONEYWELL

Microswitch, Miniature, Pin Plunger, SPDT, Quick Connect, 21 A

MICROSWITCH, PIN, SPDT, 277VAC, 21A; Microswitch Type:Miniature; Microswitch Actuator:Pin Plunger; Contact Configuration:SPDT; Switch Terminals:Quick Connect; Contact Current Max:21A; Contact Voltage DC Nom:-; Product Range:V7 Series; Contact Voltage AC

1,067 in stock

+ Check Stock & Lead Times

5 in stock for next day delivery (Liege stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

1,062 in stock for next day delivery (UK stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

More stock available week commencing 10/08/20

Restricted Item
RTE24005
RTE24005 - General Purpose Relay, RT2 Series, Power, Non Latching, DPDT, 5 VDC, 8 A

1703727

POTTER&BRUMFIELD - TE CONNECTIVITY

General Purpose Relay, RT2 Series, Power, Non Latching, DPDT, 5 VDC, 8 A

RELAY, DPDT, 250VAC, 5VDC, 3A; Contact Configuration:DPDT; Coil Voltage:5VDC; Contact Current:8A; Product Range:RT2 Series; Relay Mounting:Through Hole; Coil Type:Non Latching; Contact Voltage VAC:250VAC; Relay Terminals:Solder; Contact Voltage VDC:24VD

10,242 in stock

+ Check Stock & Lead Times

631 in stock for next day delivery (Liege stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

111 in stock for next day delivery (UK stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

More stock available week commencing 07/09/20

Restricted Item
RT314615
RT314615 - General Purpose Relay, Power PCB Relay RT1 Series, Power, Non Latching, SPDT, 115 VAC, 16 A

1629048

SCHRACK - TE CONNECTIVITY

General Purpose Relay, Power PCB Relay RT1 Series, Power, Non Latching, SPDT, 115 VAC, 16 A

RELAY, SPDT, 250VAC, 16A; Contact Configuration:SPDT; Coil Voltage:115VAC; Contact Current:16A; Product Range:RT1 Series; Relay Mounting:Through Hole; Coil Type:Non Latching; Contact Voltage VAC:250VAC; Relay Terminals:Solder; Contact Voltage VDC:-; Cont

20,191 in stock

+ Check Stock & Lead Times

184 in stock for next day delivery (Liege stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

8,500 in stock for next day delivery (UK stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

More stock available week commencing 05/10/20

Restricted Item
RT424024
RT424024 - Power Relay, DPDT, 24 VDC, 8 A, RT2 Series, Through Hole, Non Latching

1629054

SCHRACK - TE CONNECTIVITY

Power Relay, DPDT, 24 VDC, 8 A, RT2 Series, Through Hole, Non Latching

RELAY, DPDT, 250VAC, 8A; Contact Configuration:DPDT; Coil Voltage:24VDC; Contact Current:8A; Product Range:RT2 Series; Relay Mounting:Through Hole; Coil Type:Non Latching; Contact Voltage VAC:250VAC; Relay Terminals:Solder; Contact Voltage VDC:-; Contact

31,058 in stock

+ Check Stock & Lead Times

3,041 in stock for next day delivery (Liege stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

11,017 in stock for next day delivery (UK stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

More stock available week commencing 10/08/20

Restricted Item
SSM-001
SSM-001 - Microswitch, Snap Action, Lever, SPDT, Solder, 500 mA, 30 VDC

1735368

MULTICOMP PRO

Microswitch, Snap Action, Lever, SPDT, Solder, 500 mA, 30 VDC

MICROSWITCH, SPDT, 0.5A, PLASTIC LEVER; Microswitch Type:Snap Action; Microswitch Actuator:Lever; Contact Configuration:SPDT; Switch Terminals:Solder; Contact Current Max:500mA; Contact Voltage DC Nom:30VDC; Product Range:-; Contact Voltage AC Nom:-; Ope

19,404 in stock

+ Check Stock & Lead Times

629 in stock for next day delivery (Liege stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

8,279 in stock for next day delivery (UK stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

More stock available week commencing 19/10/20

Restricted Item
DM1-01P-30-3
DM1-01P-30-3 - Microswitch, Subminiature, Short Lever, SPDT, Solder, 1 A, 5 VDC

1735364

MULTICOMP PRO

Microswitch, Subminiature, Short Lever, SPDT, Solder, 1 A, 5 VDC

MICROSWITCH, SPDT, 1A, SHORT LEVER, 125V; Microswitch Type:Snap Action; Microswitch Actuator:Short Lever; Contact Configuration:SPDT; Switch Terminals:Solder; Contact Current Max:1A; Contact Voltage DC Nom:5VDC; Product Range:DM1 Series; Contact Voltage

1,542,918 in stock

+ Check Stock & Lead Times

34,635 in stock for next day delivery (Liege stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

512,283 in stock for next day delivery (UK stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

More stock available week commencing 26/10/20

Restricted Item
RTD14012
RTD14012 - General Purpose Relay, Power PCB Relay RT1 Series, Power, Non Latching, SPDT, 12 VDC, 16 A

1175016

TE CONNECTIVITY

General Purpose Relay, Power PCB Relay RT1 Series, Power, Non Latching, SPDT, 12 VDC, 16 A

RELAY, SPDT, 250VAC, 16A; Contact Configuration:SPDT; Coil Voltage:12VDC; Contact Current:16A; Product Range:RT1 Series; Relay Mounting:Through Hole; Coil Type:DC; Contact Voltage VAC:250VAC; Relay Terminals:Solder; Contact Voltage VDC:-; Contact Materia

12,681 in stock

+ Check Stock & Lead Times

1,360 in stock for next day delivery (Liege stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

11,321 in stock for next day delivery (UK stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

More stock available week commencing 24/08/20

Restricted Item
DM1-02P-30-3
DM1-02P-30-3 - Microswitch, Snap Action, Lever, SPDT, Solder, 1 A, 5 VDC

1735365

MULTICOMP PRO

Microswitch, Snap Action, Lever, SPDT, Solder, 1 A, 5 VDC

MICROSWITCH, SPDT, 1A, SIM LEVER; Microswitch Type:Snap Action; Microswitch Actuator:Lever; Contact Configuration:SPDT; Switch Terminals:Solder; Contact Current Max:1A; Contact Voltage DC Nom:5VDC; Product Range:DM1 Series; Contact Voltage AC Nom:125VAC;

14,645 in stock

+ Check Stock & Lead Times

2,455 in stock for next day delivery (Liege stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

2,980 in stock for next day delivery (UK stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

More stock available week commencing 26/10/20

Restricted Item
M140T01-AE0507A
M140T01-AE0507A - Microswitch, Snap Action, Long Lever, SPDT, Solder, 5 A

1735352

MULTICOMP PRO

Microswitch, Snap Action, Long Lever, SPDT, Solder, 5 A

MICROSWITCH, SPDT, 5A, LONG LEVER; Microswitch Type:Snap Action; Microswitch Actuator:Long Lever; Contact Configuration:SPDT; Switch Terminals:Solder; Contact Current Max:5A; Contact Voltage DC Nom:-; Product Range:M140T01 Series; Contact Voltage AC Nom:

3,279 in stock

+ Check Stock & Lead Times

333 in stock for next day delivery (Liege stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

1,146 in stock for next day delivery (UK stock): 00 (for re-reeled items 16:30) Mon-Fri (excluding National Holidays)

More stock available week commencing 26/10/20

Restricted Item