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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  Manufacturer Part No Newark Part No. Manufacturer / Description
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Price
Quantity
G4ODC5
G4ODC5 - Digital Output Module, DC Output 5–60 Vdc, 5 Vdc Logic

96F1045

Digital Output Module, DC Output 5–60 Vdc, 5 Vdc Logic

OPTO 22

DC OUTPUT MODULE; Current Rating:2A; Product Range:-; Accessory Type:Digital DC Output Module; External Depth:41.1mm; External Width:12.2mm; Length:48.8mm; No. of Digital Outputs:1; No. of Outputs:1; Output Current:3A

2,100 in stock

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More stock available week commencing 19/10/20

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T92S11D22-24
T92S11D22-24 - Power Relay, DPDT, 24 VDC, 40 A, T92 Series, Panel, Non Latching

17M3095

Power Relay, DPDT, 24 VDC, 40 A, T92 Series, Panel, Non Latching

POTTER&BRUMFIELD - TE CONNECTIVITY

RELAY, DPDT, 277VAC, 28VDC, 40A; Contact Configuration:DPDT; Coil Voltage:24VDC; Contact Current:40A; Product Range:T92 Series; Relay Mounting:Panel; Coil Type:Non Latching; Contact Voltage VAC:277VAC; Relay Terminals:Quick Connect RoHS Compliant: Yes

900 in stock

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  • 2,640 more will be available on 09/11/20
  • More stock available week commencing 08/02/21

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    ODC5
    ODC5 - Output Module, DC Output 5–60 VDC, 5 VDC Logic

    18M9274

    Output Module, DC Output 5–60 VDC, 5 VDC Logic

    OPTO 22

    I/O MODULE, DC Output, 5-60 VDC, 3A, 5VDC Logic; Current Rating:3A; Product Range:-; Accessory Type:DC Output Module; External Depth:15.2mm; External Width:43.2mm; For Use With:Opto22 SNAP PAC Systems; Length:31.8mm RoHS Compliant: Yes

    276 in stock

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    T9AS1D22-12
    T9AS1D22-12 - Power Relay, SPST-NO, 12 VDC, 30 A, T9A Series, Through Hole, Non Latching

    92F3733

    Power Relay, SPST-NO, 12 VDC, 30 A, T9A Series, Through Hole, Non Latching

    POTTER&BRUMFIELD - TE CONNECTIVITY

    RELAY, SPST-NO, 240VAC, 28VDC, 30A; Contact Configuration:SPST-NO; Coil Voltage:12VDC; Contact Current:30A; Product Range:T9A Series; Relay Mounting:Through Hole; Coil Type:Non Latching; Contact Voltage VAC:240VAC; Carry Current:30A RoHS Compliant: Yes

    3,307 in stock

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    G4OAC5A
    G4OAC5A - AC Output Module 24–280 Vac, 5 Vdc Logic

    96F6457

    AC Output Module 24–280 Vac, 5 Vdc Logic

    OPTO 22

    I/O MODULE; Current Rating:3A; Product Range:-; Contact Configuration:SPST-NO; Count Input Frequency:65Hz; No. of Analog Outputs:1; No. of Outputs:1; Output Current:3A; Signal Input Type:4 to 8VDC; Supply Voltage Max:8VDC RoHS Compliant: Yes

    320 in stock

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    T92S7D22-24
    T92S7D22-24 - Power Relay, DPST-NO, 24 VDC, 40 A, T92 Series, Panel, Non Latching

    17M3101

    Power Relay, DPST-NO, 24 VDC, 40 A, T92 Series, Panel, Non Latching

    POTTER&BRUMFIELD - TE CONNECTIVITY

    RELAY, DPST-NO, 277VAC, 28VDC, 40A; Contact Configuration:DPST-NO; Coil Voltage:24VDC; Contact Current:40A; Product Range:T92 Series; Relay Mounting:Panel; Coil Type:Non Latching; Contact Voltage VAC:277VAC; Contact Voltage VDC:28VDCRoHS Compliant: Yes

    1,512 in stock

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    G4IDC5
    G4IDC5 - Digital Input Module, DC Input 10–32 Vdc, 5 Vdc Logic

    96F1066

    Digital Input Module, DC Input 10–32 Vdc, 5 Vdc Logic

    OPTO 22

    I/O MODULE, INPUT 10V TO 32V; Current Rating:25mA; Product Range:-; Accessory Type:Module; External Depth:41.1mm; External Width:12.2mm; For Use With:DC Input Modules; Length:48.8mm; No. of Digital Inputs:1; No. of Outputs:1 RoHS Compliant: Yes

    481 in stock

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    JW2SN-DC12V
    JW2SN-DC12V - General Purpose Relay, JW Series, Power, Non Latching, DPDT, 12 VDC, 5 A

    51F3944

    General Purpose Relay, JW Series, Power, Non Latching, DPDT, 12 VDC, 5 A

    PANASONIC

    RELAY, DPDT, 277VAC, 30VDC, 5A; Contact Configuration:DPDT; Coil Voltage:12VDC; Contact Current:5A; Product Range:JW Series; Relay Mounting:Through Hole; Coil Type:Non Latching; Contact Voltage VAC:277VAC; Relay Terminals:Solder RoHS Compliant: Yes

    4,263 in stock

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    RT314024
    RT314024 - General Purpose Relay, Power PCB Relay RT1 Series, Power, Non Latching, SPDT

    36K2037

    General Purpose Relay, Power PCB Relay RT1 Series, Power, Non Latching, SPDT

    SCHRACK - TE CONNECTIVITY

    RELAY, SPDT, 250VAC, 16A; Contact Configuration:SPDT; Coil Voltage:24VDC; Contact Current:16A; Product Range:Power PCB Relay RT1 Series; Relay Mounting:Through Hole; Coil Type:Non Latching; Contact Voltage VAC:250VAC RoHS Compliant: Yes

    3,420 in stock

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    59-111
    59-111 - Pushbutton Switch, Momentary, SPST-NO-DB, 125 V, 50 V, 400 mA, Solder Lug

    50F1487

    Pushbutton Switch, Momentary, SPST-NO-DB, 125 V, 50 V, 400 mA, Solder Lug

    ITW SWITCHES

    SWITCH, PUSHBUTTON, SPST-NO, 400mA, 125V; Switch Operation:On-(On); Contact Configuration:SPST-NO; Contact Voltage AC Nom:125V; Contact Voltage DC Nom:50V; Contact Current Max:400mA; Switch Terminals:Solder; Product Range:59 Series RoHS Compliant: Yes

    487 in stock

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  • 1,000 more will be available on 01/12/20
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  • More stock available week commencing 15/02/21

    Restricted Item
    PCN-124D3MHZ
    PCN-124D3MHZ - Power Relay, SPST-NO, 24 VDC, 3 A, PCN Series, Through Hole, Non Latching

    20M7034

    Power Relay, SPST-NO, 24 VDC, 3 A, PCN Series, Through Hole, Non Latching

    OEG - TE CONNECTIVITY

    RELAY, SPST-NO, 250VAC, 30VDC, 3A; Contact Configuration:SPST-NO; Coil Voltage:24VDC; Contact Current:3A; Product Range:PCN Series; Relay Mounting:Through Hole; Coil Type:Non Latching; Contact Voltage VAC:250VAC; Carry Current:3A RoHS Compliant: Yes

    18,391 in stock

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    18,391 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 25/01/21

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    RT424024
    RT424024 - General Purpose Relay, RT2 bistable Series, Power, Non Latching, DPDT, 24 VDC

    16F393

    General Purpose Relay, RT2 bistable Series, Power, Non Latching, DPDT, 24 VDC

    SCHRACK - TE CONNECTIVITY

    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 RoHS Compliant: Yes

    13,167 in stock

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    13,167 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 04/01/21

    Restricted Item
    T9AP1D52-24
    T9AP1D52-24 - Power Relay, SPST-NO, 24 VDC, 30 A, T9A Series, Panel, Non Latching

    17M3059

    Power Relay, SPST-NO, 24 VDC, 30 A, T9A Series, Panel, Non Latching

    POTTER&BRUMFIELD - TE CONNECTIVITY

    RELAY, SPST-NO, 240VAC, 28VDC, 30A; Contact Configuration:SPST-NO; Coil Voltage:24VDC; Contact Current:30A; Product Range:T9A Series; Relay Mounting:Panel; Coil Type:Non Latching; Contact Voltage VAC:240VAC; Contact Voltage VDC:28VDCRoHS Compliant: Yes

    1,656 in stock

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    1,656 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 11/01/21

    Restricted Item
    T77S1D10-12
    T77S1D10-12 - Power Relay, SPST-NO, 12 VDC, 10 A, T77 Series, Through Hole, Non Latching

    17M3054

    Power Relay, SPST-NO, 12 VDC, 10 A, T77 Series, Through Hole, Non Latching

    POTTER&BRUMFIELD - TE CONNECTIVITY

    RELAY, SPST-NO, 250VAC, 30VDC, 10A; Contact Configuration:SPST-NO; Coil Voltage:12VDC; Contact Current:10A; Product Range:T77 Series; Relay Mounting:Through Hole; Coil Type:Non Latching; Contact Voltage VAC:250VAC; Resistance:320ohm RoHS Compliant: Yes

    886 in stock

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    886 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 25/01/21

    Restricted Item
    RT424012F
    RT424012F - General Purpose Relay, RT2 bistable Series, Power, Non Latching, DPDT, 12 VDC

    94B9819

    General Purpose Relay, RT2 bistable Series, Power, Non Latching, DPDT, 12 VDC

    POTTER&BRUMFIELD - TE CONNECTIVITY

    RELAY, DPDT, 250VAC, 8A; Contact Configuration:DPDT; Coil Voltage:12VDC; Contact Current:8A; Product Range:RT2 Series; Relay Mounting:Through Hole; Coil Type:Non Latching; Contact Voltage VAC:250VAC; Relay Terminals:Solder RoHS Compliant: Yes

    15,378 in stock

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    15,378 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 01/02/21

    Restricted Item
    PCJ-112D3MH,301
    PCJ-112D3MH,301 - Power Relay, SPST-NO, 12 VDC, 3 A, PCJ Series, Through Hole, Non Latching

    56K8048

    Power Relay, SPST-NO, 12 VDC, 3 A, PCJ Series, Through Hole, Non Latching

    OEG - TE CONNECTIVITY

    RELAY, SPST-NO, 240VAC, 30VDC, 3A; Contact Configuration:SPST-NO; Coil Voltage:12VDC; Contact Current:3A; Product Range:PCJ Series; Relay Mounting:Through Hole; Coil Type:Non Latching; Contact Voltage VAC:240VAC; External Height:15mmRoHS Compliant: Yes

    441 in stock

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    441 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 25/01/21

    Restricted Item
    RTB14024F
    RTB14024F - General Purpose Relay, Power PCB Relay RT1 Series, Power, Non Latching, SPDT

    36K2034

    General Purpose Relay, Power PCB Relay RT1 Series, Power, Non Latching, SPDT

    POTTER&BRUMFIELD - TE CONNECTIVITY

    RELAY, SPDT, 250VAC, 12A; Contact Configuration:SPDT; Coil Voltage:24VDC; Contact Current:12A; Product Range:RT1 Series; Relay Mounting:Through Hole; Coil Type:Non Latching; Contact Voltage VAC:250VAC; Relay Terminals:Solder RoHS Compliant: Yes

    1,055 in stock

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    1,055 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 01/02/21

    Restricted Item
    PCN-112D3MHZ
    PCN-112D3MHZ - Power Relay, SPST-NO, 12 VDC, 3 A, PCN Series, Through Hole, Non Latching

    20M7033

    Power Relay, SPST-NO, 12 VDC, 3 A, PCN Series, Through Hole, Non Latching

    OEG - TE CONNECTIVITY

    RELAY, SPST-NO, 250VAC, 30VDC, 3A; Contact Configuration:SPST-NO; Coil Voltage:12VDC; Contact Current:3A; Product Range:PCN Series; Relay Mounting:Through Hole; Coil Type:Non Latching; Contact Voltage VAC:250VAC; Carry Current:3A RoHS Compliant: Yes

    3,143 in stock

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    3,143 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    More stock available week commencing 25/01/21

    Restricted Item
    5-1415535-5
    5-1415535-5 - Power Relay, SPDT, 24 VDC, 5 A, PE Series, Through Hole, Non Latching

    99X4358

    Power Relay, SPDT, 24 VDC, 5 A, PE Series, Through Hole, Non Latching

    TE CONNECTIVITY

    POWER RELAY, SPDT, 5A, 250VAC, TH; Contact Configuration:SPDT; Coil Voltage:24VDC; Contact Current:5A; Product Range:PE Series; Relay Mounting:Through Hole; Coil Type:Non Latching; Contact Voltage VAC:250V; Relay Terminals:Solder RoHS Compliant: Yes

    4,909 in stock

    + Check Stock & Lead Times

    4,909 in stock for same day shipping: Order before 5:45 pm EST (Mon – Fri. Excluding National Holidays)

    Available in quantity shown

    Restricted Item
    KUP-14D15-24
    KUP-14D15-24 - Power Relay, 3PDT, 24 VDC, 10 A, KUP Series, Socket, Non Latching

    17M0267

    Power Relay, 3PDT, 24 VDC, 10 A, KUP Series, Socket, Non Latching

    POTTER&BRUMFIELD - TE CONNECTIVITY

    RELAY, 3PDT, 240VAC, 32VDC, 10A; Contact Configuration:3PDT; Coil Voltage:24VDC; Contact Current:10A; Product Range:KUP Series; Relay Mounting:Socket; Coil Type:Non Latching; Contact Voltage VAC:240VAC; Relay Terminals:Quick Connect RoHS Compliant: Yes

    Available for back order

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  • 422 more will be available on 24/11/20
  • More stock available week commencing 11/01/21 Contact me when back in stock

    Restricted Item
    11-504
    11-504 - Microswitch, Miniature, Pin Plunger, SPDT, Quick Connect, 10 A, 28 VDC

    61F1830

    Microswitch, Miniature, Pin Plunger, SPDT, Quick Connect, 10 A, 28 VDC

    ITW SWITCHES

    MICROSWITCH, PIN PLUNGER, SPDT 10A 250V; Microswitch Type:Miniature; Microswitch Actuator:Pin Plunger; Contact Configuration:SPDT; Switch Terminals:Quick Connect; Contact Current Max:10A; Contact Voltage DC Nom:28VDC RoHS Compliant: Yes

    Available for back order

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  • More stock available week commencing 18/01/21 Contact me when back in stock

    Restricted Item
    KB15CKW01-6G-JB
    KB15CKW01-6G-JB - SWITCH, SPDT, ROUND, MOM, BLUE ILLUM

    74M2490

    SWITCH, SPDT, ROUND, MOM, BLUE ILLUM

    NKK SWITCHES

    SWITCH, SPDT, ROUND, MOM, BLUE ILLUM; Switch Operation:On-(On); Illumination Colour:Blue; Product Range:KB Series; Pushbutton Actuator Style:Round; Contact Configuration:SPDT; Switch Terminals:Solder Lug; Contact Current Max:1A; RoHS Compliant: Yes

    No Longer Available

    Restricted Item
    KB26CKW01-6G-JB
    KB26CKW01-6G-JB - SWITCH, DPDT, ROUND, LATCHING, BLUE

    74M2503

    SWITCH, DPDT, ROUND, LATCHING, BLUE

    NKK SWITCHES

    SWITCH, DPDT, ROUND, LATCHING, BLUE; Switch Operation:On-On; Illumination Colour:Blue; Product Range:KB Series; Pushbutton Actuator Style:Round; Contact Configuration:DPDT; Switch Terminals:Solder Lug; Contact Current Max:1A; ContactRoHS Compliant: Yes

    No Longer Available

    Restricted Item