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      AlibabaElectrical Equipment & SuppliesIndustrial ControlsRelaysWholesale do relays do

      Do Relays Do

      (6250 products available)

      Plug in relay SIS controller DI DO signal inputs module safety relay

      Plug in relay SIS controller DI DO signal inputs module safety relay

      $95.00 - $102.00
      Min Order: 5 pieces
      CN
      5 yrsverify
      5.0
      /5
      ·
      1 reviews
      ·
      "good service"
      Contact Supplier
      TUV SIL 3 safety relay DO Signal SIS 24V DC_ 1NO_ 2A CHENZHU CZSR8401-1A

      TUV SIL 3 safety relay DO Signal SIS 24V DC_ 1NO_ 2A CHENZHU CZSR8401-1A

      $89.00 - $119.00
      Min Order: 1 unit
      CN
      8 yrs
      0.0
      /5
      ·
      0 reviews
      ·
      "Fast delivery"
      Contact Supplier
      Safety Relay, Relay Module, Electrical Relay CZSR8401-1A DO Signal (SIS) | 24V DC | 1N/O | 5A

      Safety Relay, Relay Module, Electrical Relay CZSR8401-1A DO Signal (SIS) | 24V DC | 1N/O | 5A

      Ready to Ship
      $99.00 - $119.00
      Min Order: 1 set
      Shipping per piece: $6.72
      CN
      1 yrs
      0.0
      /5
      ·
      0 reviews
      ·
      Contact Supplier
      PILOT PMAC811 Low voltage Intelligent AC Motor Protection Controller relay with CT

      PILOT PMAC811 Low voltage Intelligent AC Motor Protection Controller relay with CT

      $0.01
      Min Order: 1 set
      CN
      18 yrsverify
      5.0
      /5
      ·
      4 reviews
      ·
      "Good customer service"
      Contact Supplier
      AM5 medium-voltage protection relay with overcurrent IDMT earth fault overload RS485

      AM5 medium-voltage protection relay with overcurrent IDMT earth fault overload RS485

      $777.00
      Min Order: 2 acres
      CN
      3 yrs
      5.0
      /5
      ·
      3 reviews
      ·
      Contact Supplier
      AM5 medium-voltage protection relay with overcurrent IDMT earth fault overload RS485

      AM5 medium-voltage protection relay with overcurrent IDMT earth fault overload RS485

      Ready to Ship
      $777.00
      Min Order: 2 pieces
      Shipping per piece: $10.00
      CN
      6 yrsverify
      4.5
      /5
      ·
      3 reviews
      ·
      "good service"
      Contact Supplier
      Acrel AM5SE Series Overload Under Voltage Frequency Thermal Overcurrent Earth Fault External Protection Relay

      Acrel AM5SE Series Overload Under Voltage Frequency Thermal Overcurrent Earth Fault External Protection Relay

      Ready to Ship
      $736.70
      Min Order: 5 pieces
      Shipping per piece: $20.40
      CN
      6 yrsverify
      5.0
      /5
      ·
      15 reviews
      ·
      "good order"
      Contact Supplier
      Acrel AM5 Middle Voltage Motor Protection Relay 8 current input 4 voltage input 16 DI 10 DO Powerful graphic programmable Logic

      Acrel AM5 Middle Voltage Motor Protection Relay 8 current input 4 voltage input 16 DI 10 DO Powerful graphic programmable Logic

      Ready to Ship
      $1,071.43
      Min Order: 1 acre
      Shipping per piece: $45.95
      CN
      4 yrsverify
      4.8
      /5
      ·
      10 reviews
      ·
      "fast service"
      Contact Supplier
      General Purpose Relay Original MK3P-DO DC100

      General Purpose Relay Original MK3P-DO DC100

      $3.00 - $13.00
      Min Order: 5 pieces
      CN
      9 yrs
      4.8
      /5
      ·
      10 reviews
      ·
      "good service"
      Contact Supplier
      HIDROJET auto parts black relay 24v 80a 4 pin JD2912 waterproof car relay RTT7106 for sale

      HIDROJET auto parts black relay 24v 80a 4 pin JD2912 waterproof car relay RTT7106 for sale

      $1.50 - $2.00
      Min Order: 10 pieces
      CN
      14 yrsverify
      4.8
      /5
      ·
      58 reviews
      ·
      "amazing delivery"
      Contact Supplier
      Huaqingjun Original 8-Channel RS485 Communication Relay Module Remote Control Modbus RTU DO Module for Equipment

      Huaqingjun Original 8-Channel RS485 Communication Relay Module Remote Control Modbus RTU DO Module for Equipment

      Ready to Ship
      $33.00 - $35.00
      Min Order: 5 pieces
      Shipping per piece: $4.06
      CN
      6 yrs
      5.0
      /5
      ·
      3 reviews
      ·
      "fast delivery"
      Contact Supplier
      N438C15 DC 12V DC 24V 15 Channel RS485 RS232 Modbus RTU Relay Board PLC DO PC UART Serial Port Switch Controller Relay Module

      N438C15 DC 12V DC 24V 15 Channel RS485 RS232 Modbus RTU Relay Board PLC DO PC UART Serial Port Switch Controller Relay Module

      $26.10 - $26.70
      Min Order: 1 piece
      CN
      1 yrs
      4.8
      /5
      ·
      47 reviews
      ·
      "excellent service"
      Contact Supplier
      Rele de alta tensao do estado solid da fase da concha plastic para a protect do circuit reles

      Rele de alta tensao do estado solid da fase da concha plastic para a protect do circuit reles

      $4.00 - $7.00
      Min Order: 5 pieces
      CN
      5 yrs
      5.0
      /5
      ·
      2 reviews
      ·
      "Good service"
      Contact Supplier
      Acrel ARD2M Three Phase Intelligent Motor Protector Controller wtih rs485 Overload Underload Protection DO Output to contactor

      Acrel ARD2M Three Phase Intelligent Motor Protector Controller wtih rs485 Overload Underload Protection DO Output to contactor

      Ready to Ship
      $162.00
      Min Order: 1 piece
      Shipping per piece: $30.42
      CN
      5 yrs
      4.8
      /5
      ·
      8 reviews
      ·
      "star service"
      Contact Supplier
      PS640UX Series PSM642UX Motor Protection relay Smart Motor Protector for Remote Monitoring of Motor 14DI 6DO

      PS640UX Series PSM642UX Motor Protection relay Smart Motor Protector for Remote Monitoring of Motor 14DI 6DO

      $768.00 - $772.00
      Min Order: 1 set
      CN
      1 yrs
      0.0
      /5
      ·
      0 reviews
      ·
      Contact Supplier
      10IOA01 DC 24V 1-12 Channel DI-DO PLC IO Modbus RTU RS485 Relay Switch Expanding for Smart Home Motor PTZ Security Monitor

      10IOA01 DC 24V 1-12 Channel DI-DO PLC IO Modbus RTU RS485 Relay Switch Expanding for Smart Home Motor PTZ Security Monitor

      $4.80 - $20.30
      Min Order: 5 pieces
      CN
      1 yrs
      4.7
      /5
      ·
      13 reviews
      ·
      "fast delivery"
      Contact Supplier
      1-4 Channel DI-DO PLC IO Expanding Module Modbus RTU RS485 Relay Switch Board DC 24V for Smart Home Motor PTZ Security Monitor

      1-4 Channel DI-DO PLC IO Expanding Module Modbus RTU RS485 Relay Switch Board DC 24V for Smart Home Motor PTZ Security Monitor

      $5.00 - $15.00
      Min Order: 20 pieces
      CN
      3 yrs
      4.8
      /5
      ·
      26 reviews
      ·
      "Good service"
      Contact Supplier
      CAT1 RTU Modbus Relay Module Support JSON MQTT with RS485 DO DI AI Port ZHC493C IOTRouter

      CAT1 RTU Modbus Relay Module Support JSON MQTT with RS485 DO DI AI Port ZHC493C IOTRouter

      $55.00 - $59.00
      Min Order: 1 piece
      CN
      5 yrs
      4.6
      /5
      ·
      13 reviews
      ·
      "Received on time"
      Contact Supplier
      2 in 1 15ch RS485 RS232 Modbus RTU Relay PLC DO PC UART Serial Port Switch Controller DC 12V 24V

      2 in 1 15ch RS485 RS232 Modbus RTU Relay PLC DO PC UART Serial Port Switch Controller DC 12V 24V

      $27.00
      Min Order: 2 pieces
      CN
      5 yrs
      4.8
      /5
      ·
      288 reviews
      ·
      "good service"
      Contact Supplier
      UM-IC50/32R/CO/DO/F/CS1458 Original Relay Module Ready Stock

      UM-IC50/32R/CO/DO/F/CS1458 Original Relay Module Ready Stock

      $483.11 - $533.96
      Min Order: 10 pieces
      CN
      1 yrs
      0.0
      /5
      ·
      0 reviews
      ·
      Contact Supplier
      N438C15 DC 24V 15 Channel RS485 RS232 Modbus RTU Relay Board PLC DO PC UART Serial Port Switch Controller Relay Module

      N438C15 DC 24V 15 Channel RS485 RS232 Modbus RTU Relay Board PLC DO PC UART Serial Port Switch Controller Relay Module

      $22.61 - $28.26
      Min Order: 5 pieces
      CN
      1 yrs
      0.0
      /5
      ·
      0 reviews
      ·
      Contact Supplier
      440R-C23136 toggle switch 440R-C23136 B converter MSR131RTP Safety Relay switch toggle 440RC23136

      440R-C23136 toggle switch 440R-C23136 B converter MSR131RTP Safety Relay switch toggle 440RC23136

      $354.99 - $472.99
      Min Order: 5 pieces
      CN
      2 yrsverify
      5.0
      /5
      ·
      6 reviews
      ·
      "Quick service"
      Contact Supplier
      SIS controller DI DO signals input safety relay module Seperate one channels Internal Excontact protection safety relay

      SIS controller DI DO signals input safety relay module Seperate one channels Internal Excontact protection safety relay

      $95.00 - $102.00
      Min Order: 5 pieces
      CN
      5 yrsverify
      5.0
      /5
      ·
      1 reviews
      ·
      "good service"
      Contact Supplier
      TUV SIL 3 safety relay DO Signal SIS 24V DC_ 1N/O+1N/C 5A CHENZHU CZSR8403-1AR1B

      TUV SIL 3 safety relay DO Signal SIS 24V DC_ 1N/O+1N/C 5A CHENZHU CZSR8403-1AR1B

      $165.00 - $180.00
      Min Order: 5 units
      CN
      8 yrs
      0.0
      /5
      ·
      0 reviews
      ·
      "Fast delivery"
      Contact Supplier
      CZSR8001-2A2B DO Signal (SIS) input | 24V DC | 2NO+2NC | 5A Safety Relay, Relay Module, Electrical Relay

      CZSR8001-2A2B DO Signal (SIS) input | 24V DC | 2NO+2NC | 5A Safety Relay, Relay Module, Electrical Relay

      Ready to Ship
      $159.00 - $199.00
      Min Order: 1 set
      Shipping per piece: $7.08
      CN
      1 yrs
      0.0
      /5
      ·
      0 reviews
      ·
      Contact Supplier
      General Purpose Relay Original MK2P-DO DC24

      General Purpose Relay Original MK2P-DO DC24

      $3.00 - $13.00
      Min Order: 5 pieces
      CN
      9 yrs
      4.8
      /5
      ·
      10 reviews
      ·
      "good service"
      Contact Supplier
      Acrel AM5SE Series Curren Voltage Frequency Thermal Overload Residual Earth Fault External Protection Relay

      Acrel AM5SE Series Curren Voltage Frequency Thermal Overload Residual Earth Fault External Protection Relay

      $736.00
      Min Order: 5 pieces
      CN
      6 yrsverify
      5.0
      /5
      ·
      15 reviews
      ·
      "good order"
      Contact Supplier
      Huaqingjun 64-Channel RS485 LAN Ethernet RJ45 Relay Module Modbus RTU DO Module for ETC Induction

      Huaqingjun 64-Channel RS485 LAN Ethernet RJ45 Relay Module Modbus RTU DO Module for ETC Induction

      Ready to Ship
      $215.00 - $217.00
      Min Order: 5 pieces
      Shipping per piece: $7.92
      CN
      6 yrs
      5.0
      /5
      ·
      3 reviews
      ·
      "fast delivery"
      Contact Supplier
      DC 12V/24V 4-16CH DI-DO CAN Fieldbus Relay Module RS485 Modbus RTU PLC IO Expanding Board NPN/PNP Digital Input CAN Controller

      DC 12V/24V 4-16CH DI-DO CAN Fieldbus Relay Module RS485 Modbus RTU PLC IO Expanding Board NPN/PNP Digital Input CAN Controller

      $12.70 - $31.30
      Min Order: 5 pieces
      CN
      1 yrs
      4.8
      /5
      ·
      47 reviews
      ·
      "excellent service"
      Contact Supplier
      12-DI 12-DO DC 12V 24V RS485 IO Board Optically Isolated NPN Input & 12 Relay Output Modbus RTU Module

      12-DI 12-DO DC 12V 24V RS485 IO Board Optically Isolated NPN Input & 12 Relay Output Modbus RTU Module

      $17.00 - $20.00
      Min Order: 2 pieces
      CN
      3 yrs
      4.8
      /5
      ·
      26 reviews
      ·
      "Good service"
      Contact Supplier
      Acrel 300286.SZ ALP300-5 start control led display motor protector with DO relay control function

      Acrel 300286.SZ ALP300-5 start control led display motor protector with DO relay control function

      Ready to Ship
      $72.00
      Min Order: 1 acre
      Shipping per piece: $25.69
      CN
      4 yrsverify
      4.8
      /5
      ·
      10 reviews
      ·
      "fast service"
      Contact Supplier
      Mini Size IOT Remote IO Controller N4ROD08 Modbus Industrial 8 DO RS485 Relay Module DC 12V 24V

      Mini Size IOT Remote IO Controller N4ROD08 Modbus Industrial 8 DO RS485 Relay Module DC 12V 24V

      $13.00 - $16.00
      Min Order: 5 pieces
      CN
      5 yrs
      4.8
      /5
      ·
      288 reviews
      ·
      "good service"
      Contact Supplier
      N438C15 DC 12V 15 Channel RS485 RS232 Modbus RTU Relay Board PLC DO PC UART Serial Port Switch Controller Relay Module

      N438C15 DC 12V 15 Channel RS485 RS232 Modbus RTU Relay Board PLC DO PC UART Serial Port Switch Controller Relay Module

      $22.61 - $28.26
      Min Order: 5 pieces
      CN
      1 yrs
      0.0
      /5
      ·
      0 reviews
      ·
      Contact Supplier
      440R-C23139 toggle switch 440R-C23139 B converter MSR131RTP Safety Relay switch toggle 440RC23139

      440R-C23139 toggle switch 440R-C23139 B converter MSR131RTP Safety Relay switch toggle 440RC23139

      $301.99 - $401.99
      Min Order: 5 pieces
      CN
      2 yrsverify
      5.0
      /5
      ·
      6 reviews
      ·
      "Quick service"
      Contact Supplier
      CZSR8001-3A1B TUV SIL3 Ple Cat4 Safety Relay for Emergency Stop Button or Safety Gates CHENZHU DO Signal (SIS) input | 24V DC |

      CZSR8001-3A1B TUV SIL3 Ple Cat4 Safety Relay for Emergency Stop Button or Safety Gates CHENZHU DO Signal (SIS) input | 24V DC |

      $155.00 - $191.00
      Min Order: 1 piece
      CN
      8 yrs
      0.0
      /5
      ·
      0 reviews
      ·
      "Fast delivery"
      Contact Supplier
      Safety relay for SIS system controller with utilisation category 5A, relay output redundant circuit design

      Safety relay for SIS system controller with utilisation category 5A, relay output redundant circuit design

      Ready to Ship
      $95.00 - $102.00
      Min Order: 5 pieces
      Shipping per piece: $3.52
      CN
      5 yrsverify
      5.0
      /5
      ·
      1 reviews
      ·
      "good service"
      Contact Supplier
      DO Signal (SIS) | 24V DC | 1N/O+1N/C | 5A Safety relay

      DO Signal (SIS) | 24V DC | 1N/O+1N/C | 5A Safety relay

      Ready to Ship
      $159.00 - $179.00
      Min Order: 1 set
      Shipping per piece: $6.77
      CN
      1 yrs
      0.0
      /5
      ·
      0 reviews
      ·
      Contact Supplier
      General Purpose Relay Original MK2P-DO DC12

      General Purpose Relay Original MK2P-DO DC12

      $3.00 - $13.00
      Min Order: 5 pieces
      CN
      9 yrs
      4.8
      /5
      ·
      10 reviews
      ·
      "good service"
      Contact Supplier
      Acrel AM5SE Series Overload Under Voltage Frequency Thermal Overcurrent Voltage Transformer Supervision Protection Relay

      Acrel AM5SE Series Overload Under Voltage Frequency Thermal Overcurrent Voltage Transformer Supervision Protection Relay

      Ready to Ship
      $736.70
      Min Order: 5 pieces
      Shipping per piece: $20.40
      CN
      6 yrsverify
      5.0
      /5
      ·
      15 reviews
      ·
      "good order"
      Contact Supplier
      Huaqingjun 32-Channel RS485 Communication Relay Module Modbus RTU Protocol Remote Control DO Module for Home Automation

      Huaqingjun 32-Channel RS485 Communication Relay Module Modbus RTU Protocol Remote Control DO Module for Home Automation

      $99.00 - $102.00
      Min Order: 5 pieces
      CN
      6 yrs
      5.0
      /5
      ·
      3 reviews
      ·
      "fast delivery"
      Contact Supplier
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      About products and suppliers

      6250 do relays do products are offered for sale by suppliers on Alibaba.com, of which relays accounts for 1%, other relays accounts for 1%, and power relays (over 2 amps) accounts for 1%. A wide variety of do relays do options are available to you, such as general purpose, auto and protective.You can also choose from low power, high power do relays do,As well as from sealed, epoxy do relays do, and whether do relays do is electromagnetic relay, voltage relay, or standard.
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