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The Best Serial Relay of 2023 – Reviewed and Top Rated
After hours researching and comparing all models on the market, we find out the Best Serial Relay of 2023. Check our ranking below.
2,923 Reviews Scanned
SaleRank No. #1
DC 12V 4 Channel Relay Board, DB9 RS232 Remote Control UART Serial Port Switch for Car Motor 8.5 x 4.7 x 1.8cm
- 【4 channel】 This is 4 channel relay module, 1 channel / 2 channel / 3 channel / 4 channel condition available.
- 【DC 12V+DB9 】 This relay adopted DC 12V power supply (voltage range 9-13v). RS232 DB9 female interface.
- 【fully function】 "Read", "open", "close", "Self-locking" , click, interlock 6 commands, meet your different operation purpose.
- 【current】 Standby current (all relays closed) 18MA, 1 channel relay open 50MA, 2 channel relays open 81MA, 3 channel relays open 110MA, 4 channel relays open 141MA.
- 【wide applications】 Four-channel serial port relays are often used in car kits and motor control, which can meet most industrial controls. Relay load voltage: DC 1-100V or AC85-265V, relay load current: maximum 10A. Dimensions: 90mmx47mmx19mm.
Rank No. #2
NOYITO DC 5V 12V 24V 1-Channel RS232 Serial Port Control Relay Module Multi-Function Delay Timer USB PLC RS232 Computer Control Switch
- Supply voltage: DC 5V 12V 24V ( 5 - 24V).
- Communication chip: MAX232.
- Communication protocol, format: Serial port 232 communication, the protocol is very simple, use the serial port debugging software to send the character type "A" relay to open, send the character type "a" relay to close.
- Communication format: (9600, 8, NONE, 1).
- Baud rate: 9600, 8 bits, no parity, 1 stop bit
Rank No. #3
EC Buying LCUS-2 Type Dual-Channel 2-Channel USB Relay Module 5V Relay Module Onboard CH340 Microcontroller Chip USB Intelligent Control Switch Module Power LED Indicator/Overcurrent Protection (2PCS)
- ✮Product introduction: The LCUS-2 USB relay module is equipped with a USB-to-serial chip and microcontroller with stable performance. It can use serial debugging software on the computer to send serial commands to control the opening and closing of the 2-way relays.
- ✮Features: 1. Onboard 8-bit high-performance microcontroller chip 2. Onboard CH340 USB control chip 3. Onboard power LED indicator and relay status LED indicator. 4. Support relay switch status query 5. On-board 2-way 5V, 10A/250VAC, 10A/30VDC relay, the relay has a long life and can be continuously pulled in 100,000 times 6. The module has overcurrent protection and relay diode freewheeling protection functions 7. Board size: 50*40mm
- ✮Instructions for use: 1. Connect the USB relay module to the computer, and install the driver for the CH340 USB to the serial port chip. 2. Open the serial port debugging software such as STC-ISP and SSCOM32, select the baud rate of 9600, and send A0 01 01 A2 and AO 02 01 A3 in hexadecimal (hex) format to open the first and second channels respectively. relay; send AO 01 00 A1 and AO 02 00 A2 in hexadecimal (hex) form to close the first and second relays respectively.
- ✮3. Relay status query: send FF in hexadecimal (hex) format to query, the data width returned by the serial port is 20 bytes (10 bytes for each channel), if the first channel is open, the second channel When it is off, querying the relay status will return: "CH1: ON IrInCH2: OFF In
- ✮LCS-2 type dual-channel 2-channel USB relay module: send in hexadecimal (hex) form, you can choose to send manually or automatically. Packing List: 2PCS Dual USB Relay Module
Rank No. #4
NOYITO 2-Channel Micro USB Relay Module USB Smart Control Switch USB Intelligent Control Switch (2-Channel Micro USB)
- NOYITO 2-Channel Micro USB Relay Module is equipped with a stable USB to serial port chip and a microcontroller. It can use the serial port debugging software to send serial commands on the computer to control the opening and closing of the 2-channel relay.
- Onboard high performance microcontroller chip, CH340 USB control chip.With power LED indicator and relay status LED.On-board 2-channel 5V, 10A/250VAC, 10A/30VDC relay, long relay life, can work 100,000 times continuously.
- Module with overcurrent protection and relay diode freewheel protection.
- NOYITO 8-Channel Micro USB Relay Module ASIN：B09RGTSHHW . NOYITO 4-Channel Micro USB Relay Module ASIN：B09RGVQXXT
- NOYITO 5V 2-Channel Micro USB Relay Module User Manual, Documentation, Schematic https://1drv.ms/u/s!AlzQUCOyZQhKfnmId9Qnm2btrs8?e=38YgQq
Rank No. #5
R223C16 16-Channel Relay Board DB9 Relay Module Female Interface Serial Port Smart Module for Parallel Industrial Electronics
- 【SIMPLE CONTROL】Simple operation, simple instruction, 8 working modes of opening, closing, inching, self-locking, interlocking, delay, full opening and full closing (8-byte instruction without delay mode)
- 【LOW DELAY 】Relay board has the advantage of low delay, at command and 8-byte command. The two commands are recognized automatically without switching. The maximum delay under at command is 9999 seconds
- 【EXCELLENT PERFORMANCE】This intelligent module uses 16 channel relay module, multi-channel control, RS232 DB9 female interface, convenient and practical, can let you have a good sense of experience, worthy of your trust
- 【SPECIFICATION】Power Supply: DC 12V power supply (voltage range 9-13V), Standby Current: 18MA, Interface: RS232 DB9 female interface, Two Types Of Instructions: AT and 8-byte instructions. The two types of instructions are automatically recognized without switching., Maximum delay under AT command is 9999 seconds, Size: Approx. 172 x 65 x 19mm / 6.8 x 2.6 x 0.7in, Weight: 228 g / 8 oz(approx.)
- 【APPLICATION】Relay board is widely used in elevator, automobile, automation equipment, subway, aviation, coal mine, military equipment (tank, missile, etc.), as long as it can be used in the place of automation, it can basically use relay
Rank No. #6
12V 4Ch DB9 RS232 Relay Board Remote Control UART Serial Port Switch 4 Channel Relay Module for Car Motor
- EASY TO CONTROL: The wireless remote control switch has "Read", "open", "close", "Self-locking" , click, interlock 6 commands, can satisfy most of the industrial control.
- FEMALE INTERFACE: The 4 channel relay board has RS232 DB9 female interface, with compact design, easy to carry and store.
- DURABLE: This is 4 channel relay module, made of high quality meterial strong and durable, with good performance and long service life.
- VOLTAGE RANGE: The relay module has DC 12V power supply (voltage range 9-13v), can meet your requirement.
- PRODUCT PARAMETER: Standby current (all relays closed) 18MA, 1 channel relay open 50MA, 2 channel relays open 81MA, 3 channel relays open 110MA, 4 channel relays open 141MA.
Rank No. #7
Serial Relay switch,2 Channel Serial Port Relay Module RS232 UART Protocol DB9 Interface Control Switch Board TB351
- Two‑channel relay, plus two expansion IO ports, low‑level output
- Two‑channel relay, plus two expansion IO ports, low‑level output
- Onboard 2 relay, which can be accessed extended 2‑way relay module
- With capacitor filter circuit, which has improved stability
- Simple operation, most serial commands are single‑byte commands
Rank No. #8
2 Channel Serial Port Relay Module DC 12V RS232 DB9 Interface Remote Control Low Level Output Relay Switch Board TB351
- LOW‑LEVEL OUTPUT: Relay switch board is two‑channel relay, plus two expansion IO ports, low‑level output, working voltage is DC 12V power supply (range: 8.5-13.5V), control current is 10A
- INTERFACE: Serial relay module has DB9 female/male RS232 level, can control the relay on, off, self-locking, inching through the super terminal (serial port debugging software) on the computer
- SIMPLE OPERATION: 2 channel relay module has simple operation, most serial commands are single‑byte commands, convenient to use and install
- 2‑WAY: RS232 relay switch onboard 2 relay, which can be accessed extended 2‑way relay module, stable connection, can meet your using requirement
- STABLE PERFORMANCE: 12V relay module comes with capacitor filter circuit, which has improved stability, small in size, light in weight
SaleRank No. #9
FTVOGUE DC 12V 16 Channel MODBUS RTU RS485 Relay Module Board PLC Controller Serial Port Switch
- This relay module board's working voltage is DC 12V and standby current is11mA.Under the MODBUS command mode, this relay module can support up to 64 devices in parallel.
- MODBUS commands can be made serial HyperTerminal (serial assistant) or "Modbus Poll" enter,and MODBUS RTU command control mode, the maximum delay is 255 seconds.
- MODBUS command mode (HEX), you can control a variety of ways: Serial Hyper Terminal Control (need to manually add the CRC), Modbus Poll software control (software automatically add the CRC), PLC or MCU process control.
- This relay module has 6 commands: "Open", "close", "Momentary", "Self-locking", "Interlock" and "Delay".
- We strive to provide you with the highest quality product and the best customer experience, if you're not entirely satisfied, please just feel free to contact us at any time.
Rank No. #10
LEFITPA 3 Pack Replacement 98-7249 Starter Relay Switch for Husqvarna IZ4821T for Ariens EZR1440 EZR1540 EZR1640 EZR1648 EZR1742 for Exmark Lazer Z Serial No. 102,000-370,000 with 52" 60" 72" Deck
- Replaces Part Number: For Gravely 00432100, 00432101, 040216
- Compatible With: For Exmark Lazer Z, Serial No. 102,000-370,000 with 52", 60" and 72" Deck
- Compatible With: For Husqvarna IZ4821T, IZ6125T, LZ5227TXP, LZ6127T
- Package Includes: 3 x Starter Relay Switch
- Every Product from LEFITPA will enjoy 30 days Money-back and 18-Month Worry-free Warranty; If you have any questions, please feel free to contact us.
Rank No. #11
Walfront DC 12V 1 Channel RS232 Delay Relay Module, RS232 Delay Relay Module 1 Channel Serial Port UART Multifunctional DC12V R223B01
- With two serial ports, RS232 DB9 interface and TTL232 interface
- With AT instruction and 8-byte instruction, the two instructions are automatically recognized, no need to switch
- 6 working modes, open, close, jog, self-lock, interlock, delay (8-byte instruction without delay mode)
- Maximum delay of 9999 seconds under AT command
- Adopted of high quality electronic components, and accuracy process, ensure for the durability
SaleRank No. #12
Stens New Relay Assembly 430-300 Compatible with Ariens EZR1440, EZR1540, EZR1640, EZR1648 and EZR1742, Exmark Lazer Z, Serial No. 102,000-370,000 with 52", 60" and 72" Deck 00432100, 00432101
- Specs: Description: Relay Assembly, Made By: An OEM Supplier, No of Terminals: 5
- Replaces OEM Numbers: Ariens: 00432100, 00432101, 03042800, AYP: 109748X, 532109748, Briggs & Stratton: 109748, Exmark: 98-7249, Gravely: 00432100, 00432101, 040216, Husqvarna: 532109748, 539102914, Scag: 48788
- Compatible With/Replacement For: Ariens: EZR1440, EZR1540, EZR1640, EZR1648 and EZR1742, Exmark: Lazer Z, Serial No. 102,000-370,000 with 52", 60" and 72" deck, Gravely: Promaster 30-H, 50, 200, 300 and 400, Husqvarna: IZ4821T, IZ6125T, LZ5227TXP and LZ6127T
- Stens 1 year warranty ensures reliability and performance for every part. We're confident that our products will work flawlessly, but in a rare case that it does not, we'll replace it anytime within one year of your order.
- Stens branded parts are trusted by professional dealers to perform OEM quality repairs. The Stens name is featured on all Genuine Stens product packaging.
Rank No. #13
DC 12V Relay Module 8 Channel MODBUS RTU RS485 Relay Board PLC Controller Serial Port Switch with DIN35 Rail Box for Arduino
- DC 12V Relay Module 8 Channel MODBUS RTU RS485 Relay Board PLC Controller Serial Port Switch with DIN35 Rail Box for Arduino
Rank No. #14
AIHJCNELE ESP8266 ESP-01S Serial Module + DC5V Relay Module Remote Smart Control Switch 5V-12V Controller 1-Channel Relay Board ESP01S 10A250VAC 10A125VAC 10A30VDC Low Level Trigger
- ✅New version, more thick wire trace can through more current. Support ESP -01. Added optocoupler, improved module performance. low level trigger. Wide voltage input, support DC 5V ; Transmission distance: the maximum distance of 400m (open environment) ; It is designed for smart home, office and other DIY project.
- ✅Based on ESP-01S module ; Designed for smart home,internet and other DIY projects. With this smart relay, you will easy to DIY your smart switch to control any device by your phone anywhere.Providing APP and LUA source programs. It can be controlled remotely ; Light weight, compact size and very easy to install in a small case
- ✅For specific product details and parameter information, please refer to the product description at the bottom of the page. For more information on how to use the product, please refer to the product description.
- ✅Please Note that , This is a precision product, Please use with care. You need professional knowledge to use this product. If the product is damaged due to an operating error, it cannot be returned. beg to be excused. All products are factory tested. Tools DIY products. Please understand. Thanks .
- ✅If the product has any quality problem , pls contact us by email , How to contact us ? Please click “ AIHJCNELE ”(you can find "Sold by AIHJCNELE " under Buy Now button), in the new page, click “Ask a question” to email us
Rank No. #15
RS485 MODBUS RTU Serial Port Multi-Function Relay Module Ultra-Small PLC Controller 12V 1 Channel
- 【Six Working Modes】: The relay module includes six working modes: open, close, micro-motion, self-locking, interlocking and delay.
- 【Two Command Control Modes】: The relay module includes AT command and MODBUS command control modes. Under the MODBUS command mode, it can support up to 32 devices in parallel.
- 【Maximum Delay Time】: Under the AT command, the maximum delay is 9999 seconds; under the MODBUS command, the maximum delay is 255 seconds.
- 【Command Input】: AT command can be input through serial hyper terminal (serial assistant); MODBUS command can be input through serial hyper terminal (serial assistant) or "Modbus polling" to input MODBUS command.
- 【After-Sales Service】:We strive to provide you with the highest quality product and the best customer experience, if you're not entirely satisfied, please just feel free to contact us at any time.
Rank No. #16
JESSINIE USB Serial Port Control Relay Module Sturdy Durable Lightweight USB Relay Module USB Intelligent Control Switch Overcurrent Protection Intelligent Command Control Switch Intelligent Home
- The LCUS-1 USB relay module is equipped with a USB to serial port chip with stable performance and a microcontroller. It can use serial port debugging software to send serial port instructions at the computer end to control the opening and closing of the 1-way relay.
- Protection function: The relay module has overcurrent protection and relay diode freewheeling protection function
- Relay: on-board 5V, 10A/250VAC, 10A/30VSC relay, with long service life and can be continuously closed for 100000 times
- LED indicator: onboard power LED indicator and relay status LED indicator
- Controller chip: on-board high-performance micro-control chip onboard CH340 USB control chip, without any driver, plug and play, easy to use
Rank No. #18
Mindhunter: Inside the FBI's Elite Serial Crime Unit
- Amazon Kindle Edition
- Douglas, John E. (Author)
- English (Publication Language)
- 445 Pages - 11/26/1998 (Publication Date) - Scribner (Publisher)
SaleRank No. #19
The Jameson Brothers
- Audible Audiobook
- Leslie North (Author) - Marcio Catalano, Marnye Young, Veronica Pace (Narrators)
- English (Publication Language)
- 10/08/2018 (Publication Date) - Relay Publishing (Publisher)
Rank No. #20
The Most Epic Treasure Hunt Ever!
- Amazon Prime Video (Video on Demand)
- Roman Pasino, Tiana Monique Jung, Amber Tomblin (Actors)
- Dave Woodgate (Director)
- English (Playback Languages)
- English (Subtitle)
Last update on 2023-08-21 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API
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FAQ:
Q: How are serial relays used to control electronics?
A: Our Serial Relay Controllers are the simplest and most reliable way to control electronics. Connect the RS-232 Module on the board to your computer or ECM. You can do this using a standard Serial Port or you can use a Serial to USB converter. Once its connected you can simply open a Serial Port (COM Port on Windows) and start 2-way communications.
Q: What kind of contact does a relay have?
A: Each relay has a normally open contact, a normally closed contact and a common contact. When relay absorps, the common contact and normally open contact conduct; when the relay releases, public contact and normally closed contact conduct.
Q: Why are RS-232 Relays still around after 50 years?
A: RS-232 Relays are the ultimate in reliability. There is a reason Serial Communications are still around after 50 years and that is because they’re basically bulletproof. Our industrial grade relay controllers all come equipped with a swappable communication interface.
Q: How to connect a serial controller to a computer?
A: Connect the RS-232 Module on the board to your computer or ECM. You can do this using a standard Serial Port or you can use a Serial to USB converter. Once its connected you can simply open a Serial Port (COM Port on Windows) and start 2-way communications. NCD Offers a wide range of Relay Controllers that may be equipped with s serial interface.