Grove - Optocoupler Relay (M281)

This module is a bi-directional SPSD(single-pole, single-throw), normally open solid state relay(SSR). The Grove Optocoupler Relay (M281) offers very low on-resistance, which allowing a high load current rating.

Unlike the other TRIAC SSR in our website, this relay is based on MOSFET, so it can carry both AC load and DC load. If you need to use a SSR with the DC load, this is what you want!

Version

Product Version	Changes	Released Date
Grove-Optocoupler Relay (M281)	Initial	Dec 2018

Features

• Low on-resistance(0.5Ω MAX.)
• 1A continuous load current
• 60V load voltage rating
• Low input control current(3mA TYP.)
• High input-to-output isolation(1.5kV MIN.)

Applications

• Automated Test Equipment
• Meter reading systems
• Medical equipment
• Battery monitoring
• Multiplexers

Specification

Parameter	Value
Supply voltage	3.3V / 5V
Operating temperature	-40 – 85℃
Storage temperature	- 55°C – 125°C
Blocking voltage	60 V
Continuous load current	1A
Leakage current	0.2 uA(TYP.) 1 uA(Max.)
On-Resistance	0.5 Ω(TYP.) 0.7 Ω(Max.)
Isolation resistance	100 GΩ
Turn-On time	1.4 ms(TYP.) 5 ms(Max.)
Turn-Off time	0.2 ms(TYP.) 2 ms(Max.)
Interface	Digital
Size	L: 40mm W: 20mm H: 13mm
Weight	10.6g
Package Size	L: 135mm W: 85mm H: 13mm
Gross Weight	11g

Table 1.General Specification

Hardware Overview

Pinout

Figure 1. Pinout

Platforms Supported

Arduino	Raspberry Pi

Getting Started

Play With Arduino

Hardware

Materials required

Seeeduino V4.2	Base Shield	Grove - Optocoupler Relay (M281)	Red LED
Get ONE Now	Get ONE Now	Get ONE Now	Get ONE Now

In addition, you can consider our new Seeeduino Lotus M0+, which is equivalent to the combination of Seeeduino V4.2 and Baseshield.

备注

**1** Please plug the USB cable gently, otherwise you may damage the port. Please use the USB cable with 4 wires inside, the 2 wires cable can't transfer data. If you are not sure about the wire you have, you can click [here](https://www.seeedstudio.com/Micro-USB-Cable-48cm-p-1475.html) to buy

**2** Each Grove module comes with a Grove cable when you buy. In case you lose the Grove cable, you can click [here](https://www.seeedstudio.com/Grove-Universal-4-Pin-Buckled-20cm-Cable-%285-PCs-pack%29-p-936.html) to buy.

Hardware Connection

• Step 1. Plug Grove - Base Shield into Seeeduino.

• Step 2. Connect the Grove - Optocoupler Relay (M281) to the D5 port of the Base Shield.

• Step 3. Connect the LED and the Grove - Optocoupler Relay (M281) to the 3.3V and GND pin of the Grove - Base Shield.(Please refer to the figure below)

• Step 4. Connect Seeeduino to PC via a USB cable.

Figure 2. Pinout, please make sure connect to the 3.3v pin, 5v will damage this LED.

Software

备注

    If this is the first time you work with Arduino, we strongly recommend you to see [Getting Started with Arduino](https://wiki.seeedstudio.com/Getting_Started_with_Arduino/) before the start.

• Step 1. Copy the following code into a new sketch in the Arduino IDE

const int Pinout = 5;      

void setup() {
 pinMode(Pinout, OUTPUT);
 Serial.begin(9600);
}

void loop() {

  digitalWrite(Pinout, HIGH); 
  delay(500);
  digitalWrite(Pinout, LOW); 
  delay(500);
}

• Step 2. Upload the demo. If you do not know how to upload the code, please check How to upload code.

提示

If everything goes well, we will see the LED flashing.

Schematic Online Viewer

Resources

• [ZIP] Grove - Optocoupler Relay (M281) Schematic file
• [PDF] M281 Datasheet

Tech Support

if you have any technical issue. submit the issue into our forum.