Grove - Solid State Relay Release date： 9/20/2015 Version： 1.0 Wiki: http://www.seeedstudio.com/wiki/Grove_-_Solid_State_Relay Bazaar: http://www.seeedstudio.com/depot/Grove-Solid-State-Relay-p-1359.
Document Revision History Revision Date Author Description 1.0 Sep 21, 2015 Victor.
Contents Document Revision History ···································································································2 1. Introduction ···················································································································2 2. Features··························································································································3 3.
Disclaimer For physical injuries and possessions loss caused by those reasons which are not related to product quality, such as operating without following manual guide, natural disasters or force majeure, we take no responsibility for that. Under the supervision of Seeed Technology Inc., this manual has been compiled and published which covered the latest product description and specification. The content of this manual is subject to change without notice.
1. Introduction Grove – Solid State Relay is a non-contact electronic switch module that has relay features. Based on S208T02, it has a maximum output of 250VAC/4A, with a switching speed less than 10ms. This module is equipped with acrylic base and a 3D-printed protection insulation shield, for user’s safety. The featured LED indicates that the relay is on.
2. Features 3D-printed protection insulation shield Compatible with both 3.
3. Application ideas Operations that require low-latency switching, e.g. stage light control Devices that require high stability, e.g. medical devices, traffic signals Situations that require explosion-proof, anticorrosion, moisture-proof, e.g. coal, chemical industries.
4. Specifications Item Min Typical Max Uint Input Voltage 3.0 3.3 5.0 VDC Input Current 16 20 50 mA Output Voltage -- 220 250 VAC Output Current -- -- 4.0 A Operating frequency 45 50 65 Hz Operating temperature -25 25 85 ℃ Turn-on time -- 10 -- ms Turn-off time -- 10 -- ms Dimension 44x44x32 mm Net Weight 25.
5.
6. Cautions If the output voltage is higher than 36V, you need to ensure the module is in the off state before you operate with the screws. The heat sink can be in very high temperature, do not touch it during use.
7. Usage 7.1 With Arduino The Grove - Solid State Relay has a variety of applications. Here we elaborate on how to use it to control a bulb. First off, you'll need to connect it to the Arduino like so: 1. Connect the Grove - Solid State Relay to Digital 13 of Grove-Base Shield via a Grove 4 pin wire. 2. Plug Grove-Base Shield onto Arduino and connect Arduino to PC via a USB cable. 3. Connect the bulb to OUTPUT of Grove - Solid State Relay. You need upload the below code.
void loop() { digitalWrite(ssrControlPin, HIGH); delay(5000); // set the SSR on // wait for 5 second digitalWrite(ssrControlPin, LOW); delay(5000); // set the SSR off // wait for 5 second After uploading the code, you can see the bulb will light 5s and then turn off for 5s, and so on. 7.2 With Raspberry Pi 1. You should have got a raspberry pi and a grovepi or grovepi+. 2. You should have completed configuring the development environment, otherwise follow here. 3. Connection.
except KeyboardInterrupt: grovepi.digitalWrite(relay,0) break except IOError: print "Error"} 5. Run the demo. sudo python grove_solid_state_relay.
8. Test Report 8.1 Experimental purposes 1) Thermal performance of Grove – Solid State Relay（S208T02） 2) Limit load current of Grove – SSR 3) Measures to improve the limit load current 8.2 Experimental Principle By recording SSR chip temperature at different current and different time points, analysis the data and draw conclusions. Figure 1 is screenshot from S208T02 datasheet, we can see that at different heat sink and different temperature, SSR’s current is different.
1min 5min 10min 20min stable time 0.5A 31.40 33.75 34.75 35.00 15min 1A 31.8 36.75 39.6 40.56 18min 2A 34.5 46.6 48.88 51.13 20min 3A 35.56 52.81 58.88 60.06 17min 4A 38.00 57.88 63.88 67.00 19min 5A 44.00 66.00 73.12 75.37 19min Note 1: The unit of temperature in the table is ℃ Note 2: When tested room temperature is 28 ℃ 8.
9. Expansion experiment From the above experimental results, the following conclusions can be drawn: 1) When current is fixed, with the passage of time, the temperature will stabilize at a certain value. This value is related with the current, the current increases, the stable temperature are greater. At 2A, stable temperature will be more than 50 ℃, So, when the SSR work, you should not touch it.
10. Support Ask questions on Seeed forum.
11.
