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Input Power: 5V DC (160MA)
5V solid state relay 240V 2A, the output with a resistive fuse 240V 2A.
Size:
2 Way: 55 * 33 * 25 (L * W * H)
4 Way: 57 * 55 * 25 (L * W * H)
8 Way: 106 * 56 * 25 (L * W * H)
The Input Control Signal Voltage:
High Level Module: (0-2.5V state low level relay ON)
(3.3-5V state high level relay OFF)
Low Level Module: (0-2.5V state low level relay OFF)
(3.3-5V state high level relay ON)
There are 2.54CM pin and blue KF301 terminal control line is more convenient.
Input Section:
DC +: Connect the power supply positive (according to the relay voltage)
DC-: Connect the power supply negative
CH2: 2-channel relay module signal to trigger the end (high level trigger effective)
CH4: 4-channel relay module signal to trigger the end (high level trigger effective)
CH8: 8-channel relay module signal to trigger the end (high level trigger effective)
High and Low Meaning:
High-level trigger refers to the signal trigger side (IN) and the negative power supply has a positive voltage between the positive and the power supply is usually connected to the trigger side of a trigger, when the trigger side voltage or trigger to reach the trigger Voltage, the relay is pull.
Low-level trigger refers to the voltage between the signal trigger terminal and the negative terminal of the power supply is OV, or the voltage of the trigger terminal is lower than the voltage of the positive terminal of the power supply. When the voltage is low enough to trigger, the relay is pulled in, The negative side of the power supply is connected to the trigger side of a trigger, so that the relay is pull.
Christopher Hunt
2025-06-22 13:59:30
Open packed (purchased 2) and visually inspected the products. The back of both had bad solder joints and scarring on the pbc back. This is a reworked product or if it is new it is poorly assembled and soldered. I still figured I would give it a chance. Used leads to hook up to arduino and saw the red lights function as programmed. Took a few days to build my project and I discovered that all the relays from both boards I ordered are stuck open, so they are never off. They are high level trigger and normally closed relays, so they should start off and then turn on, but they are constantly on (you can even see the light on the front of the board turn on and off according to program, but relays remain closed) . I tested with another relay I have and that one worked so it isn't the programing.
Tung Vu
2025-06-04 16:12:22
these relays are awesome!!!! they dont make any clicking sound and im amazed such an option exists!while these SSRs cost twice the price of a normal relay, i think they are worth the price if you cannot stand the clicking sound of a normal relay. wiring of the NO contacts were different than what i read online. luckily i used a continuity test and was able to figure how to get the SSR to work with the rpi3.
Dachshund Digital
2025-02-02 11:50:44
Do not buy! Relay quality is horrible. I purchased 2 2 channel relays and 1 channel on each relay failed after a few minutes of use. Unfortunately I did get chance to test these boards before now, so the 30 day return window is closed. But I will never buy SSR based relay boards again. For both boards to have 1 relay fail so quickly? They should have worked for 100s of hours with no issues. I was only running 5v DC power across the relays so this is not a case of them being abused or over current loading!
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