8 channel solid state relay (SSR) module

Very easy to use with an Arduino. Just needs 2 wires for GND + 3.3V and 8 wires for the 8 relays. You can use the newer arduinos that are in 3.3 V logic or a Raspberry Pi GPIO (also in 3.3 V logic) or any of the older Arduino (Uno, Mega) which are 5V.
The outputs relays are silent .

These are zero-crossing PhotoTRIACs with snubber circuits. Their load rating is up to 2 A at 100-250 VAC.
Works fine with low-voltage 16 VAC too, for example model train accessories power supply.

Module interface:
Input section:

• DC +: positive power supply (by relay voltage power supply)
• DC-: connect power negative
• CH1: 1 relay module signal to trigger the end (Low level trigger effective)
• CH2: 2-channel relay module signal to trigger the end (Low level trigger effective)
• CH3: 3 relay module signal to trigger the end (Low level trigger effective)
• CH4: 4-channel relay module signal to trigger the end (Low level trigger effective)
• CH5: 5 relay module signal to trigger the end (Low level trigger effective)
• CH6: 6-channel relay module signal to trigger the end (Low level trigger effective)
• CH7: 7 relay module signal to trigger the end (Low level trigger effective)
• CH8: 8-channel relay module signal to trigger the end (Low level trigger effective)

Technical Specifications:

• SainSmart 5V solid state relays per channel 250V 2A, output with resistive fuse 250V 2A
• 8 channel 2 AMP Solid State Relay board Good for lighting- holiday displays etc
• The input control signal voltage: (0V LOW solid state relay ON)
• Rated output load: 2A at 100 to 240VAC (50/60Hz)
• Load voltage range: 75 to 264VAC (50/60Hz)
• Load current: 0. 1 to 2 AMP
• Power supply: 5VDC / 160mA (all channel ON)
• Load type: General purpose
• Isolation: Phototriac
• Zero cross: Yes
• Product Dimensions: 155 x 55 x 24 mm