What is it?

• Relay Extension (for example for Smart Home applications)
• 4 outputs each can drive 16A
• High quality industrial grade relays (this is also the main reason for the high price)
• DIN rail mount (width of the module is 71mm)
• 24V supply needed
• digital input variant with 1 input per output or analog input variant where 1 voltage can control all 4 relays

Why did you make it?

On many Loxone smart home systems, analog outputs remain unused and it is only possible to get a relay extension with 12 outputs for around 500$. So I wanted to create a cheaper solution to have outputs which can switch 16A with the use of the analog output.

What makes it special?

• High quality industrial grade relays (Schneider Electric)
• Specified mechanical life cycle: 30 million switches!
• Up to 16A switching current (at up to 250V AC or up to 28V DC)
• Of course, the PCB and all plugs are also designed for 16A / 250V
• Very low input current (maximum 1mA for a 10V input signal)

Normal Variant

• 4 inputs (1 input for each output)
• 0V to 4V will switch the relay OFF
• 4.5V to 24V will switch the relay ON

Voltage Controlled Variant

• 1 analog input (which controls all 4 outputs - 16 different states possible)
• 0V to 10V will control what relays will be switched
• state 01: 0V (to 0.4V) will switch all relays OFF
• state 02: 0.95V will switch output 1 ON and outputs 2,3,4 OFF
• state 03: 1.55V will switch output 2 ON and outputs 1,3,4 OFF
• state 04: 2.2V will switch outputs 1,2 ON and outputs 3,4 OFF
• state 05: 2.8V will switch output 3 ON and outputs 1,2,4 OFF
• state 06: 3.45V will switch outputs 1,3 ON and outputs 2,4 OFF
• state 07: 4.05V will switch outputs 2,3 ON and outputs 1,4 OFF
• state 08: 4.7V will switch outputs 1,2,3 ON and output 4 OFF
• state 09: 5.3V will switch output 4 ON and outputs 1,2,3 OFF
• state 10: 5.95V will switch outputs 1,4 ON and outputs 2,3 OFF
• state 11: 6.55V will switch outputs 2,4 ON and outputs 1,3 OFF
• state 12: 7.2V will switch outputs 1,2,4 ON and output 3 OFF
• ...
• state 16: (9.5 to) 10V will switch all 4 outputs ON
• every state has an area of around 0.1V between the steps where nothing will happen to not randomly switch relays
• the voltage must be stable for around 100ms - otherwise, the outputs will not be changed to not randomly switch the relays during voltage changes

Ordering Info

If you want to have only a PCB or only a case or so just contact me. Also if you need multiple pieces just contact me - as some parts are quite expensive I only have a few on stock, but I can reorder them within a few days.