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actor:relay_moduls [2026/05/14 20:31] – [lamaPLC: Multi-channel optocoupled relay module] vamsanactor:relay_moduls [2026/05/15 00:12] (current) – vamsan
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 Understanding relay voltage ratings is essential for microcontrollers. For Arduino, 5V/3.3V relays are typical, whereas Raspberry Pi Micro and ESP32/3286 generally require 3.3V relays.  Understanding relay voltage ratings is essential for microcontrollers. For Arduino, 5V/3.3V relays are typical, whereas Raspberry Pi Micro and ESP32/3286 generally require 3.3V relays. 
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 +For high-speed AC switching, it is recommended to use a [[ssr_moduls|Multi-channel Solid State Relay (SSR) Module]] instead.
  
 {{ :actor:multi_channel_relay_1.png |Multi-channel optocoupled relay module}} {{ :actor:multi_channel_relay_1.png |Multi-channel optocoupled relay module}}
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 <color red>If the Arduino output becomes overloaded, the unit will turn off and then restart. If the overload continues, the relays will cycle on and off, producing a distinctive clicking sound.</color> <color red>If the Arduino output becomes overloaded, the unit will turn off and then restart. If the overload continues, the relays will cycle on and off, producing a distinctive clicking sound.</color>
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 +{{page>:tarhal}}
  
  
 ==== Compare various multi-channel optocoupled relay modules ==== ==== Compare various multi-channel optocoupled relay modules ====
 ^Module Name^Channel Count^Controller/Coil DC Input^Output Capacity (Max DC)^Output Capacity (Max AC)^Controller-Side Input Current (Per Active Pin)| ^Module Name^Channel Count^Controller/Coil DC Input^Output Capacity (Max DC)^Output Capacity (Max AC)^Controller-Side Input Current (Per Active Pin)|
-|HL-54|4 Channels|5V |DC30V DC @ 10A|250V AC @ 10A|2 mA – 5 mA (Logic Only via Optocoupler)|+|HL-54|4 Channels|5V / 3.3V *|DC30V DC @ 10A|250V AC @ 10A|2 mA – 5 mA (Logic Only via Optocoupler)|
 |HW-316|4 Channels|5V DC30V DC @ 10A|250V AC @ 10A|15 mA – 20 mA| |HW-316|4 Channels|5V DC30V DC @ 10A|250V AC @ 10A|15 mA – 20 mA|
 |KY-019|1 Channel (Available up to 8)|5V DC (3.3V to 12V variants)|30V DC @ 10A (Some boards 28V @ 5A)|250V AC @ 10A (Some boards 50V @ 5A)|15 mA – 20 mA (Transistor base/LED pull)| |KY-019|1 Channel (Available up to 8)|5V DC (3.3V to 12V variants)|30V DC @ 10A (Some boards 28V @ 5A)|250V AC @ 10A (Some boards 50V @ 5A)|15 mA – 20 mA (Transistor base/LED pull)|
 |HFD4/3-S \\ (Raw Relay)|1 Channel (Component)|3V DC (Standalone coil)|220V DC @ 2A|250V AC @ 0.5A|33.3 mA (Requires external driver circuit/diode)| |HFD4/3-S \\ (Raw Relay)|1 Channel (Component)|3V DC (Standalone coil)|220V DC @ 2A|250V AC @ 0.5A|33.3 mA (Requires external driver circuit/diode)|
 |FY-T734 \\ (GEYA)|4 Channels|5V DC, 12V or 24V AC/DC|30V DC @ 10A|250V AC @ 10A|~21.8 mA (Industrial terminal input)| |FY-T734 \\ (GEYA)|4 Channels|5V DC, 12V or 24V AC/DC|30V DC @ 10A|250V AC @ 10A|~21.8 mA (Industrial terminal input)|
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 +* //3.3V, if the relay is labeled 03VDC.//
  
 ===== Sensor topics on lamaPLC ===== ===== Sensor topics on lamaPLC =====