Smart Relay 4 G2 – Four Channel Smart GPIO Converter

The Smart Relay 4 G2 provides four independent GPIO interfaces in one box, each equipped with two optically isolated inputs (wet or dry) and a 2PDT relay output.


The Smart Relay 4 G2 is perfect for converting differing logic levels to contact closures. Additional features include: Independent user programmable Boolean logic and pulse stretching (delays) from 50ms to 99 hours, 59 minutes, 59.99 seconds.


•  All I/O connections via pluggable screw terminal blocks.
•  Each 2PDT relay channel can be configured with two independent optically isolated inputs configurable for dry signals or wet signals (5-24 VDC, or 25-48 VDC via an external resistor.)
•  LED status indicators are provided for each relay, input, and power.
•  Fifteen logic functions include, sustained, toggle, set-reset (flip-flop), dual alternate action or failing/rising edge, along with additional Boolean logic functions.
•  Independent pulse stretcher or time delays may be user programmed from 50ms to 99 hours, 59 minutes, 59.99 seconds.
•  Timing and mode configuration from a non-dedicated PC using the USB-serial connection.


•  Convert differing logic levels to 2PDT contact closures.
•  Time delay relays
•  Pulse stretcher
•  Sustained contact to pulse converters
•  Rising and/or falling edge pulse converters
•  Latching (flip-flop) relays
•  Toggle action relays
•  Dual alternate action relays
•  Additional Boolean logic functions include: XOR, AND, NAND, OR, NOR.