Serial interface expansion card Unipi 1.1

Raspberry Pi

Unipi 1.1 is an extension board for the Raspberry Pi computer which allows it to function as a programmable logic controller for monitoring, control and regulation of automation systems. The board features a universal I/O architecture with digital inputs, a set of relays, analogue I/Os and broad connectivity thanks to 1-Wire bus, I2C and UART ports. Package contents Unipi 1.1 board quick start guide 26 pin (2×13) flat cable to connect Unipi 1.1 to Raspberry Pi 3× metal spacer 2M5 (20mm) 3× screw 2M5 3× nut 2M5 Basic Unipi 1.1 features 8× changeover relay (250 V AC/10A; 30 V DC/10 A) 12 + 2× galvanically isolated digital input (5-24 V DC, min. pulse length 5 ms) 2× analog input (0 - 10 V) 1× analog output (0 - 10 V) 1× 1-Wire bus 1× I2C port 1× UART port RTC module (battery not included) Inputs & outputs Digital inputs (DI) are designed to read binary logic states represented by direct voltage levels. That makes them suitable for reading data from various binary sensors and devices such as switches (on/off), motion sensors (movement detected/not detected), liquid level sensors (full tank/empty tank) etc. Note: By default the digital inputs 13 and 14 are inaccessible. For their use please visit this tutorial. Relay outputs (RO) are primarily used for switching two-state devices with higher current draw such as lightbulbs, thermoelectric valve drives, water heaters, pumps etc. Analog inputs (AI) serve for measuring 0-10V DC voltage from various analog sensors such as thermometers, pressure meters, tensometers etc.