The SX15U-05S is a digital input/output module from Kaga Electronics. It is designed for industrial applications and features 4 digital inputs, 5 digital outputs, and one analog input. It has a 5-volt power input, with a current capacity of 500mA, and a 30V DC input voltage range. It is also equipped with opto-isolated inputs and outputs, enabling it to withstand high temperatures and corrosive environments. Additionally, the SX15U-05S supports two external communication protocols, RS485 and Serial Peripheral Interface (SPI).