857-400 WAGO Signal Relays

Wago 857-400 is an amplifier designed for sensor applications, featuring single-channel isolation with zero/span adjustment capabilities. It operates on a supply voltage range of 16.8-26.4Vdc, with a nominal 24Vdc, and does not require an AC supply voltage. The device offers push-in CAGE CLAMP spring connections for easy installation and is equipped with a DIP switch for configuration. It is designed to operate within an ambient air temperature range of -25°C to +70°C and can be stored in temperatures ranging from -40°C to +85°C. The 857-400 supports a control voltage (DC) and utilizes an IP20 communication protocol. It has a rated insulation voltage (Ui) of 6 mm and is suitable for mounting on a DIN-35 rail. The device's dimensions are H94mm x W6mm x D97.8mm, and it features a response time configurable between 100Hz and 5kHz via DIP switch or software. Its mechanical resistance includes 1 x analog input and 1 x analog output, supporting various signal ranges. The maximum continuous operating voltage (Uc) is 25mA at 24Vdc nominal load, with a transmission error of ≤ 0.1% and a temperature coefficient of ≤ 0.01%/K. It is designed to operate in environments with 5-95% relative humidity, with no condensation permissible.