1771 PLC-5 System, Intrinsically Safe Fast Millivolt Input Module, 0-50mV, 8 Input, differential, low-levels, Input voltage range: 0-50mV, Resolution: 12-bit binary, Linearity: В±1 LSB, Repeatability: В±1 LSB, Input overvoltage protection: 32V, Maximum input voltage: В±10V