Siemens 6ES7231-5PF30-0XB0 RTD/resistance input module reads Pt100, Ni100, and Cu10 sensors, plus direct resistance up to 600 Ω, with -40 to 70 °C operating range, 1.5 W, diagnostic alarms and wire-break detection.
The closest functional sibling is the SIPLUS variant 6AG1231-5PD32-4XB0, which uses the same signal chain and connector pinout. The standard 6ES7231-5PF30-0XB0 covers ambient temperatures from -40 to 70 °C and lacks the conformal coating of the SIPLUS line. If the panel needs extended temperature range (down to -40 °C is already matched), or resistance to condensation and corrosive gases, the SIPLUS part is the correct choice. For clean indoor cabinets, this standard module drops right in without rewiring.