Weidmuller UR20-4DI-P 1315170000 Remote I/O Module

Digital input modules P- or N-switching; Reverse polarity protection, up to 3-wire +FE
Digital input modules from Weidmuller are available in different versions and are used primarily to receive binary control signals from sensors, transmitters, switches or proximity switches. Thanks to their flexible design, they will satisfy your need for well co-ordinated project planning with reserve potential.
All modules are available with 4, 8 or 16 inputs and comply fully with IEC 61131-2. The digital input modules are available as P- or N-switching variant. The digital inputs are for Type 1 and Type 3 sensors in accordance with the standard. With a maximum input frequency of up to 1 kHz, they are used in many different applications. The variant for PLC interface units enables rapid cabling to the proven Weidmuller interface sub-assemblies using system cables. This ensures rapid incorporation into your overall system. Two modules with a timestamp function are able to capture binary signals and to provide a timestamp in 1 μs resolution. Further solutions are possible with the module UR20-4DI-2W-230V-AC which works with accurant current up to 230V as an input signal.
The module electronics supply the connected sensors from the input current path (UIN).