Siemens 505-4316-A Industrial Digital Input Module

Siemens 505-4316-A is a 16-channel digital input module designed for TI505 PLC systems. This single-wide card plugs into the TI505 backplane and draws power from the base, with a minimum power draw around 2.0 W. It provides 16 IEC Type 1 digital inputs rated for 24/48 VDC signals, accommodating a range of field devices in TI505 installations. For input thresholds, the module specifies an ON voltage of 14.0 VDC minimum up to 30.0 VDC maximum, and an OFF range around 0.0–5.0 VDC, with ON current typically between 2.0 and 15.0 mA and OFF leakage near 0.5 mA. The internal propagation delay through the module is specified as about 3.0 ms to 10.0 ms. As a TI505 digital input card, the 505-4316-A is suited for reading signals from sensors, switches, and other 24/48 VDC devices, enabling straightforward interfacing of field inputs to the TI505 CPU while maintaining a compact, single-wide footprint. This module is commonly used in legacy TI505 automation setups where multiple digital inputs are required in a compact form factor, delivering reliable sensing for basic machine sequencing, start/stop conditions, and simple interlock logic within a TI505-based control scheme.