Siemens 505-6108A 8-Channel Analog Input Card

Siemens TI505 505-6108A is an eight-channel analog input module for the TI 505 PLC family. The PPX:505–6108A provides eight analog input channels that can accept current or voltage signals and converts each channel to a 12-bit digital value that the TI 505 CPU reads via the system backplane. Per-channel voltage ranges include 0–5 V DC and ±5 V DC, enabling both unipolar and bipolar sensor outputs without additional conditioning for many applications. As part of Siemens’ SIMATIC TI 505 analog I/O family, the 505-6108A is a single-width module designed to be installed alongside other I/O cards in TI505 racks, delivering scalable data from process instruments to the controller. The module is commonly referenced in product literature as eight-channel analog input (PPX:505–6108A) for TI505, with related variants like 505–6108B offering similar functionality. In practical use, the card supports parallel sampling of eight separate analog signals, simplifying wiring and reducing cabinet footprint in legacy automation setups that rely on the TI505 platform for monitoring and control tasks such as temperature, pressure, and level sensing via voltage-based sensors. This TI505 analog input card represents Siemens’ approach to compact, modular analog I/O for mid-century SIMATIC systems, providing reliable, channelized data to drive digital logic and data logging within older but still supported control architectures.