545-1101 Siemens PLC Module for Industrial Control Systems

Description

The Siemens 545-1101 PLC Module is a central processing unit designed for the SIMATIC TI545 programmable logic controller. Released in the late 1990s, this module became a trusted solution for mid-range automation systems across manufacturing, energy, and infrastructure sectors. It delivers real-time control, flexible I/O support, and robust communication capabilities, making it suitable for both discrete and process automation. Powered by a Motorola 68000 processor running at 8 MHz, the 545-1101 handles complex logic operations with speed and reliability. It includes 28 KB of RAM and 64 KB of ROM, allowing engineers to store user programs, data blocks, and diagnostic routines. Moreover, it supports Siemens STEP 5 software, enabling efficient programming and system integration. Although discontinued, the 545-1101 remains widely available through industrial resellers and is still used in legacy systems requiring long-term support and minimal downtime.