Siemens 6ES7550-1AA00-0AB0 SIMATIC Interface Module

Siemens 6ES7550-1AA00-0AB0 SIMATIC TM Count 2x24V is a two-channel counting module for the SIMATIC S7-1500 family. It accepts two 24 V incremental encoders or 24 V pulse sources and provides per-channel 3 digital inputs and 2 digital outputs, enabling counting and basic I/O integrated with the PLC program. The module runs from a 24 V DC supply (L+), with a permissible range of 19.2 to 28.8 V and has reverse polarity protection, drawing up to 75 mA without load. Designed for rail mounting in S7-1500 racks, it includes encoder supply connections for external encoders and integrates with STEP 7 / TIA Portal configurations for the S7-1500 platform. Typical applications include position counting and speed measurement on automation lines, conveyors, and packaging systems that require two independent 24 V encoder channels in a compact form factor.