Siemens 6ES7553-1AA00-0AB0 SIMATIC S7-1500 TM PTO 4 4-Channel Stepper Pulse Train PLC I/O Module

The Siemens 6ES7553-1AA00-0AB0 is a SIMATIC S7-1500 TM PTO 4 technology module that generates pulse train output for 4 stepper-drive axes, switching 24 V asymmetrical, RS-422 symmetrical, or 5 V TTL signal interfaces up to 1 MHz. Each channel adds 2 digital inputs and 1 digital output rated 24 V DC for synchronization, probe, and drive-ready signaling.

Technical Specifications

Selection Notes

Signal interface choice sets the achievable pulse rate: RS-422 symmetrical reaches 1 MHz, five times the 200 kHz ceiling of the 24 V asymmetrical or 5 V TTL interfaces, so select RS-422 for high-speed stepper axes and reserve 24 V asymmetrical for simpler drives or longer unshielded runs. Running all 4 channels simultaneously raises the minimum isochronous bus cycle from 250 to 375 microseconds, which affects how tightly the module's motion timing can be synchronized to the PROFINET network — account for that when only some channels are used versus a fully populated module.

Applications

Fits multi-axis stepper-drive positioning in S7-1500/ET 200MP racks: packaging line indexing, pick-and-place stepper axes, and retrofits of pulse/direction or A/B-quadrature stepper drives onto a PROFINET-based S7-1500 controller without a dedicated servo drive per axis.