The 6ES7550-1AA01-0AB0: S7-1500 TM Count module rated for a single 24 V DC supply, drawing 4 W. The L+ supply rail sees a 0.8 V drop, so budget that into your 24 V loop if the cabinet runs at the low end of the tolerance. Signal thresholds for incremental encoders sit at -5..+5 V for logic 0 and +11..+30 V for logic 1 — matches standard 24 V sensor levels for push-pull outputs, while the negative window accommodates differential RS422 signals. Supports fast mode with 4 bytes per channel, alongside capture, counter, and gate functions. Firmware V2.0 enables isochronous mode for synchronized axis positions.
Width 35 mm, depth 129 mm, height 147 mm. Unshielded cable max 600 m; shielded max 1 000 m. The common 24 V encoder supply output provides power for one encoder per channel — no additional external source needed for incremental types. Watch the total current draw against the backplane rating.
Current lifecycle — no end-of-life notice or phase-out. The part ships with firmware V2.0 as standard, so the BOM is locked for the product line's expected run. Sourced to order; same part, different passport — if you are cross-sourcing from multiple regions, verify the firmware version matches your project to avoid a field-update step.