Product details pictures Product Overview: Siemens 6SE6400-0EN00-0AA0 Parameter Specification Brand Siemens Order Number 6SE6400-0EN00-0AA0 Product Family MICROMASTER 4 (MM420/MM440) option module Product Type Encoder evaluation / feedback module (option board) — not a drive or power module Application & Fault Scenarios Typical Uses: Adds real speed feedback to MM440 drives for closed-loop vector control in printing & converting lines, winders/unwinders, textile machines,