• Compact unit to monitor forward / reverse motion and standstill of machines • Universal pulse inputs for use with all common incremental encoders and sensors (HTL, RS422 or TTL) • Two potential-free changeover relay outputs as well as two fast-responding power transistor outputs • Wide input frequency range (up to 500 kHz) and a fast response time ( 1 kHz) • Compact housing for simple snap fitting on top hat rails (EN 60715) • Easy to set up by two front DIL switches • 17 to 30 VDC power supply