Speed Monitor BA 9055 The speed monitors BA 9055 and AA 9050 monitors the rotational speed of motors. They recognise and monitor impulse signals of proximity sensors and protect machines and produced material or allows speed depending switching in production processes. Features . According to IEC/EN 60255-1 . Detection of - Underspeed - Overspeed - Standstill . Adjustable response value . BA 9055 with adjustable start-up delay . AA 9050 with adjustable hysteresis . Width 45 mm Technical specifications Width: 45mm Operate delay: Yes Enclosure design: Switch cabinet Measuring range max.: 10000 IPM Output contacts: 1 C/O contact Auxiliary voltage: AC, DC Classification: Drehzahlüberwachung Type: BA 9055 Manufacturer: E. Dold & Söhne GmbH & Co. KG Type: BA9055 AC230V 5-50IPM 1-20S Art. No.: 0027811