References
- Gorgs K-J, Grigulewitsch W, Kleinbreuer W. Elektrohydraulische Stetig-Wegeventile mit Sicherheitsverantwortung. O+ PÖlhydraulik und Pneumatik 2001;45(11–12):745–8.
- Kleinbreuer W, Kreutzkampf F, Meffert K, Reinert D. Categories for safety-related control systems in accordance with EN 954–1 (BIA Report 6/97e). Sankt Augustin, Germany: Hauptverband der gewerblichen Berufsgenossenschaften (HVBG); 1997. Retrieved February 1, 2005, from: http://www.hvbg.de/e/bia/pub/rep/rep02/bia0697.html
- European Committee for Standardization (CEN). Safety of machinery—safety-related parts of control systems (Standard No. EN 954–1:1996). Brussels, Belgium: CEN; 1996.
- European Committee for Standardization CEN). Safety of machinery—safety-related parts of control systems. (Standard No. EN 954–2:2000). Brussels, Belgium: CEN; 2000.
- Mannesmann Rexroth. 4/2 and 4/3 proportional directional valves, directly controlled, with electrical position feedback. Types 4WRE and 4WREE. 2004. Retrieved July 21, 2004, from: http://www.hpts.co.kr/rexroth/RE29061.PDF
- Mannesmann Rexroth. Product description and commissioning. Instructions for VRPD digital amplifiers for proportional valves with electrical feedback. Type VT-VRPD-1, Series 1X. Type VT-VRPD-2, Series 1X. 2003. Retrieved December 19, 2005, from: http://www.boschrexroth.com/business_units/bri/en/products/p_pages/06_elektronik/01_verstaerkerkarten_module/01_analoge_verst_eu/index.jsp [see Further Information RE 301125].
- Mannesmann Rexroth. PC-Programm BODIV for digital amplifier cards. RE 29899/07.00. 2000. Retrieved December 19, 2005, from: http://www.boschrexroth.com/business_units/bri/en/products/p_specials/i_hacd/i_ bodiv/index.jsp [see BODIV download].
- Tektronix. Tektronix digital phosphor oscilloscopes 2004. Retrieved December 19, 2005, from: http://www.tequipment.net/TektronixTDS3014B.asp
- Reinert D, Schaefer M. Certification of highly complex safety-related systems. International Journal of Occupational Safety and Ergonomics (JOSE) 1999;5(4):537–52.
- Klug J, Schaefer M. Fehlererkennende Maßnahmen in Mikroprozessoren. Sicher-heitstechnisches Informations-und Arbeits-blatt 330 225. In: Berufsgenossenschaft-liches Institut für Arbeitsschutz (BGIA). BGIA-Handbuch Sicherheit und Gesund-heitsschutz am Arbeitsplatz [loose-leaf edition]. 2nd ed. Berlin, Germany: Erich Schmidt Verlag; 2003. p. 1–9.
- Berufsgenossenschaftliches Institut für Arbeitsschutz (BIA). Empfehlungen für die Prüfung von kontaktbehaftet abgeschalteten elektro-hydraulischen Stetig-Wegeventilen für sicherheitsbezogene Teile von Steuerungen (Report PE-BIA-M01). Sankt Augustin, Germany: BIA; 2000. In German.