SFD1 and SFD2 from STAHL CraneSystems, one of the market leaders for crane and hoist technology, are innovative and versatile frequency inverters for travel drives. Installation, parametrisation and operation are simple, ......SFD1 and SFD2 from STAHL CraneSystems, one of the market leaders for crane and hoist technology, are innovative and versatile frequency inverters for travel drives. Installation, parametrisation and operation are simple, the technology is future-orientated and the increased safety in overhead material transport compelling. The SFD1 and SFD2 frequency inverters from STAHL CraneSystems have been developed in collaboration with experienced suppliers - a twofold guarantee for world-wide service and speedy supply of original parts.Individual U/f characteristic frequency control, speed range up to 1:30 analog load sensor makes load-dependent travel possible motor potentiometer function as standard Flexible up to 4 parameter sets can be selected by means of external elements can be operated by external SPC integrated motor temperature control (ptc) parametrisable relays for signalling operating status analog output for process values parametrisation via operating panel or PC software (RS232-485) diagnosis during operation Safe protected against earth faults, overcurrent, overload, overvoltage and undervoltage integrated brake chopper and compact brake resistance vibration-resistant thanks to encapsulated modules Universal available for Ex Zone 22 as an option operation with 42/48/110/120/230 VAC control voltage IP 66 protection operating temperature range SFD1-20°C up to +50°C SFD2-10°C up to +40°C