October 29, 2003—Siemens Building Technologies has introduced a new electronic bypass option for the SED2 family of variable frequency drives (VFDs). The SED2 VFD Electronic Bypass improves system reliability, streamlines installation, simplifies control devices, eliminates many conventional mechanical components and reduces wiring, says Siemens.
SED2 VFDs are used in HVAC variable torque applications for fans, motors, blowers, and pumps in air handling units, chillers, condenser pumps, chilled water pumps, and cooling towers applications.
The SED2 VFD Electronic Bypass includes such features as: 6 relay outputs, multiple inputs, 2 safety inputs, remote start, interlock and essential service, and more. It offers a touch-sensitive electronic keypad for simplified operator monitoring and diagnostics. The Electronic Bypass option package is integrated with the SED2 VFD as a complete system, with all components packaged and pre-wired for quick installation and start-up. For more information, visit Siemens.
