MILWAUKEE, April 14, 2005 — Customers seeking increased component-level control and functionality in a variety of applications can use the new Allen-Bradley SensEject key-operated selector switch from Rockwell Automation. As the newest addition to the expanding Allen-Bradley 800F IEC push button product line, SensEject detects the presence or absence of a key in control equipment and automatically ejects the key, which prevents inadvertent or unauthorized operation. “SensEject allows a user to work on individual sections, or specific equipment within a process or production line, without shutting down the entire process,” said Mark Davidsz, engineering team leader, Rockwell Automation. “In applications where downtime means lost revenue, this is an important breakthrough.”
When operators insert the key into a SensEject switch, it activates a dedicated, key-sensing contact block that can signal alarms or annunciators and detect when a machine operator overrides an interlock. Signals can be sent to a centralized control and monitoring system indicating that a specific machine is being worked on and for how long. This information is relayed through a contact closure and opening. Enhancements to the original switch technology give SensEject expanded application flexibility. Rotation of a key into a control position can be similar to a standard selector switch, but subsequent rotation back into the original position causes the key to eject and the contact block to deactivate.
This function adds increased control and safety to the system by preventing keys from being accidentally left in the lock, which helps prevent inadvertent or unauthorized operation. Another enhancement prevents key retention in momentary positions, always ejecting the key unless it’s physically held in position. This requires a person to keep one hand on the key at all times, ensuring proper use monitoring. The SensEject key-operated selector switch addresses ISO 12648 and ISO 12649 standards, specific to the printing press industry and can be used for any production process where machine downtime or monitoring and control of machines is important.
Rockwell Automation (NYSE: ROK) is a leading global provider of automation, power, control, and information solutions that help manufacturers achieve a competitive advantage in their businesses.
Headquartered in Milwaukee, Wis., USA, the company employs about 20,000 people serving customers in more than 80 countries.For more information on the Allen-Bradley SensEject, please contact the Rockwell Automation Response Center, 10701 Hampshire Avenue South, Bloomington, Minn., 55438, 800.223.5354, Ext. 1796.Visit their website at www.rockwellautomation.com .
