Rockwell Automation introduces the Allen-Bradley Bulletin 842D 26 bit absolute multiturn shaft encoder. This device offers direct connection to DeviceNet for advanced functionality with reduced wiring cost.
The network capability of the new Bulletin 842D encoders eliminates the need for dedicated input cards and allows connection to the DeviceNet trunk line via a low-cost five-pin micro-quick disconnect. Up to 63 842D DeviceNet encoders can be interfaced to a PLC or other logic system through a single network connection.
Providing up to 8192 counts-per-revolution (CPR) over a maximum of 8192 turns, the 842D also incorporates advanced diagnostics and many programmable options.
More features of the 842D encoders
* Eight programmable limit switch or cam functions that set a bit when the position is within one of eight value ranges.
* Programmable code direction (CW or CCW position increment).
* Offset value, enabling the user to reset the output in relation to the machine's mechanical position.
* Output-scaling, which lets you set the optimal counts-per-revolution for a particular application.
* Rugged magnetic technology allows high shock loading (100 g for 6 ms) and vibration (20 g at 10 to 2000 Hz).
* High temperature (100°C operating) and high humidity (98%) operation.
* Multiturn counting is accomplished through gearing and magnets.
* Absolute position is saved on power failure without any battery back-up.
With these features the encoders are an appropriate choice for applications in steel mills, overhead cranes, punch presses, transfer lines, oil rigs, windmills, machine tools and packaging.
Rockwell Automation, a business of Rockwell International Corporation (NYSE: ROK), brings together leading brands in industrial automation, including Allen-Bradley controls, Reliance Electric power transmission products, Dodge mechanical power transmission components, and Rockwell Software.
Rockwell Automation's Complete Automation strategy of helping customers achieve a competitive advantage is supported by thousands of authorised partners, distributors and system integrators around the world.
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