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| Issue 1297-1 |
| US 6,925,419 B2 |
| Intrinsically safe field maintenance tool with removable battery pack |
| Joachim Düren, Köln (Germany); Günter Kämper, Castrop-Rauxel (Germany); and Brad N. Mathiowetz, Lakeville, Minn. (US) |
| Assigned to Fisher-Rosemount Systems, Inc., Austin, Tex. (US); and R. Stahl Schaltgerate GmbH, Waldenberg (Germany) |
| Filed on May 16, 2003, as Appl. No. 10/440,048. |
| Prior Publication US 2004/0230401 A1, Nov. 18, 2004 |
| Int. Cl.7G06F 11/30 |
| U.S. Cl. 702—184 [702/6; 702/183; 702/188] | 17 Claims |
| 1. An intrinsically safe field maintenance tool comprising:
terminals selectably coupleable to a process communication loop having a process industry standard communication protocol;
a first media access unit coupled to the terminals, wherein the first media access unit is configured to communicate in accordance
with a first process industry standard communication protocol;
a second media access unit coupled to the terminals, the second media access unit configured to communicate in accordance
with a second process industry standard communication protocol
a processor coupled to the first media access unit and the second media access unit;
a keypad coupled to the processor to receive user input;
a display coupled to the processor to display data; and
a battery pack connector adapted to removeably couple to a removable battery pack and provide power to circuitry in the intrinsically
safe field maintenance tool and provide power to circuitry in the intrinsically safe field maintenance tool.
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