EA170-24100 Danaher
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The Danaher EA170-24100 is a Snaplock Limit Switch with a DPDT pole throw and a Form Z contact form. This switch uses silver alloy contacts and has two normally open and two normally closed contacts. Featuring a recommended travel of 7 degrees, it supports wide mounting and is housed in a NEMA 1, 4, and 13 enclosure.
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Product Description:
The EA170-24100 is a cam-actuated limit switch produced by Danaher within the Snaplock Limit Switches series. It mounts on a rotating shaft and converts a preset angular displacement into a discrete on-off signal that can halt motion, sequence equipment, or confirm position in automated production lines. A clockwise operating direction drives the internal snap mechanism, and the housing’s wide mounting pattern allows the device to be secured directly to machine frames without adapters.
The actuating cam works within a total sweep of 36°, providing ample angular range for timing adjustments. The switch trips after only 6°30′ of rotation, so the contacts change state early in the travel, while the reset is completed when the shaft returns through 4°. Danaher recommends steady-state operation at approximately 7° of travel; staying near this point minimizes overtravel and extends contact life. The spring assembly requires 32 in-lb of torque to move the switch through its snap action, making it suitable for small cams or lever arms. The lever orientation can be adjusted in 7°30′ increments across a 167° range. This adjustment allows the actuation point to be positioned according to the timing requirements of the machine cycle.
The enclosure carries NEMA Type 1, 4, and 13 ratings, providing protection against dust, splashing water, and oil drips commonly found in industrial production areas. Internally, the switching element uses a Form Z configuration, which provides simultaneous make-before-break contact behavior. A double-pole, double-throw contact arrangement delivers two isolated circuits that change together, and the device includes two normally closed contact paths in addition to two normally open paths. Silver-alloy contact tips improve conductivity and resist arc erosion during repeated cycling, while the short-travel mechanism reduces mechanical wear during frequent operation.
