The ES177C2(-S) Series Floating Actuators are direct-mount, spring return electric actuators that operate on AC/DC 24 V power. These bidirectional actuators do not require a damper linkage and are easily installed on dampers with 1/2 to 3/4 in. or 12 to 19 mm round shafts, or 3/8 and 1/2 in. or 10, 12, and 14 mm square shafts using the standard shaft clamp included with the actuator. An optional M9220-600 Jackshaft Coupler Kit is available for 3/4 to 1-1/16 in. or 19 to 27 mm round shafts, or 5/8 and 3/4 in. or 16, 18, and 19 mm square shafts.

A single ES177C2(-S) Series Floating Electric Spring Return Actuator provides a running and spring return torque of 177 lb·in (20 N·m). Two or three like models mounted in tandem using the M9000-158 Tandem Mounting Kit deliver twice or triple the torque (354 lb·in [40 N·m] or 531 lb·in [60 N·m]). Integral line voltage auxiliary switches are available on the ES177C2-S models to indicate end-stop position or to perform switching functions within the selected rotation range.

The ES177C2(-S) Series Floating Electric Spring Return Actuators mount directly to the surface in any convenient orientation using two M3 x 9.5 mm self-drilling sheet metal screws and the anti-rotation bracket (parts included with the actuator). No additional linkages or couplers are required. Electrical connections are color-coded and identified with numbers permanently marked on the actuator cable. A tag on the actuator cable identifies the electrical connections, and wiring details are also included on the actuator housing.

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