Description
Honeywell M4185B1009 Modutrol IV Motor
120V with Internal Auxiliary Switch and Transformer
The Honeywell M4185B1009 Modutrol IV motor is a reliable, spring-return actuator designed for precise two-position control of dampers and valves. It is part of the Series 41 and 81 lineup, ideal for applications requiring the controlled element to return to its normal position upon power loss.
Features
-
Fixed torque throughout the entire voltage range for consistent performance.
-
Integral spring return automatically returns the motor to its starting position if power is interrupted.
-
Built-in junction box offers NEMA 3 weather protection when mounted upright.
-
Operates on 24 Vac power with quick-connect terminals standard (screw terminal adapter available).
-
Field-adjustable stroke from 90° to 160° for flexible control.
-
Suitable for normally open or normally closed valves and dampers.
-
Integral auxiliary switch factory mounted; additional switches can be field added.
-
Dual shafts (slotted and tapped on both ends) allow valve linkage operation from power or auxiliary end.
-
Adapter bracket available for matching shaft height of older motor models.
Specifications
| Specification | Details |
|---|---|
| Application Type | Electric |
| Fail Safe Mode | Spring Return |
| Control Signal | Two-position, SPST |
| Internal Auxiliary Switch | 1 |
| Motor Shaft | Dual-ended, square, 0.375 in. |
| Stroke | Adjustable 90° to 160°, asymmetrical |
| Torque Rating | 60 lb-in |
| Frequency | 50 Hz / 60 Hz |
| Power Consumption | 20 VA |
| Electrical Connections | Quick-connect terminals |
| Mounting | Foot-mounted |
| Dimensions (H x W x D) | 6 7/16" x 5 1/2" x 8 3/4" |
| Temperature Range | -40°F to 150°F |
| Deadweight Load on Shaft | 200 lbs (either end), 300 lbs combined |
| Nominal Timing | 30 to 60 seconds |
| Shaft Rotation (Control Increase) | Clockwise (from power end, normally closed) |
| Auxiliary Switch Ratings | AFL: 7.2A @ 120 Vac, 3.6A @ 240 Vac ALR: 43.2A @ 120 Vac, 21.6A @ 240 Vac |
| Voltage | 120 V |
Summary
The Honeywell M4185B1009 Modutrol IV Motor offers dependable, precise two-position damper and valve control with a fail-safe spring return feature. Its rugged design, adjustable stroke, and built-in auxiliary switch make it ideal for commercial HVAC and industrial applications where reliability and safety are critical.
