Description
The Honeywell M4185B1009 is a Modutrol IV spring return motor engineered for two-position control of dampers and valves in HVAC systems. It operates on 120V AC at 50/60 Hz, provides 60 lb-in torque, and features an adjustable stroke from 90° to 160°, delivering durable, precise control performance with a built-in transformer and one auxiliary switch.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Honeywell |
| Category |
HVAC Actuators |
| Part Number |
M4185B1009 |
| Subcategory |
Modutrol IV Motor |
| Series |
41 Series |
| Power Supply |
120V AC, 50/60 Hz |
| Power Consumption |
20 VA |
| Control Type |
Two-position, SPST |
| Fail-Safe Mode |
Spring return to normal position on power loss |
| Torque Output |
60 lb-in |
| Stroke Adjustment |
Field adjustable 90°–160° (asymmetrical) |
| Timing |
30–60 seconds nominal |
| Shaft Configuration |
Dual-ended, slotted and tapped both ends |
| Shaft Dimensions |
0.375 in square |
| Mounting Type |
Foot-mounted |
| Auxiliary Switch |
1 factory-installed SPDT switch |
| Switch Ratings |
7.2A @ 120V, 3.6A @ 240V (AFL); 43.2A @ 120V, 21.6A @ 240V (ALR) |
| Rotation Direction |
Clockwise on signal increase (normally closed) |
| Electrical Connections |
Quick-connect terminals |
| Temperature Range |
-40°F to 150°F (-40°C to 65°C) |
| Enclosure Protection |
NEMA 3 (upright mounting) |
| Deadweight Load (Shaft) |
200 lbs each end; 300 lbs combined |
| Construction |
Rolled steel frame with aluminum flange |
| Dimensions |
6-7/16" H × 5-1/2" W × 8-3/4" D |
| Weight |
9.00 lbs |
Information About M4185B1009
The M4185B1009 is part of Honeywell’s Modutrol IV Series, a robust line of industrial and HVAC control motors built for precise, long-lasting performance. This model provides spring-return operation, ensuring automatic repositioning to normal state upon power interruption for fail-safe reliability. It includes a built-in transformer, dual-ended shaft, and one auxiliary switch for enhanced versatility. The adjustable stroke feature (90° to 160°) allows for customized control settings, while its 60 lb-in torque rating and 20 VA drive power make it suitable for a wide range of damper and valve control applications. Designed with a rugged steel housing and weather-protected junction box, it withstands harsh environmental conditions and continuous operation demands.
Key Features
- Spring Return Function: Returns the motor to its normal position automatically during power loss, ensuring system safety.
- High Torque Output: Provides 60 lb-in of torque for reliable control of dampers and valves under heavy loads.
- Adjustable Stroke Range: Field-adjustable from 90° to 160° for flexible operation in various system configurations.
- Dual-Ended Shaft Design: Enables operation of valve linkages from either end for normally open or normally closed configurations.
- Integrated Transformer: Simplifies installation by providing built-in power conversion for Modutrol IV control circuitry.
- Durable Construction: Features a rolled steel frame and aluminum flange for extended service life in industrial environments.
- Auxiliary Switch Included: One factory-mounted SPDT switch allows additional control or feedback circuit integration.
- Weather Protection: NEMA 3-rated junction box (upright mount) ensures protection against dust and moisture.
The M4185B1009 delivers the reliability and precision required for HVAC control applications, offering smooth actuation, configurable performance, and long-term operational durability.
