Honeywell Modutrol IV Series 61 rotary actuators are spring-return, floating-control motors that offer precise proportional positioning for dampers and valves. Operating on 24 VAC, these units include adjustable stroke, quick-connect terminals, dual shafts, and optional feedback potentiometers—ideal for HVAC zone control, burner modulation, and industrial valve automation.
Honeywell Modutrol IV Series 61 (and Series 62 with feedback) floating spring-return actuators provide dependable open-hold-close positioning for air handling dampers, industrial burners, and control valve assemblies. Because choosing the right replacement requires matching operating voltage (24VAC vs. 120VAC), torque output (35 to 300 lb‑in), spring-return fail-safe orientation, and internal feedback potentiometer resistance (Series 62 slaving), verifying technical parameters is essential. Contact our technical sourcing team today to locate your exact replacement or cross-reference legacy models.
Honeywell Series 61 and 62 motors feature NEMA 3 die-cast aluminum enclosures, oil-immersed gear trains, and mechanical spring-return mechanisms designed for floating 3-wire control loops. Use this matrix to compare voltage inputs, torque ratings, and position feedback options.
| Actuator Class | Control & Feedback Logic | Common Series |
|---|---|---|
| Series 61 (Floating Control) | 24VAC or 120VAC 3-wire SPDT floating (open-hold-close) control with mechanical spring-return fail-safe action for air handlers and dampers. | M6184A1019, M6185A1002 |
| Series 62 (With Feedback) | Includes an internal 135 Ω feedback potentiometer for position indication, slaving secondary motors, or interfacing with BMS controllers. | M6284A1055, M6285A1005 |
| High-Torque Fail-Safe Series | Heavy-duty 150 lb‑in and 300 lb‑in floating spring-return motors engineered for large multi-blade dampers and industrial burner valve trains. | M6194A1002, M6294A1010 |
3-Wire Floating Spring-Return Damper Package
Feedback-Equipped Burner & Valve Drive Assembly
Control Signal & Feedback Potentiometer Alert: Series 61 actuators require floating 3-wire SPDT (open-hold-close) signal logic. When replacing or slaving Series 62 units equipped with feedback potentiometers, verify potentiometer resistance (typically 135 Ω) and drive rotation before wiring to prevent controller feedback errors or motor stalling.
Honeywell Series 61 and 62 Modutrol IV motors provide precise 3-wire floating control without requiring complex electronic signal conditioning cards. Their open-hold-close stepping action allows triac or relay outputs to reposition dampers or valves incrementally with zero drift.
By selecting Series 62 models equipped with integral 135 Ω feedback potentiometers, system integrators can easily cascade multiple actuators (slaving secondary motors to a master unit) or send real-time shaft position feedback to centralized Building Management Systems (BMS).
Unsure of your control signal, torque rating, or feedback specs?
Take a snapshot of your existing motor nameplate, damper linkage footprint, or control schematic, and our technical sales team will verify the exact replacement.
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