• Control for air damper applications with up to 85 sq ft assuming 3.5 in-lb per sq ft of damper area, velocity independent.
• Patented self-centering shaft adapter.
• Access cover to facilitate connectivity.
• Declutch for manual adjustment.
• Mechanical end limits.
• Field-installable auxiliary switches.
• Rotation direction selectable by switch.
• Mountable in any orientation (no IP54 if upside down).
• Mechanical position indicator.
• CE approved. UL approved.300 lb-in Non-Spring Return Direct Coupled Actuator, (0)2-10 Vdc, (0)4-20mA| Input Impedance | 100K ohm (voltage), 500 ohm (current) |
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| Rotation to Open | By switch |
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| Overview | The MN7234 is a 300 lb-in (34Nm), non-spring return, direct-coupled, low voltage actuator that accepts adjustable modulating (0/2-10 Vdc) control for: air dampers, air handling units, ventilation flaps, louvers, and ball valves. |
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| Torque/Force (lb-in., lbf) | 300 lb-in. |
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| Feedback | (0)2-10 Vdc (max. output: ±1.0 mA) |
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| Torque/Force (Nm, N) | 34 Nm |
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| Supply Voltage | 24 Vac ±20%, 24 Vdc |
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| Fail Safe Mode | Non-Spring Return |
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| Number of Internal Auxiliary Switch | 0 |
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| Control Signal | (0)2-10 Vdc (4-20 mA w/500 ohm resistor) |
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| Shaft Adapter Type | Self-centering clamping |
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| Manual operation | Declutch mechanism |
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| Maximum Stall Torque/Force (lb-in., lbf) | 354 lb-in. |
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| Maximum Stall Torque/Force (Nm, N) | 40 Nm |
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| Rotational Stroke | 95 ±3 degrees |
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| Timing, Nominal Driving @ 60 Hz (sec) | 95 sec |
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| Compatible Damper Shafts (in.) | 3/8 to 1.06 in. round or 3/8 to 11/16 in. square |
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| Compatible Damper Shafts (mm) | 10 to 27 mm round or 10 to 18 mm square |
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| Materials | Plenum rated plastic housing |
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| External Auxiliary Switches Available | Yes, SW2-US |
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| Power Consumption (Driving) | 8 VA, 6 W |
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| Dimensions (in.) | 8.78 in high x 3.62 in wide x 3.15 in deep |
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| Electrical Connections | Enclosed screw terminal strip (22 to 14 AWG) |
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| Temperature Range, Ambient (F) | -5 F to +140 F |
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| Dimensions (mm) | 223 mm high x 92 mm wide x 80 mm deep |
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| Temperature Range, Ambient (C) | -20 C to +60 C |
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| Temperature Range, Storage (F) | -40 F to +175 F |
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| Temperature Range, Storage (C) | -40 C to +80 C |
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| Maximum Noise Rating, Driving (dB(A) @ 1m) | 40 |
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| Environmental Rating | NEMA2 |
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| Approvals, Canadian Underwriters Laboratories | cUL C22.2 No. 24-93 |
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| Approvals, CE | 89/336/ECC, 73/23/EEC |
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| Operating Humidity Range (% RH) | 5 to 95% RH, non-condensing |
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| Approvals, Underwriters Laboratories Inc | UL873, Plenum Rated |
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| Includes | Mounting bracket, self-centering shaft adapter |
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| Comments | Integral 1/2 in. NPSM conduit connection. |
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Product Family
Cross Reference
| Honeywell, Inc. | MN7234A2008 |
| Control Signal | 2-10 VDC, 4-20 mA |
| Power | 24 |
| Torque (in-lb) | 300 |
| Feedback | 2-10 VDC |
| Timing (Seconds) | 90 |
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| Belimo Aircontrols (USA), Inc. | GMB24-SR |
| Belimo Control Signal | 2-10 VDC, 4-20 mA |
| Belimo Power (24V actuators are AC/DC) | 24 |
| Belimo Torque | 360 |
| Belimo Feedback | 2-10 VDC |
| Belimo Timing | 150 |
| Return Type | Non Spring Return |
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| Above replacements may require additional mounting accessories. Manufacturer Suggested Replacement |
| Honeywell, Inc. | MN7234A2008 |
| Control Signal | 2-10 VDC, 4-20 mA |
| Power | 24 |
| Torque (in-lb) | 300 |
| Feedback | 2-10 VDC |
| Timing (Seconds) | 90 |
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| Belimo Aircontrols (USA), Inc. | GMB24-SR |
| Belimo Control Signal | 2-10 VDC, 4-20 mA |
| Belimo Power (24V actuators are AC/DC) | 24 |
| Belimo Torque | 360 |
| Belimo Feedback | 2-10 VDC |
| Belimo Timing | 150 |
| Return Type | Non Spring Return |
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| Above replacements may require additional mounting accessories. Manufacturer Suggested Replacement |
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