Description
The Johnson Controls M9208-BDA-3 is a direct-mount electric spring-return damper actuator - 70 lb·in (8 N·m), AC 230 V line voltage, on/off (two-position) control, with integral conduit connectors and no auxiliary switches. This is the 230 volt model. Johnson Controls states it directly: "Three different voltage ratings are available for On/Off Actuators. M9208-BGx-3: AC 24 V 50/60 Hz or DC 24 V power. M9208-BAx-3: AC 120 V 50/60 Hz power. M9208-BDx-3: AC 230 V 50/60 Hz power. The M9208-BAx-3 and M9208-BDx-3 actuators are double-insulated so an electrical ground is not required." Published specification: * Rated torque: 70 lb·in (8 N·m), running and spring returning, at all operating temperatures * Control: On/off (two-position) * Supply: AC 230 V (AC 198 V to 264 V) at 50/60 Hz * Current draw: 0.04 A running, 0.03 A holding * Runtime, power on: 55 to 71 seconds for 90° * Spring return time: 13 to 26 seconds at room temperature; 21 seconds nominal at full rated load; 39 seconds maximum at -4°F (-20°C); 108 seconds maximum with 53 lb·in load at -40°F (-40°C) * Rotation range: 95° maximum full stroke; adjustable stop 35° to 95° * Shaft: 5/16 to 5/8 in. (8 to 16 mm) diameter with the standard universal clamp * Electrical connection: integral connectors for 3/8 in. (10 mm) flexible metal conduit (FMC), with 48 in. (1.2 m) cable * Insulation: double-insulated - no electrical ground required * Life cycles: 60,000 full-stroke cycles at 70 lb·in * Audible noise: <47 dBA running, <20 dBA holding, <52 dBA spring returning, at 1 m * Auxiliary switches: none - see the M9208-BDC-3 Check the second letter before you order, wire or substitute. This one is 230 V. * M9208-BGA-3 - AC 24 V or DC 24 V * M9208-BAA-3 - AC 120 V * M9208-BDA-3 - AC 230 V (this item) All three are 70 lb·in, on/off, spring return, conduit-connected, and physically indistinguishable. D is the one people get wrong, because G reads as "general" and A as "AC", while D suggests nothing at all - and a code that gives no hint is a code people assume. Assume wrong and you either destroy a 24 V actuator, fail to move a 230 V one from a 120 V circuit, or put 230 V onto terminals someone believed were Class 2. Read the middle letter every time. The 230 V range is wide: AC 198 V to 264 V, 50 or 60 Hz. That covers nominal 208 V, 220 V, 230 V and 240 V supplies on either frequency, which makes this the model for 230 V sites and for export or non-North-American installations. At 0.04 A running it is the lowest-draw actuator in the range. Double-insulated - no ground required. Johnson Controls states this for the 120 V and 230 V models specifically. It does not apply to the 24 V BGx. No control transformer needed. Wire it straight to the 230 V circuit that switches it. Two-position only. Powered open, spring closed. There is no floating-point input and no analogue input - and note Johnson Controls offers line voltage on the on/off models only. The floating and proportional M9208 models are 24 V, so a 230 V site needing modulating control will also need a transformer. Faster, and louder, than the modulating models. At 55 to 71 seconds the on/off M9208 actuators stroke roughly twice as fast as the 150-second versions, but run at <47 dBA against <35 dBA - the Bxx models use a DC brush motor controlled by analog electronics. Spring return means fail-safe. Full 70 lb·in is rated with and without power applied, so the spring closes the damper against its seal in 13 to 26 seconds at room temperature. Direction is set by mounting: face A away from the damper gives counterclockwise spring return; face B away gives clockwise. Cold weather note. Spring return stretches from 21 seconds nominal to 39 seconds at -4°F (-20°C), and Johnson Controls quotes 108 seconds maximum against a reduced 53 lb·in load at -40°F (-40°C). Check that against any proof-of-closed window in your sequence. Bigger shafts: to 3/4 in. (19 mm) with the M9208-600 large shaft coupler kit. * Brand / Manufacturer: Johnson Controls * Model / Part Number: M9208-BDA-3 * Series: M9208 Series electric spring-return actuators * Torque: 70 lb·in (8 N·m) * Control: On/off (two-position) * Supply: AC 230 V (198 to 264 V), 50/60 Hz - line voltage * Current: 0.04 A running, 0.03 A holding * Runtime: 55 to 71 seconds * Connection: Integral 3/8 in. (10 mm) FMC conduit connectors * Auxiliary switches: None - see the M9208-BDC-3 * Spring return: Yes - fail-safe * Condition: New We stock the M9203, M9206, M9208 and M9220 spring-return ranges from 27 to 177 lb·in, in 24 V, 120 V and 230 V. Tell us the supply voltage on your circuit and we will match it.
Johnson Controls / Johnson Controls
M9208-BDA-3 / M9208BDA3
M9208-BDA-3 / M9208BDA3
Warranty Information
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