STEINEL MD-24 ECO COM1 UP concealed-wiring ceiling motion detector, PIR, 360°, tangential coverage up to Ø24 m, IP20, white — 087784
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Item specifics
- Housing material Plastic
- Weight 169 g net
- Number of detection zones 1436 switching zones
- Sensor technology Passive infrared (PIR); mixed-light measurement
- Sensor type Motion detector
- Installation Concealed wiring on indoor ceiling; load module secured to mounting box
- Reach Nominal tangential Ø24 m; manual at 2.5 m height: tangential Ø24.5 m, radial Ø5.5 m; MD motion detection, no PD presence-zone rating
- Detection angle 360°
- Optimal mounting height 2.8 m
- Maximum mounting height 4 m per manual; mounting range 2.5–4 m; current MD-24 table 10 m, narrative and manual 4 m
- Time setting 5 s–60 min
- Twilight setting 2–1000 lx; Teach-IN and daytime mode
- Segment masking Supplied adjustable lens shroud; cut to suit required segments
- Manual control Push-button input; button cable <50 m; manual light ON for up to 4 h
- Watt-o-matic No; COM1 ON/OFF switching
- Soft light start No; COM1 relay version
- Relay load Incandescent/halogen 2000 W; low-voltage halogen 2000 VA
- LED load (W) LED/electronic ballasts: up to 500 W, max. 50 units, total C<176 µF
- Parallel connection Wired via L′; master/master, up to 10 sensors
- Output type One ON/OFF switched-live relay; not a potential-free contact
- Interface & control COM1 relay; push-button input; fully or semi-automatic mode
- Settings Potentiometers; optional RC8 or Smart Remote remote; test mode
- Voltage 220–240 V AC, 50/60 Hz
- Operating temperature −20…+50 °C
- IP rating IP20; intended for indoors
- Dimensions (W×H×D) Ø109 × 75 mm per drawing and manual; current article table gives Ø109 × 74 mm
- Accessories Optional RC5 (592806), RC8 (559410), Smart Remote (009151)
- Warranty 5 years
- Colour / RAL White
- In the box Detector in selected mounting version, lens shroud, safety information and quick-start guide; remote not included
- Manufacturer SKU 087784
- EAN 4007841087784
- Standby power consumption (W) <0.1 W
Product Description
Motion sensing for ceiling lighting control
STEINEL MD-24 ECO COM1 UP is a white concealed-wiring ceiling motion detector combining passive infrared sensing with ambient-light measurement. The manufacturer article is 087784. It automatically controls a separately connected lighting circuit, for example in a circulation area, ancillary room or office entrance. Its job is to respond to movement and the selected light threshold. This is an MD motion detector; the additional presence sensitivity and presence-zone ratings of ECO PD models do not apply to this listing.
360° sensing covers the space surrounding the mounting point. The nominal tangential zone is Ø24 m, while the manual gives Ø24.5 m tangential and Ø5.5 m radial coverage at a height of 2.5 m. Tangential movement crosses the detection sectors; radial movement approaches the sensor. These figures are diameters, rather than radii, and do not imply identical sensitivity in every direction. Choose the sensor position with normal walking routes, doors and unobstructed sight lines in mind so that the coverage is useful in the room.
PIR technology responds to changes in heat radiation from moving objects. Walls, glass and other obstructions restrict its view, so it should not be selected for sensing through partitions. The supplied adjustable lens shroud can block unwanted sectors, such as an adjacent route. Adapt the shroud segments to the required coverage as described in the instructions. Test mode and the detector indication help confirm the actual response after installation. A fresh coverage check is also useful when furniture or normal walking routes are changed later.
Timing and ambient-light threshold
The stay-on time is adjustable from 5 seconds to 60 minutes. A shorter delay can suit a passage, whereas a longer setting gives someone time after entering an ancillary area. After the last detected movement, the detector waits for the selected delay and switches the load off. A 2–1000 lx twilight threshold adapts switching to existing daylight. Teach-IN stores the measured local light level after ten seconds, with the load off during measurement. Daytime mode allows movement to switch the lights regardless of the ambient brightness.
In fully automatic mode, the sensor and its settings determine when lighting switches on and off. In semi-automatic mode, a separately connected push-button is used to request lighting, while switching off remains automatic. This is useful when occupants should decide whether they need artificial light. The button input also supports manual switching on and off and a four-hour continuous-on override. The push-button cable must be shorter than 50 m. The manufacturer's instructions explain the operating sequence and how to return to ordinary automatic or semi-automatic operation.
Potentiometers provide basic adjustment. RC8 and Smart Remote are optional remote controls, while RC5 offers user-control functions. Smart Remote makes phone or tablet app configuration possible using a separate accessory. The Bluetooth link in that arrangement belongs to Smart Remote; it does not mean this detector has built-in Bluetooth or Mesh networking. No remote is included. This distinction helps select an appropriate configuration method when the sensor will be positioned somewhere that is inconvenient to reach for routine adjustment.
One relay circuit and load selection
COM1 has one ON/OFF relay output with switched live, rather than a potential-free contact. The detector uses a 220–240 V AC supply. Compatible detectors can be joined by a wired parallel connection via L′, with a maximum of ten devices. For LED and electronic-ballast loads, the 500 W limit, maximum of 50 units and total capacitance below 176 µF all apply simultaneously. Total wattage alone is insufficient to establish compatibility; all these limits need to be considered together when choosing lighting and control gear. The COM1 version does not provide brightness dimming.
UP installation with concealed wiring
For the UP version, the load module is screwed to a mounting box before the magnetic sensor module is attached. It is the concealed-wiring ceiling version, rather than the DE spring assembly for a cutout. For installation planning we use Ø109 × 75 mm from the dedicated drawing and shared manual; the current article table gives 74 mm depth, a one-millimetre difference between documents. The dimensions describe the complete unit, rather than just the visible ceiling projection. IP20 protection is intended for indoor use; IP54 belongs to the separate AP mounting version.
The manual specifies a 2.5–4 m mounting range and 2.8 m optimum height. The current MD-24 table also gives a maximum height of 10 m, but the same article narrative and shared manual state 4 m. This listing therefore uses the conservative 4 m manual limit. The wiring diagram and manufacturer documents help match the chosen installation to the lighting circuit. After installation, check all required coverage in the actual room layout.
About the gallery images
The main photograph shows the exact white MD-24 ECO COM1 UP version. The magnetic-installation photograph shows an ECO-family UP concealed-wiring assembly; its exact article cannot be identified. The rear product photograph shows this model’s connection construction. The hand, room, mounting box or other installation equipment pictured does not establish package contents and is not additionally included. The dimension drawings and electrical principle diagrams are technical illustrations.
