Name: MEAN WELL LCM-40KN series: KNX constant-current LED driver - LCM-40KN
Brand: MEAN WELL
SKU: LCM-40KN
Price: 124.69 USD
Availability: InStock

MEAN WELL LCM-40KN series: KNX constant-current LED driver - LCM-40KN

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Description

LCM-40KN KNX LED driver

MEAN WELL LCM-40KN is a 42 W multi-stage constant-current LED driver with KNX control, pushbutton dimming and six primary DIP current settings. Match the LED string to the selected current and voltage window; 700 mA is the factory default. This version has no auxiliary DC output.

Download MEAN WELL LCM-40KN Datasheet (PDF)Download MEAN WELL LCM-40/60 KNX Installation Manual

LCM catalog, PDF pages 45–53. Select the exact interface and AUX suffix when ordering.

Output and DIP settings

Output mode and rating	Constant-current output; rated power 42 W. The current and voltage limits below apply together; a family wattage does not authorize extra voltage or current.
Current accuracy and ripple	Current tolerance ±5%; maximum current ripple 5% at rated current. Ripple is measured at 50–100% of maximum output voltage and under rated power.
Current selection	DIP positions are listed as 1/2/3/4/5/6; ON and OFF refer to the marked switch positions. Select a current compatible with the LED module rating before energizing.
350 mA	LED operating window 2–100 V; maximum open-circuit voltage 110 V; DIP OFF/OFF/OFF/OFF/OFF/OFF.
500 mA	LED operating window 2–80 V; maximum open-circuit voltage 110 V; DIP ON/OFF/OFF/OFF/OFF/OFF.
600 mA	LED operating window 2–67 V; maximum open-circuit voltage 110 V; DIP ON/ON/OFF/OFF/OFF/OFF.
700 mA — default	LED operating window 2–57 V; maximum open-circuit voltage 65 V; DIP ON/ON/ON/OFF/OFF/ON.
900 mA	LED operating window 2–45 V; maximum open-circuit voltage 65 V; DIP ON/ON/ON/ON/OFF/ON.
1050 mA	LED operating window 2–40 V; maximum open-circuit voltage 65 V; DIP ON/ON/ON/ON/ON/ON.
Additional DIP settings	The following additional settings are given in the KN catalog. The connected LED forward voltage must be lower than the listed maximum. Keep the total output within the rated power; rounded table limits do not increase that rating.
450 mA — additional	Maximum LED voltage 78 V; DIP OFF/ON/OFF/OFF/OFF/OFF.
550 mA — additional	Maximum LED voltage 73 V; DIP OFF/OFF/OFF/ON/OFF/OFF.
650 mA — additional	Maximum LED voltage 62 V; DIP ON/OFF/OFF/OFF/ON/OFF.
750 mA — additional	Maximum LED voltage 53 V; DIP ON/ON/OFF/OFF/ON/ON.
800 mA — additional	Maximum LED voltage 50 V; DIP ON/ON/OFF/ON/OFF/ON.
850 mA — additional	Maximum LED voltage 47 V; DIP ON/ON/ON/OFF/ON/ON.
950 mA — additional	Maximum LED voltage 42 V; DIP ON/ON/OFF/ON/ON/ON.
Auxiliary output	No auxiliary DC output on this exact model; the separately specified AUX version is required for that function.
Standby power	<0.5 W, measured at 180–230 VAC; standard non-AUX configuration.

Input and electrical performance

Input voltage and frequency	180–295 VAC, 47–63 Hz; 220–392 VDC.
Power factor and harmonics	Built-in active PFC. Power factor ≥0.975 at 230 VAC and ≥0.95 at 277 VAC, full load. THD <20% at load ≥75%.
Typical efficiency	90% at 500 mA / 80 V.
Typical input current	0.23 A at 230 VAC (typical).
Setup time	500 ms at 230 VAC. Measured at first cold start; repeated ON/OFF operation can increase setup time.
Inrush and breaker loading	Cold-start inrush 20 A at 230 VAC, width 310 µs at 50% Ipeak, per NEMA 410. Catalog maximum on a 16 A breaker at 230 VAC: B type 21 units / C type 35 units; assess actual circuit conditions.
Leakage current	<0.5 mA at 240 VAC.
Input/load derating	At 60 Hz: 80% load at 180 VAC, increasing to 100% at 200 VAC; the plotted full-load region continues to 295 VAC.

Control and temperature compensation

KNX configuration	ETS configuration supports switching brightness/speed/delay and status, relative/absolute dimming, lamp-failure and AC/DC monitoring, power-on level, bus-failure/recovery behavior, linear/logarithmic dimming, two block functions, staircase with multi-stage timing, cyclic monitoring, 8 scenes, an operating-hours counter, five scheduled constant-light-output (CLO) divisions and power-consumption feedback. Set output current using the hardware DIP switches; these control functions do not replace current selection.
KNX bus and PUSH	Connect a suitable KNX bus to the KNX terminals. The KNX bus must remain connected when using PUSH dimming or AC/DC monitoring. For PUSH, connect the button between PUSH and AC/L; never connect that button to AC/N, which can cause a short circuit.
PUSH grouping	Maximum button-to-last-driver cable length: 20 m. Up to 10 drivers may be controlled by one local pushbutton. ETS may define separate independent groups; this does not increase the local PUSH wiring limit.
AC/DC monitoring mode	Use the dedicated monitoring diagram: PUSH and L connect to AC/L or backup DC+, while N connects to AC/N or DC−. This is the monitoring configuration, not the PUSH-button wiring configuration.
Synchronization	Up to 10 drivers (1 master + 9 slaves); the catalog shows a KN master with LCM-40/60 slave units. Sync dimming range 6–100%; minimum dimming depends on the database. Use a flat 22–24 AWG (0.2–0.3 mm²) cable shorter than 5 m and observe SYN polarity.
External NTC temperature compensation	An external NTC across +NTC/−NTC senses the luminaire or its environment. Without an NTC, current follows the selected DIP setting. Reference THINKING TTC03 series: 220 kΩ keeps 100% current below 60°C, 330 kΩ below 70°C, or 470 kΩ below 80°C; above the corresponding threshold current is reduced according to the catalog curve. MEAN WELL does not supply the NTC; verify other brands against the curve.
NTC/control interlock	KNX control, dimming and synchronization are invalid while NTC temperature compensation is in use.

Protection and operating conditions

Protection	Short circuit: constant-current limiting with automatic recovery after the fault is removed. Overvoltage: 110–130 V, shutdown; reapply power to recover. Overtemperature: shutdown; reapply power to recover.
Case temperature	Working case-temperature range −30 to +90°C; maximum Tcase +90°C. Case temperature is not ambient temperature.
Cooling/load derating	Free-air convection, horizontal mounting. The ambient-temperature plot labels 1050 mA as full load only through +40°C, where that curve ends. The curve labelled “Others” is 100% through +50°C, falling to 60% at +60°C. Follow the matching current-setting curve; do not extrapolate beyond its endpoint. The Tcase curve is 100% through +90°C.
Altitude derating	For fanless operation above 2,000 m, reduce allowable ambient temperature by 3.5°C for each additional 1,000 m.
Humidity and storage	Operating humidity: 20–90% RH, non-condensing. Storage: −40 to +80°C, 10–95% RH.
Temperature coefficient	±0.03%/°C from 0 to +50°C.
Vibration	10–500 Hz, 2 G, 10 minutes per cycle, 60 minutes each along X, Y and Z axes.

Safety and compliance

Construction and safety	Class II plastic enclosure; no FG connection; SELV. ENEC BS EN/EN 61347-1 and 61347-2-13; BS EN/EN 62384, independent controlgear; BIS IS 15885 (Part 2/Sec 13); EAC TP TC 004. GB/T 19510.1 and GB/T 19510.213 are by request. KNX/EIB certified.
Emergency-lighting scope	Emergency-lighting (EL) requirements: BS EN/EN 50172, BS EN/EN 60598-2-22 and BS EN/EN 61347-2-13 Appendix J, with AC input 200–240 VAC.
Insulation tests	I/P–O/P: 3.75 kVAC. I/P–O/P insulation resistance >100 MΩ at 500 VDC, 25°C / 70% RH.
EMC and system integration	BS EN/EN 55015; BS EN/EN 61000-3-2 Class C (load ≥40%); BS EN/EN 61000-3-3; GB/T 17743, GB/T 17625.1; EAC TP TC 020. Immunity: BS EN/EN 61000-4-2/-3/-4/-5/-6/-8/-11 and BS EN/EN 61547, light-industry level; line-to-line surge 2 kV. These are component results; reconfirm EMC in the final equipment.
ErP installation condition	For the catalog’s latest ErP lighting-fixture compliance condition, use the driver behind a switch rather than permanently connected to mains.

Installation and reference information

Dimensions and mounting	123.5 × 81.5 × 23 mm (L × W × H), tolerance ±1 mm. Use the mounting drawing: top-view Ø4.2 mm fixing holes on 110 × 68 mm centers; the side-view tabs are marked 2 × Ø4 mm. Maintain the stated horizontal cooling orientation.
Terminal assignment	TB1: 1 AC/L, 2 AC/N, 3 PUSH. TB4: 1 KNX−, 2 KNX+. TB5: 1 +V, 2 −V. TB3: 1 +FAN, 2 −FAN, 3 +NTC, 4 −NTC, 5 +SYN, 6 −SYN. The fan/auxiliary output is active only on the AUX version.
Installation	Disconnect power before wiring or changing DIP settings. Match LED polarity and the complete current/voltage/power envelope, and use the exact terminal diagram for this interface. Apply the installation instructions in the linked manual.
Per-unit weight reference	240 g (0.24 kg), the catalog PACKING reference per unit; not a shipment weight.
Reliability and warranty	MTBF 1764.6K / 190.4K hours, respectively Telcordia SR-332 / MIL-HDBK-217F at 25°C. Manufacturer catalog warranty: 3 years, subject to its terms.
Specification conditions	Unless otherwise stated, parameters are measured at 230 VAC input, rated current and 25°C ambient. Performance plots use Tcase 80°C; the plotted examples do not replace the model limits.

Manufacturer installation instructions

Installation and clearance	Install indoors by a qualified electrician. Keep at least 50 mm of ventilation clearance around the driver. Follow the dedicated installation manual and the model-specific load and temperature derating limits.
LED load connection	Do not connect a DC/DC converter or constant-current driver between this driver and the LED load. The selected output voltage and total output power must remain within the rated limits.
Ambient installation limit	The dedicated installation manual limits ambient temperature to 60°C. This is separate from the case-temperature rating; also obey the current model-specific load derating curve.
Connection sequence	Connect the LED lamps before applying AC power to avoid LED damage.
PUSH button specification	Use only a normally open pushbutton without an indicator light. Follow the model-specific PUSH-to-line diagram; never wire the PUSH button to neutral.
Push-terminal wiring	For AC input, LED output and the applicable PUSH/DALI push terminals, the manual specifies 14–18 AWG stranded wire, 0.823–2.08 mm², or solid-wire diameter 1.024–1.628 mm. Strip 10 mm. Suggested push-down force 3–4 kp (6.61–8.81 lbf); no screw-tightening torque is specified for these push terminals.
Small screw-terminal wiring	For the fitted FAN/NTC/SYNC screw terminals: 22–26 AWG stranded wire, 0.129–0.326 mm², or solid-wire diameter 0.404–0.643 mm; strip 7 mm. Use a 3 mm Phillips screwdriver; recommended tightening torque 2.88 kgf·cm (2.5 lbf·in). Apply these values only to the fitted small screw terminals, not the mains/output push terminals or the KNX bus connector.
Cover and tools	The manual specifies a 6 mm Phillips screwdriver and 4.6 kgf·cm (4 lbf·in) for the cover screws. Its terminal-tool table specifies a 3 mm Phillips screwdriver; the connection drawing shows pressing the release button with a slotted screwdriver to insert/remove the wire. Use a suitable tool for the actual release mechanism.
KNX commissioning	Obtain the application database through ETS Online Catalogs or the manufacturer’s product catalog. Configure the actual KNX system and observe bus polarity. The current driver catalog specifies 220–392 VDC input; the older installation manual’s 220–417 VDC headline does not extend that limit.
Circuit-breaker reference	Maximum units on a 230 VAC breaker according to the installation manual: B10: 13; B16: 21; C10: 22; C16: 35. These are calculated references for ABB S201 miniature circuit breakers; select protection for the actual installation.