The MEAN WELL SD-1000L-24 is an isolated DC/DC converter with a 24 V output rated at 40 A and 960 W. Its L-code input accepts 19–72 VDC, subject to the input-voltage and temperature derating curves. A built-in fan with speed control, remote sensing, remote ON/OFF control and an OUTPUT OK signal support equipment integration. A separate nominal 12 V auxiliary output supplies up to 0.25 A.
Product Datasheet
Download MEAN WELL SD-1000 Datasheet (PDF)
The SD-1000 section is on PDF pages 22, 23, 24, 25. Refer to the complete mechanical drawings and notes when planning installation.
Model and Output Ratings
Full model
SD-1000L-24
Series
SD-1000
Input version
L: 19–72 VDC
DC output voltage
24 V
Rated output current
40 A
Rated output power
960 W
Output current range
0–40 A
Output voltage adjustment
23–30 V
Maximum ripple and noise
150 mVp-p
Voltage tolerance
±1.0%
Line regulation
±0.5%
Load regulation
±0.5%
Use the stated voltage, current and power limits together when setting the output. The series name is not the output-power rating of every voltage version. Remote sensing compensates wiring loss within its own limit; it does not increase the converter rating.
Input and Electrical Performance
DC input range
19–72 VDC
Typical efficiency
88%
Typical input current
23.5 A at 48 VDC
Set-up / rise time at full load
500 / 50 ms
Standard measurement conditions
48 VDC input, rated load and 25°C ambient
Ripple and noise are measured at 20 MHz bandwidth using a 12-inch twisted pair terminated with parallel 0.1 µF and 47 µF capacitors. Voltage tolerance includes set-up tolerance, line regulation and load regulation.
Select the DC source and wiring for the actual input range and input-current demand. Apply the low-input load restriction as well as the ambient-temperature restriction.
Protection
Protection functions
Short circuit, overload, overvoltage and overtemperature
Overload threshold
105–125% of rated output power
Overload behavior
Constant-current limiting; output shutdown after approximately 5 seconds
Overload recovery
Reapply input power to recover
Overvoltage threshold
30.8–35.2 V
Overvoltage behavior
Output shutdown; reapply input power to recover
Overtemperature behavior
Output shutdown; automatic recovery after the temperature falls
Power Connections and Signal Mating Parts
DC input terminal block, TB1
Pin 1: DC INPUT V+; pin 2: DC INPUT V−; pin 3: FG
Main DC output
Separate busbar terminals marked +V and −V
Signal connector
CN51 HRS DF11-10DP-2DS or equivalent
Signal-pin assignment
pin 1: +S; pin 2: −S; pin 3: OUTPUT OK; pin 4: GND; pin 5: AUX; pin 6: AUXG; pin 7: RC1; pin 8: RC2; pin 9: RCG; pin 10: NC
Mating housing
HRS DF11-10DS or equivalent
Mating terminal
JST SPHD-002T-P0.5 or equivalent
Connect protective earth to FG and observe the markings on the main output busbars. Leave CN51 pin 10 (NC) unconnected.
Choose the mating housing, terminals and wire assembly for CN51 from the listed references. Confirm which mating parts are supplied with the order.
Auxiliary Output
Auxiliary supply pins
CN51 pin 5: AUX; pin 6: AUXG
Auxiliary voltage range
10.8–13.2 VDC
Maximum auxiliary current
0.25 A
Auxiliary return
AUXG is isolated from the main +V and −V outputs
This nominal 12 V supply is separate from the main output. Use AUXG as its return. CN51 pin 4 GND is connected to the main −V output and is not the isolated auxiliary return.
Remote ON/OFF Control
Remote-control pins
CN51 pin 7: RC1; pin 8: RC2; pin 9: RCG
Figure 1.2(A), external 5 V
Use the external 5 V source and 620 Ω series resistor shown with RC2 / RCG; switch open: output on; switch closed: output off
Figure 1.2(B), internal auxiliary supply
Link AUX pin 5 to RC1 pin 7 and switch RCG pin 9 to AUXG pin 6; switch open: output on; switch closed: output off
Figure 1.2(C), internal auxiliary supply
Link AUX pin 5 to RC1 pin 7 and switch RC2 pin 8 to RCG pin 9; switch closed: output on; switch open: output off
Select one complete control circuit from the function drawing. The opposite switch action in Figure 1.2(C) depends on its RC2-to-RCG connection; apply the switch-state table only to the corresponding wiring.
OUTPUT OK Status and Remote Sensing
OUTPUT OK pins
CN51 pin 3: OUTPUT OK; pin 4: GND
OUTPUT OK interface
Open-collector signal
OUTPUT OK maximum external voltage / sink current
13 V / 10 mA
OUTPUT OK voltage mode
Output on: 0–0.5 V; output off: 12–13 V
Signal GND reference
Connected to the main −V output
Remote-sense pins
CN51 pin 1: +S; pin 2: −S
Maximum remote-sense compensation
0.5 V line-voltage drop
Connect +S to the positive load terminal and −S to the negative load terminal using a twisted pair. Keep the sense pair separate from the load-current conductors and observe the 0.5 V compensation limit. The OUTPUT OK connection is a status interface, not a load-power output.
Cooling and Environmental Limits
Cooling
Built-in fan with speed control
Working temperature
−20 to +60°C, subject to derating
Horizontal-installation thermal curve
100% load through 50°C; reduce to 60% at 60°C
Input-voltage load curve
70% load at 19 VDC; 80% at 24 VDC; 90% at 36 VDC; 100% from 48 to 72 VDC
Working humidity
20–90% RH, non-condensing
Storage temperature / humidity
−40 to +85°C; 10–95% RH, non-condensing
Temperature coefficient
±0.02%/°C from 0 to 50°C
Vibration
10–500 Hz, 2 G; 10 minutes per cycle, 60 minutes on each X, Y and Z axis
Keep the fan inlet and exhaust path clear. The published curves are for horizontal installation; apply the input-voltage and temperature limits together.
Above 2000 m, reduce the allowable ambient temperature by 5°C for each additional 1000 m for this fan-cooled model.
Safety and EMC
Catalogue-listed safety approvals
IEC 62368-1 CB approved by TUV; TUV BS EN / EN 62368-1; AS/NZS 62368.1; EAC TP TC 004
Withstand voltage
Input–output: 2 kVAC; input–FG: 2 kVAC; output–FG: 0.5 kVAC
Isolation resistance
Input–output, input–FG and output–FG: 100 MΩ at 500 VDC, 25°C and 70% RH
EMC emission
BS EN / EN 55032 (CISPR 32); EAC TP TC 020
EMC immunity
BS EN / EN 61000-4-2/-3/-4/-6/-8; light-industry level; EAC TP TC 020
The EMC test installation uses a 720 × 360 × 1 mm metal plate. This converter is a component for integration into final equipment; check the completed installation against the applicable EMC requirements.
Mechanical Data and Installation
Catalogue dimensions, L × W × H
295 × 127 × 41 mm
Case number
952B
Mechanical-drawing tolerance
±1 mm
Mounting-thread callouts
Use M4, L = 6 mm and M4, L = 4 mm at their respective marked positions in the drawing
Mass, catalogue PACKING reference per unit
1940 g
Catalogue packing
1.94 kg; 6 units / 12.6 kg / 1.15 CUFT
Minimum MTBF
898.2K hours, Telcordia SR-332 (Bellcore); 106.7K hours, MIL-HDBK-217F at 25°C
Catalogue warranty
3 years
The 41 mm enclosure height supports 1U equipment layouts. The catalogue states a series power density of 10.7 W/in³; use the actual output rating of this model when sizing the installation. SVR51 is the output-voltage adjustment control.
Follow the hole locations and location-specific screw lengths in the mechanical drawing. Allow additional space for the projecting terminals, mating connectors, cable bends and cooling airflow. The catalogue dimensions are not a complete installed cable-clearance envelope.
The per-unit PACKING figure is a catalogue packing reference, not a measured net weight or shipping-package weight.
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