MEAN WELL RSP-500-27 is a single-output enclosed AC/DC switching power supply rated 27 V, 18.6 A and 502.2 W. It accepts 85-264 VAC or 120-370 VDC and includes active PFC, a DC cooling fan, remote ON/OFF control and remote sensing. Its 230 × 127 × 40.5 mm enclosure has a 1U profile. Apply the model-specific fan behavior and derating conditions below.
Product Datasheet
Download MEAN WELL RSP-500 Datasheet (PDF)
The RSP-500 section is on PDF pages 18, 19, 20, 21. Refer to the complete mechanical drawings and notes when planning installation.
Model and Rated Output
Complete model
RSP-500-27
Series / construction
RSP-500; single-output enclosed AC/DC switching power supply with built-in active PFC
Rated DC output
27 V; 18.6 A; 502.2 W
Output current range
0-18.6 A
Output voltage adjustment
26-30 V, using SVR1 (+V ADJ.)
Ripple and noise
150 mVp-p maximum
Voltage tolerance
±1.0%
Line regulation
±0.2%
Load regulation
±0.5%
Typical efficiency
89.5%
RSP identifies the series, 500 is the catalog output-wattage family designation, and the final 27 identifies the nominal output voltage. This model is rated 502.2 W; the family name does not override that model-specific value.
Keep output current and power within this model's ratings and apply the temperature and input-voltage derating limits. Adjusting voltage does not increase the permitted rated current or power.
Unless otherwise stated, specifications are measured at 230 VAC input, rated load and 25°C ambient. Voltage tolerance includes setup tolerance, line regulation and load regulation.
Ripple and noise are measured with 20 MHz bandwidth, using a 12-inch twisted pair terminated with 0.1 µF and 47 µF capacitors in parallel.
Input and Start-up
AC input
85-264 VAC, universal full range
DC input
120-370 VDC
Input frequency
47-63 Hz
Typical power factor
>0.95 at 230 VAC; >0.98 at 115 VAC, at full load
Typical AC input current
5.3 A at 115 VAC; 2.65 A at 230 VAC
Typical inrush current
20 A at 115 VAC; 40 A at 230 VAC
Leakage current
<2 mA at 240 VAC
Setup / rise time
1,500 / 80 ms at 230 VAC; 3,000 / 80 ms at 115 VAC, at full load
Typical hold-up time
18 ms at 230 VAC; 14 ms at 115 VAC, at full load
Input circuit
Built-in active PFC and active inrush-current limiting
The low-input static characteristic permits approximately 80% load at 85 VAC, rising to 100% at 100 VAC, then remaining at 100% through 264 VAC. The plotted input-voltage characteristic is for 60 Hz; temperature derating still applies.
Protection and Cooling
Short-circuit protection
Listed in the manufacturer datasheet
Overload protection
105-130% of rated output power; constant-current limiting, with automatic recovery after the fault is removed
Overvoltage protection
32.9-38.3 V; output shuts down, and input power must be reapplied to recover
Overtemperature protection
Output shuts down and recovers automatically after temperature falls
Cooling
Forced-air cooling by the built-in DC fan
Fan behavior
Temperature-controlled fan ON/OFF for this 27 V model
Typical fan thresholds
RTH2 >=50°C ±10°C: fan on; RTH2 <=40°C ±10°C: fan off
Indication
LED indicator shown beside the terminals and output-voltage adjuster
Switching frequency
70 kHz, as shown in the block diagram
The overload threshold is a protection setting, not an extra continuous or timed peak-power allowance.
RTH2 is the internal thermistor temperature, not the ambient operating temperature. Keep the airflow path clear even when the fan is temporarily stopped.
The manufacturer datasheet lists a 3-year warranty; coverage is subject to the applicable manufacturer warranty terms.
Built-in Remote ON/OFF and Remote Sense
Connection
CN100, four positions; remote control and remote sense are built-in functions
CN100 pin 1: -S
Negative sense; connect to the negative terminal of the load
CN100 pin 2: +S
Positive sense; connect to the positive terminal of the load
CN100 pin 3: RC-
Return for the RC+ control-signal input
CN100 pin 4: RC+
Remote ON/OFF control-signal input
Power ON
RC+ to RC- open, or 0-0.8 VDC between pin 4 and pin 3
Power OFF
4-10 VDC between RC+ pin 4 and RC- pin 3
Remote-control circuit
The catalog switch example uses an external power source and I=6-20 mA
Remote-sense compensation
Up to 0.3 V of voltage drop in the load wiring
For remote sensing, connect +S to load positive and -S to load negative. Twist the two sense leads together to reduce noise pickup; the main load current uses the DC output terminals.
Wire the remote-control switch and external source as shown on catalog page 21. In that circuit SW OFF or an open connection turns the supply ON, while SW ON applies 4-10 V and turns it OFF. Do not confuse the switch label with the power-supply state.
Connector and Connection Parts
CN100 onboard connector
HRS DF11-04DP-2DS or equivalent
Mating housing identified in the catalog
HRS DF11-4DS or equivalent
Crimp-terminal family as printed
HRS DF11-**SC or equivalent
Connection quantity
One four-position CN100 connection; populate the contact positions needed for the functions being wired
The catalog prints ** in the contact reference. Select the exact contact variant for the intended wire and connector specifications before ordering; a complete contact suffix is not specified here.
The connector references identify mating parts for the control/sense interface. The datasheet does not state that a mating housing, loose contacts, control switch or external control source is supplied with the power supply.
Dimensions, Mounting and Power Terminals
Enclosure dimensions
230 × 127 × 40.5 mm (L × W × H); 1U profile
Mechanical drawing
Case No. 226A; dimensions in mm, drawing tolerance ±1 mm
Base mounting callout
5-M4, L=4 mm
Side mounting callout
4-M4 (both sides), L=5 mm
AC input TB1
Pin 1: AC/L; pin 2: AC/N; pin 3: FG (protective earth)
DC output TB2
Pins 1-3: -V; pins 4-6: +V
Output adjustment
SVR1 (+V ADJ.) beside the terminal area
Airflow
The mechanical drawing shows airflow into the fan end of the enclosure
Use the mounting layout on catalog page 20. The base drawing shows longitudinal references of 39.3 mm and 159.7 mm with a central 88 mm reference, and 19/69/89 mm transverse references. The side drawing shows 40 mm and 170 mm longitudinal references with 12.5 mm and 18 mm vertical references; these are hole-location dimensions, not ventilation-clearance distances.
Choose fastener engagement to match the drawing's L=4 mm base and L=5 mm side limits. The screw's total length must also allow for the thickness of the mounting material. Do not infer a terminal-tightening torque or wire gauge from these mounting-thread dimensions.
Keep the fan inlet, enclosure ventilation and air path unobstructed. The supplied datasheet does not specify a numerical external ventilation clearance. Connect protective earth at FG and observe the labeled input and output polarity.
Environment and Derating
Working ambient temperature
-30 to +70°C, subject to derating
Temperature/load curve
Horizontal mounting: 100% load from -30 to +50°C, decreasing to 50% load at +70°C
Input/load curve
60 Hz AC input: approximately 80% load at 85 VAC, 100% at 100 VAC, and 100% through 264 VAC
Working humidity
20-90% RH, non-condensing
Storage temperature / humidity
-40 to +85°C; 10-95% RH
Temperature coefficient
±0.03%/°C over 0-50°C
Vibration test
10-500 Hz, 2 G; 10 minutes per cycle; 60 minutes along each X, Y and Z axis
Altitude derating
Above 2,000 m (6,500 ft), reduce the allowable ambient temperature by 5°C per additional 1,000 m for this fan-cooled series
The intermediate sloping portions of the catalog curves are straight lines. The +70°C working limit does not mean full power is available at that temperature. Observe both the input-voltage and temperature limits for the installation.
Safety, EMC and Reliability
Safety standards listed as approved
UL62368-1; TUV BS EN/EN62368-1; AS/NZS 62368.1; EAC TP TC 004; CCC GB4943.1; BSMI CNS15598-1; BIS IS13252(Part1):2010 / IEC60950-1:2005
Withstand voltage
Input-output: 3 kVAC; input-FG: 2 kVAC; output-FG: 0.5 kVAC
Isolation resistance
100 MΩ for input-output, input-FG and output-FG, at 500 VDC, 25°C and 70% RH
EMC emissions
BS EN/EN55032 (CISPR32) Class B; BS EN/EN61000-3-2 and -3; EAC TP TC 020; GB/T 9254; CNS15936 Class B
EMC immunity
BS EN/EN61000-4-2, -3, -4, -5, -6, -8 and -11; BS EN/EN55035; BS EN/EN61000-6-2; EAC TP TC 020
MTBF reference
1,372.4K hours minimum, Telcordia SR-332 (Bellcore); 187.9K hours minimum, MIL-HDBK-217F at 25°C
These are the standards and test values listed in the supplied datasheet. The power supply is a component for installation in final equipment; EMC compliance of the completed equipment must be checked again. The datasheet refers installers to the manufacturer's EMI testing guidance for component power supplies.
The MTBF figures are statistical reliability references, not a guaranteed service life. Manufacturer product-liability information and applicable certification documents should be consulted for the final application.
Weight Reference
Catalog packing reference per unit
1.3 kg (1,300 g)
Published packing line
1.3 kg; 9 pieces / 12.7 kg / 0.7 CUFT
The 1.3 kg value is the catalog's stated per-unit packing reference. It is not described here as measured net weight or the total shipping-package weight.
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