MEAN WELL PSC-60B is an AC/DC power supply with battery charger in the open PCB version. It provides a 27.6 V main output rated at 1.4 A and a 27.6 V charging output rated at 0.75 A, within a combined catalogue rating of 59.34 W. An external 24 V nominal battery can supply the connected load during an AC interruption.
Product Datasheet
Download MEAN WELL PSC-60 Datasheet (PDF)
The PSC-60 section is on PDF pages 5, 6, 7. Refer to the complete mechanical drawings and notes when planning installation.
Model and output ratings
| Complete model |
PSC-60B |
| Configuration |
open PCB version |
| External battery nominal voltage |
24 V |
| CH1 output voltage |
27.6 V |
| CH1 rated current |
1.4 A |
| CH2 charge voltage |
27.6 V |
| CH2 rated charging current |
0.75 A |
| Rated total output power |
59.34 W |
| CH1 current range |
0–2.15 A |
| CH1 voltage adjustment range |
24–29 V |
| CH1 ripple and noise, maximum |
240 mVp-p |
| CH1 tolerance / line / load regulation |
±1.0% / ±0.5% / ±0.5% |
CH1 supplies the load and CH2 charges the external battery. The stated power is the combined unit rating, not a separate allowance for each output. Keep the simultaneous load and charging demand within the total power rating and the applicable current and derating limits.
The CH1 current-range ceiling is not an additional output on top of the rated charging load. The CH2 column specifies rated charging current without a separate adjustable current range.
SVR1 adjusts the CH1 output voltage. Ripple and noise are measured with 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.
Input and timing
| Input voltage |
90–264 VAC / 127–370 VDC |
| Input frequency |
47–63 Hz |
| Typical efficiency |
84% |
| Typical AC current |
1.6 A at 115 VAC / 1 A at 230 VAC |
| Typical cold-start inrush current |
30 A at 115 VAC / 60 A at 230 VAC |
| Leakage current |
<1 mA at 240 VAC |
| Set-up / rise time at full load |
800 / 50 ms at 230 VAC; 1600 / 50 ms at 115 VAC |
| Typical hold-up time at full load |
50 ms at 230 VAC / 10 ms at 115 VAC |
Unless otherwise specified, catalogue measurements use 230 VAC input, rated load and 25°C ambient temperature. Set-up time is measured at the first cold start; repeated ON/OFF switching can increase the set-up time.
Battery backup and protection
| Overload protection |
105–150% of rated output power; hiccup mode with automatic recovery after removal of the fault |
| CH1 overvoltage protection |
28.98–37.26 V; hiccup mode; automatic recovery after the fault is removed |
| Battery low-voltage cut-off |
21 ± 1 V |
| Battery low alarm threshold |
<22 V |
With AC present, the supply powers the load and charges a connected 24 V nominal battery at the same time. When AC fails, the external battery supplies the load through the backup circuit. Connect the battery to Battery + and Battery −, and the load to +V and −V.
The protection features include short circuit, overload, overvoltage, battery low-voltage cut-off and battery reverse-polarity protection by fuse. Verify battery polarity before connection; fuse protection is not a normal operating mode.
The battery is external. Select its capacity and charging requirements for the application; a battery, battery harness and standalone UPS enclosure are not specified as included with this power supply.
AC OK and battery-low open-collector signals
| Alarm output type |
TTL open collector |
| External alarm circuit limits |
50 V maximum applied voltage / 30 mA maximum sink current |
| Low-state voltage |
0.3 V maximum at 30 mA |
| AC OK signal, CN2 pin 2 |
Low when the supply is ON; high or open when the supply is OFF |
| Battery-low signal, CN2 pin 1 |
Low below 22 V battery voltage; high or open above 22 V |
An external voltage source and resistor are required. Reference the alarm circuit to CN2 pin 6, DC output common. The ON/OFF descriptions refer to conduction of the open-collector output, not to a powered relay contact.
Cooling, derating and environment
| Cooling |
Free-air convection |
| Working temperature |
−20 to +70°C, subject to derating |
| Working humidity |
20–90% RH, non-condensing |
| Storage temperature and humidity |
−20 to +85°C / 10–95% RH |
| CH1 temperature coefficient |
±0.03%/°C over 0–50°C |
For this open PCB version, the horizontal-mounting temperature curve permits 100% load from −20°C through 50°C, then reduces linearly to 50% at 70°C.
The input-voltage curve at 60 Hz permits 80% load at 90 VAC, rising to 100% at 115 VAC and remaining at 100% through 264 VAC. Apply both the input-voltage and ambient-temperature limits.
For fanless operation above 2,000 m, reduce the permitted ambient temperature by 3.5°C per additional 1,000 m. This is an altitude-related thermal derating condition.
Vibration specification: 10–500 Hz, 2 G, 10 minutes per cycle, 60 minutes each along the X, Y and Z axes.
Safety, EMC and reliability
| Safety approvals listed |
UL62368-1; TUV BS EN/EN62368-1; EAC TP TC 004 |
| Withstand voltage |
Input–output: 3 kVAC; input–FG: 2 kVAC; output–FG: 0.5 kVAC |
| Isolation resistance |
100 MΩ between input–output, input–FG and output–FG at 500 VDC / 25°C / 70% RH |
| Emissions compliance |
BS EN/EN55032 (CISPR32) Class B; BS EN/EN61000-3-2 and -3; EAC TP TC 020 |
| Immunity compliance |
BS EN/EN61000-4-2, -3, -4, -5, -6, -8 and -11; BS EN/EN55035, light-industry level; EAC TP TC 020 |
| MTBF |
3681.4K hours minimum, Telcordia SR-332 (Bellcore); 589.7K hours minimum, MIL-HDBK-217F at 25°C |
The supply is a component for installation in final equipment. Reconfirm EMC compliance in the completed equipment. Catalogue EMC testing used the unit mounted on a 360 × 360 mm metal plate, 1 mm thick.
The catalogue specifies a 100% full-load burn-in test and a two-year warranty.
Mechanical installation and mass
| Specified dimensions, L × W × H |
101.6 × 50.8 × 29 mm |
| Unit mass |
130 g — catalogue PACKING reference per unit |
| Packing entry |
0.13 kg; 96 units / 13.5 kg / 1.39 CUFT |
| Cover / L-bracket references |
998A-T / 998A-D |
The PCB drawing uses a 95.25 × 44.45 mm mounting-hole pattern with four Ø3.3 mm holes. The mechanical drawing gives a general ±1 mm tolerance and shows up to 3 mm of underside pin projection; allow installation clearance accordingly.
HS1 and HS2 must not be shorted; maintain a safe isolation distance between HS1 and the system case. M1 is the safety-ground point. For improved EMC performance, electrically connect M1, M2 and chassis ground.
The corresponding -C assembly uses cover reference 998A-T and L-bracket reference 998A-D. These are mechanical component references for an enclosure enquiry; separate supply or a complete conversion kit must be confirmed with the supplier.
Connections and mating-part selection
| CN1 AC input |
JST B3P-VH or equivalent; pin 1: AC/N; pin 2: no pin; pin 3: AC/L |
| CN1 mating parts |
JST VHR housing series and JST SVH-21T-P1.1 terminals, or equivalent |
| CN2 DC, battery and alarm output |
JST B6P-VH or equivalent; pin 1: Battery Low; pin 2: AC OK; pin 3: Battery −; pin 4: Battery +; pin 5: DC output +; pin 6: DC output common (−V) |
| CN2 mating parts |
JST VHR housing series and JST SVH-21T-P1.1 terminals, or equivalent |
Use the numbered connector drawing when wiring; connector orientation differs between families. Select the complete VHR housing reference for the required circuit count, wire size and current. Loose mating housings, crimp terminals and wiring assemblies are not stated as included.
Connect the protective earth before operation and preserve the required insulation clearances. Use the manufacturer's installation instructions together with the dimensional and connection drawings.
Application selection
The main DC output and dedicated charging output support battery-backed security equipment, access control, alarm systems, emergency lighting and central monitoring. Size the load and battery charging demand together, and verify the battery charging voltage, alarm interface, mechanical version and environmental derating for the installation.
