Product details
1.0 Core identification
- SD834 3BSC610067R1 – 24 V DC switch‑mode power supply
- type : 480 W, 20 A output, for non‑redundant/redundant systems
- use with : SS823/SS832 diode voting units for redundancy
2.0 Technical data – indented tree
- electrical input
- nominal 100‑240 V AC / 110‑150 V DC (wide range 85‑276 V AC / 88‑187 V DC)
- frequency 50‑60 Hz ±6%
- inrush current <13 A (soft start prevents fuse trip)
- power factor 0.95/0.90, efficiency 92.4/93.9%
- output
- 24 V DC regulated, 20 A continuous (30 A for <4s)
- ripple <100 mV, line/load regulation <10/<100 mV
- holdup time @230V/20A: min 36ms (typ 51ms)
- overvoltage protection <37 V, hiccup short circuit (2s on/17s off)
- environment & safety
- operating 0…+55 °C, storage -40…+70 °C
- IP20, pollution degree 2, corrosive atmosphere G2
- safety: IEC 61131‑2, UL 508, EN 50178 (SELV/PELV)
- cULus Class I Div 2, marine (ABS, BV, DNV‑GL, LR)
- EMC EN 61000‑6‑4 / ‑6‑2, overvoltage cat. III
- mechanical
- W 82 mm x H 124 mm x D 127 mm, weight 1.2 kg
- DIN rail mounting, spacing W 15 mm / H 40 mm
3.0 Key features & benefits
- no external mains filter – built‑in EMI compliance
- soft start – avoids tripping fuses/breakers at power‑on
- parallel operation – increase output power with multiple SD834
- DC‑OK relay – floating contact for supervision
- SELV/PELV – safe for direct connection to control circuits
4.0 Package, warranty & logistics
- kit includes : SD834 unit, documentation leaflet
- warranty : 12 months against defects
- shipping : FedEx, UPS, DHL – express tracked
- inquiries :
sales@powergearx.com |
+86 18030005825 (WhatsApp)
5.0 Professional FAQ (experience + selection guide)
- Can I use SD834 without a redundancy module?Yes, it works as a standalone 24V supply. For 1+1 redundancy add SS823 or SS832.
- What external fuse do I need for the primary?Use a 10‑20 A slow‑blow fuse or circuit breaker (type C recommended).
- Is the output really SELV even at 20 A?Yes. It meets EN 50178, so output is safely separated and SELV/PELV approved.
- Can I mount this unit vertically on DIN rail?Yes. It is designed for DIN rail mounting in any orientation, but keep 15 mm side spacing for cooling.
- Does it have a DC‑OK signal for PLC?Yes. The floating relay contact changes state when output is normal.
6.0 Typical application & diagnostic tip
- use case : 24 V control power for PLC racks, I/O, field devices in cabinets
- diagnostic hint : green DC‑OK LED on front – if off, check primary fuse and overload
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