Mean Well RSP-1000 Switching Power Supply

48 A usable on 12 V

A 576 W budget at the 80% rule — the 12 V / 60 A rail feeding module rows, cooling banks and control boxes outright.

Parallels to 4000 W

Active current sharing on the CS pin links up to four units (3+1) — the only supply in the Mean Well screen set that can.

5-year warranty

The longest cover in the family — the RSP-150 through RSP-500 carry three years. Tender paperwork writes itself.

Factory mechanical drawing: 295 × 127 × 41 mm, Case 952B, TB1 and CN50 marked, twin-fan airflow path

12 V rail budget

60 A × 80% = 48 A usable · 720 W × 80% = 576 W usable per unit

24 V rail budget

40 A × 80% = 32 A usable · 960 W × 80% = 768 W usable per unit

1 · Link CS, +S and −S between units

The factory diagram parallels +S, −S and CS mutually across every unit in the bank — these three signals are the sharing bus.

2 · Match outputs within 0.2 V first

Set each unit’s +V ADJ at the load end and confirm the spread across units stays under 0.2 V before the bus ties together.

3 · Size the bank with the factory formula

Maximum continuous output current = rated current per unit × number of units × 0.9. The 0.9 factor is the sharing-accuracy allowance — do not design past it.

4 · Stay above 5% of bank rating

When total draw falls under 5% of the bank’s rated current, the datasheet warns sharing may drift out of balance — split the bus instead of over-banking a small load.

5 · Parallel short, feed the load

Tie the units together with short, large-diameter wiring, then run a single feed to the load — the factory diagram’s own wiring rule.

Remote ON/OFF (pin 6 to pin 2)

Short the pair and the unit powers ON; open it and the unit powers OFF. It ships shorted by connector. Wire it to a timer, light sensor or room controller to blank the screen on schedule without touching mains. To switch several units together, join +S to +V and −S to −V across the units.

Remote sense (+S / −S, pins 1–2)

Run thin twisted sense wires to the far end of the DC bus and the regulation loop compensates up to 0.5 V of cable drop — more than the RSP-500’s 0.3 V. At 60 A on the 12 V rail, harness and bus-bar resistance can shave tenths of a volt; sense wiring recovers it, fixing the bright-center, dim-corner cabinet.

DC OK (pin 5, open collector)

The pin pulls low (0–1 V) while the output is up and sits at 3.3–5.6 V when it drops. Sink ≤10 mA, external voltage ≤5.6 V. Wire it to a PLC input or the controller’s fault line and the cabinet reports a dead rail before operators see a black section.

External voltage (Vci)

Apply 1–6 VDC between Vci (pin 9) and −S (pin 2). The response is non-linear — roughly 1 V sits near the 40% floor and 6 V near the 110% ceiling — so read the factory curve before scripting a set point.

External resistance (R1 / R2)

A 1/8 W resistor from 390 Ω to open (R1) pulls the rail down; one from open to 7.5 kΩ (R2) pulls it up. Fixed trims without a controller — pick the resistor from the two factory curves, not by trial.

RSP-150 · 5 V 30 A

120 W budget, fanless chassis with remote ON/OFF — the single-bay entry.

RSP-200 · 5 V 40 A

160 W budget, fanless 1U, twelve rails down to 2.5 V.

RSP-320 · 5 V 60 A

240 W budget with a speed-controlled fan — the dense indoor cabinet unit.

RSP-500 · 5 V 90 A

360 W budget with remote sense — the top of the 5 V chain.

RSP-1000 · 12 V 60 A

576 W budget, parallel to 4000 W, 5-year warranty — the kilowatt platform above the 5 V chain.

1 · Mount on the flanges

M4 screws with 6 mm maximum penetration at the base holes and 4 mm at the sides, torqued 7–11 Kgf-cm. Keep the marked airflow path open — the twin fans are the thermal design.

2 · Wire AC, DC and ground

Mains into TB1 (18 Kgf-cm), the DC bus across +V/−V (10 Kgf-cm), FG bonded to cabinet earth. Check polarity with a meter before the first power-up.

3 · Optional: control and sense wiring

Run the +S/−S pair to the far end of the bus, the ON/OFF pair to your controller, DC_OK to a PLC input. Keep sense wires twisted and away from the switch-node wiring. For parallel banks, tie CS, +S and −S across units.

4 · Set the rail with +V ADJ

Trim at the load end under full load — the 12 V model adjusts 10–13.5 V, the 24 V model 20–26.4 V — then confirm each cabinet measures the same within a few tenths.

5 · Load-test and monitor

Run a full-white pattern for ten minutes, feel for hot spots, confirm the fans respond to load and DC_OK sits low (output up), then re-torque before closing the cabinet.

Cabinet reboots or dead sections

A latched OVP reads as dead-until-repower; constant-current overload reads as a dimmed bus. Measure the rail during the dropout before replacing modules.

Power supply diagnostics →

Dim corners, one cabinet

Aging capacitors or an unsensed long run sag the far end of the bus. The +S/−S pair exists for exactly this cabinet — enable it before rewiring.

Uneven brightness troubleshooting →

Flicker on camera or under load spikes

An overloaded rail dips for a frame at a time. Flicker that tracks bright content points at the supply first — recheck the 80% budget before touching the modules.

Fix LED screen flickering →

Sample · 1–10 pcs

For repairs, prototypes and trial cabinets — shipped from stock with the nameplate you see above.

Project · 10–500 pcs

Whole-screen and fleet quantities with per-cabinet load math and the parallel-bank wiring planned into the harness.

Volume · 500+ pcs

Production-line pricing with container freight planning and batch date-code consistency.

Can the RSP-1000 run on a 110 V outlet in the US?

Yes. The 90–264 VAC universal input carries full rated load across 110–120 V grids (12 A AC input at 115 VAC); only the 90–100 V band asks for the 10% derating the factory static-characteristics table specifies. No step-up transformer is needed for US, Canadian or Japanese grids.

How many LED modules can one RSP-1000-12 drive?

At the 80% loading rule: 576 W or 48 A usable on the 12 V rail. Typical 12 V module rows draw about 10–15 W of average program material, so one unit covers roughly 38–57 such modules plus the cabinet’s cooling and control loads — verify against your module datasheet. For 5 V module bays, step down to the RSP-500 or LRS-600 instead.

Can I parallel RSP-1000 units for more current?

Yes — it is the only supply in the Mean Well screen set with a sharing feature. Link the CS, +S and −S pins across units, match outputs within 0.2 V first, and size the bank by the factory formula: maximum continuous current = rated current per unit × number of units × 0.9. Up to four units (3+1); keep total draw above 5% of the bank rating. The RSP-150 through RSP-500 have no sharing and must not be paralleled.

What does the DC OK signal do and how do I wire it?

DC OK (CN50 pin 5) is an open-collector status output referenced to GND (pins 11–12): it pulls to 0–1 V while the output is up and sits at 3.3–5.6 V when the output drops. The transistor sinks up to 10 mA from an external circuit at 5.6 V maximum. Wire it to a PLC input or the controller’s fault line so the cabinet reports a dead rail immediately.

Why did my RSP-1000 shut off and not come back?

Check which protection tripped. Overload (105–125%) recovers by itself through constant current limiting, and over-temperature recovers once the chassis cools. Over-voltage is the exception: it latches the output off until the unit is re-powered — cycle the AC feed, then find the upstream cause before restarting the screen. And if the output never comes up at all, check that the Vco–Vca jumper is in place when the programming function is unused.

What warranty and service life does Mean Well publish?

A 5-year warranty — the longest in the RSP family, where the smaller members carry three — with a dual-method MTBF: 939,400 hours minimum by Telcordia SR-332 plus 116,500 hours minimum by MIL-HDBK-217F at 25°C.

RSP-1000 or RSP-500 for my screen?

Pick by rail voltage. The RSP-500-5 feeds 5 V module bays with 90 A / 450 W; the RSP-1000 carries 12 V-and-up bays with up to 1008 W, adds the parallel function, wider 0.5 V sense window and a 5-year warranty. A mixed cabinet — 5 V modules plus 24 V cooling and control banks — legitimately uses both.

Can I trim or program the output voltage?

Both. The +V ADJ trimmer covers the rail’s adjustment window (the 12 V model 10–13.5 V, the 24 V model 20–26.4 V), and the programming input extends the range to 40–110% of nominal via an external 1–6 VDC source or a 1/8 W resistor. Keep the Vco–Vca jumper in place whenever the function is unused — without it the supply has no output — and stay clear of the OVP threshold near 120% of nominal.

LED Display Power Supply (Mother Catalog)

The three-brand mother catalog: 27 model pages, 2026 price bands, architecture map and the 80% load math — start here.

Open the mother catalog →

Mean Well RSP-500 (5 V 90 A)

The 5 V counterpart: 450 W with remote sense on CN100 — the top of the 5 V chain.

View the RSP-500 →

Mean Well LRS-600 (500 W)

The economy ladder top: 5 V / 100 A / 500 W across seven rails.

View the LRS-600 →

Mean Well NEL-400 (400 W)

The slim alternative: 5 V / 80 A in a 30 mm chassis with conformal coating standard.

View the NEL-400 →

Mean Well RSP-320 (300 W)

The 5 V step below: 60 A across twelve rails with universal PFC.

View the RSP-320 →

Mean Well RSP-200 (200 W)

Fanless 1U: 5 V / 40 A / 200 W with active PFC and no moving parts.

View the RSP-200 →

Mean Well RSP-150 (150 W)

Small-bay option: 5 V / 30 A / 150 W in a fanless chassis, the site’s 110 V-native page.

View the RSP-150 →

LED Display Power Consumption

Screen-level power math: module draw, brightness settings, breaker sizing and cable gauges.

Read the power guide →

Power Supply Diagnostics & Replacement

Test a suspect supply, swap it inside a live screen, and root-cause repeat failures.

Read the diagnostics guide →