Control-power monitor for DC fast chargers

The charger says
"faulted".
We say why.

RailSentinel-24 clips onto the DIN rail and watches the 24 V control supply every relay, contactor and controller in the cabinet depends on — the one layer OCPP can't see.

Request a pilotSee what it does
DC FAST CHARGER · CONTROL CABINET · 24 V AUXNORMAL
PSUAC/DC · 24 V · 10 A RAILSENTINEL RS-24 CLOUD · DASHBOARD · NFCNFC +24 V CONTROL RAIL CONTROLLER● OKOCPP CONTACTOR K1 DC OUTPUT RELAY BOARD×8 ▲ 41.8 V · 2 µs · captured
rail 24.1 Vlast peak —events 24 h 0
The blind spot

Your monitoring stops one layer above the fault.

When a contactor opens, the 24 V rail rings. The controller browns out before it can write a log — and the dashboard just says "faulted".

What you see today
?

"Faulted." Then a callout.

Power-cycle, drive home, wait for it to happen again.

→
What RS-24 sees
41.8 V

The spike, the time, the trend.

Captured in hardware at microsecond speed, stored on the board, sent to you.

What it does

Three things. One small module on the DIN rail.

Catches the event

Hardware trigger, 16-bit peak capture and an envelope of every transient — timestamped, even through a power loss.

<2 µs trigger · 16-bit peak · 50 ms envelope · 1,000 events

Answers at the cabinet

Tap your phone on the enclosure and read the last events before you open the door. No app, no network, no login.

Passive NFC · works offline · metal cabinets

Shows it coming

Rail voltage, load, vibration, sound and cabinet temperature, trended per device and across the fleet — the visit is planned, not emergency.

12–62 V · ±0.15 V · fleet dashboard
RS-24 dashboard: voltage, current, vibration and acoustic trends with telemetry and spike-event logs
RS-24 dashboard v1.4 · bench data
Who it's for

One device, three ways to stop paying for restarts.

Know which charger is drifting before it goes offline.

One avoided callout pays for a year of monitoring. Every event is evidence your PSU supplier can't wave away.

Without

Six emergency visits, no root cause.

6 × €400
With RS-24

Alert on day 4, one planned visit, right part in the van.

1 × planned

Arrive with the answer, not the question.

Tap the cabinet, see the fault history, fix it once. Hand over every commissioning with a signed PSU health report.

Without

Three trips, a scope on the third.

3 × callout
With RS-24

Three events read off the phone before opening the door.

1 × done

Turn "no fault found" into field data.

Integrate the bare module at PCB level. Every shipped unit reports real operating conditions — warranty disputes end on data.

Without

400 h bench test, board comes back again.

Open claim
With RS-24

Logs show grid-side switching at that site.

Not liable
Variants & mounting

Same board. Pick the enclosure.

NFC 35 mm DIN RAIL · 6 M · SNAP-ON
RS-24-S

Standard

DIN rail, IP40, for managed sites with Ethernet.

  • Ethernet / WiFi
  • NFC on the front face
  • 12–62 V
NFC · EXT IP67 · BOPLA BOCUBE · M12 GLANDWALL / MAGNET MOUNT · CELLULAR
RS-24-F

Field

IP67, cellular, for remote and motorway sites.

  • NB-IoT / LTE-M
  • External NFC antenna
  • Supercap hold-up
HOST PCB65 × 55 mm · 4 × M2.5 STANDOFF · PIN HEADER
RS-24-M

OEM module

Bare PCB for factory integration.

  • 65 × 55 mm
  • REST API
  • Signed OTA updates
Beyond EV chargers

Same board, other cabinets.

RS-24 measures any 12–62 V DC supply. Chargers are where we start; if your control power lives elsewhere, talk to us.

DC only — 230 V AC mains monitoring is a different product.

  • 24 VIndustrial control cabinets — PLC, drives, HVAC, lifts
  • 48 VTelecom, battery and solar DC systems
  • 36–48 VUPS battery strings and server-room backup
Downloads

Documents.

Preliminary — values are design targets from the v1.0 hardware documentation and will be replaced by measured data after validation.

PDF

Product brief

One page: the problem, what RS-24 does, who it's for, variants, pilot programme.

1 p · EN PDF

Preliminary datasheet

Electrical, transient capture, isolation, connectivity, environmental, variants, compliance roadmap.

2 p · EN · Rev. P1

Hardware design documentation, sensing analysis and calibration procedures are available to pilot partners under NDA — ask at info@morgen-tech.com.

Ready to see inside the cabinet?

RS-24 is in active development. A limited number of pilot slots is open — units at cost, revenue share on the software, no long-term commitment.

CPOs & service companies

Request a pilot unit

Tell us your fleet size and the chargers that keep coming back.

hello@morgen-tech.com
Charger OEMs

OEM integration brief

RS-24-M module, API and data pipeline for your 12 / 24 / 48 V platforms.

sales@morgen-tech.com
Engineers

Technical documentation

Hardware design, sensing analysis and calibration documents on request.

info@morgen-tech.com