Product Overview and Engineering Role
The SimtoLink AC-DC DIN-rail switching power supply is built for DIN-rail cabinets and tightly packed installs. It converts a wide-range DC bus into several DC outputs, with hiccup-mode short-circuit protection and reinforced insulation, and it feeds relay and contactor coils, HMIs, and communication modules from one rail.
Key figures follow the nameplate and the Hardware Specification. SimtoLink can supply conducted and radiated test summaries, derating curves, and notes on certification options. Volume orders can be split by output combination and terminal style, each with its own order code.
Reliability and Site Conditions
Electrical safety and EMC tests follow common industry practice. The input is reinforced against surge and reverse polarity, and the power stage is laid out for both cooling and common-mode control.
Size the power margin for load steps and ripple, and keep the airflow above and below the DIN rail clear. Outdoor or salt-spray sites can add a coating or a sealing kit. Before the supply goes into service, SimtoLink recommends checking the input range, full-load temperature rise, and insulation on a sample.
Key Hardware Parameters
The table is the typical-configuration set for this supply, ready to drop into a selection sheet or a bid clause. A wider range, redundant power, or an intrinsically safe explosion-proof build is quoted by SimtoLink with the Hardware Specification and the Installation and Commissioning Guide. Sister order codes can differ in small ways; the nameplate and the documents packed with the unit govern.
| Parameter | Specification | Remarks |
|---|---|---|
| Input range | DC 18～75V | Wide range |
| Output | DC 5V/12V/24V | Regulation within ±1% |
| Power | 150W | Derating curve |
| Isolation voltage | 4242 VDC | Reinforced insulation |
| Efficiency | >91.1 % | Half load |
| Protection | Short-circuit hiccup | Auto recovery |
| Ripple | <152 mVpp | 20 MHz bandwidth |
| Operating temperature | -35～80 ℃ | Derating applies |
| Certification | ATEX | Optional by industry |
| MTBF | >400,000 hours | MIL-HDBK-217 |
Typical Use Cases
Four ways this supply is usually deployed, for scheme design and for judging payback:
DIN-Rail Row in the Control Cabinet
It shares the rail with the PLC, relays, and isolators, and feeds both the logic side and the actuator side from one supply.
Security and ELV Room
Several DC branches serve access control, switches, and NVRs, so a failed branch can be swapped without rebuilding the cabinet.
Traffic and Tunnel Plant
The wide-temperature build feeds a shared DC bus for fans, lighting, and monitoring terminals.
Renewable Auxiliary Supply
Regulated rails for the BMS and the communications board on a PV-storage or converter auxiliary bus.
Installation, Grounding, and Maintenance
- Before power-up, confirm rated input, polarity, and breaker rating, and size the continuous current from the derating curve.
- Bond PE to system ground, separate input and output wiring, and keep both clear of VFD and relay-arc noise.
- Choose load-cable cross-section and voltage drop from continuous current and ambient temperature.
- Leave airflow above and below the rail, and check terminal temperature rise and ripple on a routine pass.
- After hiccup protection trips, clear the load-side fault before you reset and reapply power.
Ordering, Documentation, and Support
SimtoLink issues the hardware specification, an outline drawing, a wiring table, and a sample project for this supply. Volume buys can include a sample review and inspection at the factory. Warranty and calibration are set by the contract and by the documents shipped with the unit.
Further Reading
Other power modules in the same family: