SolaHD SDN-D rail power supply

Attention: When configuring redundancy, the DC OK signal of each power supply can still be independently connected to the SCM module or PLC for fault alarm.

Parallel Capacity Expansion: If you need to increase the total output power (rather than redundancy), you can directly connect multiple power sources in parallel (consult technical support), but pay attention to the current sharing characteristics.

On site fault diagnosis and common problem handling

The SDN-D series power supply has comprehensive protection functions, and problems can be quickly located through LED indicator lights and DC OK contacts.

1. Interpretation of LED indicator status

Measures to deal with the meaning of indicator light status

Green constant light output is normal

Green flashing (4-second on/4-second off) power supply alternate start stop check for power boost mode or intermittent overload

Red flashing overload or overheating check whether the load exceeds the rated value or the continuous power increase range; Check if the ambient temperature is too high and if the heat dissipation is good

The red constant light protection action (short circuit, overvoltage, overheating) disconnects the load. If it is still red, it may be an internal fault; If the green color is restored, investigate the short circuit on the load side

2. DC OK relay logic

Contact closure: Normal output (voltage within rated range).

Contact disconnection: Abnormal output (no output, under voltage, protection action in progress).

This contact can be connected in series to the PLC emergency stop circuit or alarm input module.

3. Common troubleshooting table

Possible causes and solutions for the fault phenomenon

No output, LED off, input power not connected. Measure the input voltage (L-N or+/-) and check the circuit breaker/fuse

No output, LED red is always on, short circuit or overvoltage disconnects the load. If restored, check the insulation of the load circuit and whether the equipment is damaged

No output, red flashing LED for over temperature protection. Check if the ambient temperature is>70 ° C and clean the heat dissipation holes; reduce the load

Measure whether the output current exceeds the rated value when the output voltage is too low or the load is too large or the input is under voltage; Measure whether the input voltage is below 90Vac

Intermittent restart power boost mode repeatedly triggers to check for frequent inductive load startup; If normal, it can be regarded as a protective action

SCM module cannot communicate with network wiring or IP configuration errors. Check for twisted pair connections; Confirm that the IP address does not conflict; Use ping to test connectivity

4. Preventive maintenance recommendations

Check the tightening torque of input/output terminals every six months to prevent loosening and heating.

Use an infrared thermal imaging device to detect the temperature of the power supply body, with a focus on the capacitor and transformer areas.

Regularly read event logs through SCM modules and record the frequency of abnormal events.

For systems operating in extremely cold environments of -40 ° C, allow the power supply to preheat for a few minutes before powering on.

Technical certification and compliance

The SDN-D series has passed safety certifications in major global markets, making it convenient for equipment exports

North America: cULus Listed (industrial control equipment E61379, information technology equipment E137632, hazardous area E234790).

Europe: CE Low Voltage Directive, ATEX Directive (II 3 G Ex ec IIC T4 Gc).

International: IECEx certification, CB certification (IEC/EN 62368-1, 61010-1, etc.).

Environmental Protection: RoHS (EU, China).