SolaHD SDN-D rail power supply

Quick check of selection specifications

The main models and core parameters of SDN-D series are as follows:

Parameter SDN 10-24-100D SDN 20-24-100D SDN 40-24-100D

Rated output current 10A @ 60 ° C 20A @ 60 ° C 40A @ 60 ° C

Continuous power increase of 12A (-40~50 ° C), 22A (-40~50 ° C), 44A (-40~50 ° C)

Input voltage range 100-240Vac (90-275VDC) same left same left

Input current (100Vac) 3.0A 6.2A 10.6A

Efficiency (240Vac full load) 95% 94.5% 94.9%

Output voltage adjustable 24-29Vdc (multi turn potentiometer) same left same left

Ripple noise (typical)<50mV p-p<50mV p-p<50mV p-p

Holding time (100Vac)>150ms>150ms>150ms

Dimensions H × W × D (mm) 123 × 50 × 111 123 × 60 × 127 123 × 125 × 135

Weight approximately 0.8kg, 1.1kg, 1.8kg

Key selection points:

Select the rated current based on the total power consumption of the load and consider the demand for power increase.

If the working environment temperature exceeds 50 ° C but is below 60 ° C, it can be used according to the rated current; 60-70 ° C needs to be calculated according to the derating curve.

For high wave loads, confirm whether the 1.5-fold/4-second lifting capacity is sufficient.

When remote monitoring is required, select the SCM module corresponding to the protocol.

Practical installation and wiring

1. DIN rail installation

The SDN-D series adopts standard 35mm DIN rail installation, with simple and reliable steps:

Tilt the power supply slightly backwards and clip it into the upper edge of the DIN rail.

Press down until the bottom claw contacts the guide rail.

Push forward on the lower leading edge and lock it with a "click" sound.

Slight shaking confirms that the buckle is securely locked.

2. Panel installation

For applications directly fixed on the panel, the SDN-PMBRK3 panel mounting bracket kit (two brackets per set) can be selected. The bracket will increase the depth by about 2-4mm. Please refer to the kit manual for specific installation steps.

3. Wiring precautions

The input terminals support AC (L, N) and DC (+/-) sharing, with a wide voltage range (90-275Vac/90-300Vdc).

The dual output terminal design facilitates parallel wiring or looping to the next device.

The DC OK relay contacts (normally open/normally closed) can be used to report the power status to the PLC digital input module.

It is recommended to install a suitable circuit breaker or fuse at the input end (depending on the input current and surge characteristics).

Communication and Diagnostic Monitoring: Detailed Explanation of SCM Module

To achieve Industry 4.0 level power health management, SolaHD provides the SCM (SolaHD Communications Module) series of communication modules. Each SCM module can be connected to 1 or 2 SDN-D series power supplies, which can be directly plugged in through the included 8-inch connection cable without additional wiring.

1. Supported protocols and models

Model Protocol Network Interface

SCM-E-EIP EtherNet/IP (ODVA certified) dual RJ45, supporting star and wire types Device Level Ring

SCM-E-MBUS Modbus TCP dual RJ45, as above

SCM-W-HTR7 HART 7 (Fieldcomm Group registration) 2-wire terminal, point-to-point or multi-point

2. Monitored data items

Through the SCM module, users can obtain the following key parameters in real-time:

Power parameters: output voltage, output current, input voltage, internal temperature of the power supply, maximum/minimum value recording.

Alarm and Warning: Output short circuit, overvoltage, overheating, power boost activation.

Users can configure warnings: output current threshold, temperature threshold.

Counter and Timer: Total lifespan of power supply operation, running time since last power on, and number of occurrences of various faults.

Equipment information: model, serial number, firmware version, power status, SCM status.

3. LED status indication

The SCM module provides module status and network status LEDs for quick diagnosis:

Module status: Green constantly on (normal), green flashing (standby/not configured), red flashing (recoverable fault).

Network status: Green constantly on (connected), green flashing (no connection), red flashing (connection timeout), red constantly on (IP conflict).

4. Typical application scenarios

Predictive maintenance: By monitoring the temperature rise trend inside the power supply, early warning of poor heat dissipation or overload can be given.

Fault tracing: The event log records the time point when the power supply abnormality occurred, assisting in analyzing the cause of system shutdown.

Remote diagnosis: The health status of all cabinet power supplies can be viewed in the central control room, reducing on-site inspections.

Redundant configuration and system reliability improvement

For critical process controls such as petrochemicals, water treatment, and continuous production lines, a single power failure may cause the entire system to shut down. The SDN-D series can be paired with SDN redundant modules to form a 1+1 redundant power supply system:

Working principle: Two SDN-D power supplies of the same specifications are connected to a redundant module, which uses diode "OR" logic internally to automatically select the power supply with the higher output voltage. When one power supply fails or the output drops, the other seamlessly takes over.