Schneider 140CPS21400 Power Supply Module 24V

140CPS21400 Modicon Quantum Power Supply Module

Product Introduction

The Schneider Electric 140CPS21400 is a high-performance power supply module specifically engineered for the Modicon Quantum automation platform. This unit converts a nominal 24V DC input into a stable 5.1V DC output, which powers the backplane and all connected I/O modules.

What sets the 140CPS21400 apart is its summable capability. You can connect multiple units in parallel to achieve higher total output current. This feature provides excellent scalability for large control systems that demand more power. Additionally, the module incorporates comprehensive protective functions, including internal overvoltage and overload safeguards, ensuring your entire system remains safe from electrical faults.

Consequently, the 140CPS21400 is widely used in manufacturing plants, process automation, and critical infrastructure where reliable DC power is essential for uninterrupted operations.

Technical Specifications

Input Characteristics

• Rated input voltage: 24V DC (acceptable range: 20V to 30V DC).

• Maximum input current: 3800 mA under full load.

• Inrush current: 14A at 20V and 25A at 24V – be mindful of this when sizing your upstream protection.

• Recommended external fuse: 5A, slow-blow type for safe overcurrent protection.

• Maximum input power interruption tolerance: 100 ms (1 ms at 20V). This ensures the module rides through brief voltage sags.

Output Characteristics

• Regulated output voltage: 5.1V DC – precisely maintained for stable backplane operation.

• Rated output current: 8A (summable when modules are paralleled).

• Internal overvoltage protection prevents damage from output voltage excursions.

• Internal overload protection shuts down the output during excessive current draw, automatically recovering once the fault clears.

Alarm and Indication

• One normally closed (NC) alarm relay output: rated at 6A, 220V AC/DC. This relay triggers when a power supply fault occurs, giving you a remote warning signal.

• Local status LED: a green PWR OK indicator lights up when the output is within normal operating range.

Power Dissipation

• The module dissipates heat according to the formula: 6 + (1.8 × Iout) watts, where Iout is the actual output current in amperes. For instance, at 8A output, dissipation reaches approximately 20.4W.

Mechanical and Environmental Parameters

Physical Dimensions

• Height: 100 mm (standard Quantum module height).

• Width: 40 mm – occupies one single slot in the backplane.

• Depth: 130 mm – fits easily into standard cabinets.

Weight

• Net weight: 0.65 kg (1.43 lbs).

• Shipping weight (package 1): approximately 0.79 kg (1.74 lbs).

Temperature Ranges

• Operating ambient temperature: 0°C to 60°C (32°F to 140°F).

• Storage temperature: -40°C to 85°C (-40°F to 185°F) – protects the unit during long-term warehousing.

Humidity and Altitude

• Relative humidity tolerance: 95% (non-condensing), ensuring dependable performance in damp environments.

• Maximum operating altitude: 5000 meters (16,404 feet) – significantly higher than many comparable modules, making it suitable for high-elevation installations such as mountain mining operations.

Certifications and Standards

• UL 508 and CSA C22.2 No 142 – meeting North American safety requirements.

• cUL and FM Class 1 Division 2 – suitable for hazardous locations where flammable gases or dust may be present.

• CE marking for European compliance.

EMC Immunity

• Electrostatic discharge resistance: 4 kV contact discharge and 8 kV air discharge per IEC 801-2.

• Electromagnetic field immunity: 9.1 V/m (equivalent to 10 V/m) over 80–2000 MHz per IEC 801-3. These ratings guarantee stable operation in electrically noisy industrial environments.

Installation Guidance

First, power down the entire Modicon Quantum rack before inserting the 140CPS21400 module. Slide the unit into the leftmost slot of the backplane – this is the designated position for the power supply. Secure it by tightening the retaining screws at the top and bottom.

Next, connect the 24V DC input wires to the terminal block located at the front of the module. Observe correct polarity: positive to the "+" terminal and negative to the "–" terminal. Install a 5A slow-blow fuse in the input line for protection. For the alarm output, wire the NC relay contacts to your supervisory system or indicator panel.

If your system requires more than 8A, you can add a second 140CPS21400 in parallel. Both units must be of the same type and connected with short, equal-length cables to share the load evenly. Furthermore, ensure adequate ventilation around the module, as power dissipation generates heat that must be dissipated into the surrounding air.

Packaging List

Your shipment of the 140CPS21400 includes the following items:

• Schneider Electric 140CPS21400 power supply module (1 unit)

• Removable terminal block (pre-installed on the module)

• Anti-static protective bag for safe handling

• Quick-start installation guide (paper sheet)

• Mounting screws (2 pieces)

Note: Cables, fuses, and external power sources are not supplied with this module. Please order them separately as needed.

Shipping and Delivery

We ship all orders via FedEx, UPS, or DHL – depending on your location and delivery preference. Every package is securely packed with adequate cushioning to prevent transit damage. Tracking information is provided upon dispatch. Standard international delivery takes 3 to 7 business days. Express options are available upon request.

Frequently Asked Questions (FAQ)

Q1: Can I use the 140CPS21400 with a 12V DC input source?
No. The 140CPS21400 requires an input voltage between 20V and 30V DC. Operating outside this range may cause erratic behavior or permanent damage. Always provide a regulated 24V DC supply.

Q2: What happens if I exceed the 8A output current limit?
The internal overload protection activates immediately. It will shut down the output to protect the module and the connected backplane. Once you reduce the load, the unit automatically resumes normal operation.

Q3: How many 140CPS21400 modules can I parallel for higher current?
You can parallel up to three units to achieve a total output of 24A. However, ensure all modules share the same input source and that wiring is symmetrical to balance the current distribution.

Q4: Does this module support hot-swapping?
No. You must power off the entire Quantum rack before inserting or removing the 140CPS21400. Hot-swapping is not supported and may damage the module or backplane.

Q5: The PWR OK LED stays off even after installation. What should I check?
First, verify that the input voltage is within the 20–30V DC range. Next, check the external 5A fuse – it may have blown during inrush. Also, confirm that the module is fully seated in the backplane and that the retaining screws are tight. If the problem persists, test the module in a different rack slot.