What Happens When a Critical Control Rack Loses Power?
In oil, gas, and heavy industrial automation, a single power failure can halt production or compromise safety. The Schneider Electric 140CPS22400C redundant power supply module answers that challenge directly. As part of the Modicon Quantum series, it delivers stable 5.1 VDC output with redundancy, so your PLC rack keeps running even if one supply path falters.
This module accepts a wide 20 to 30 VDC input range, making it practical for 24 VDC control systems common in process plants. With a maximum input current of 3.8 A and inrush ratings of 25 A at 24 VDC or 14 A at 20 VDC, it handles startup demands without nuisance tripping. The 8 A redundant output current supports fully loaded Quantum racks.
Technical Specifications at a Glance
| Parameter | Value |
|---|---|
| Product Line | Modicon Quantum |
| Input Voltage | 20 to 30 VDC |
| Input Current | 3.8 A max. |
| Inrush Current | 25 A at 24 VDC, 14 A at 20 VDC |
| Output Voltage | 5.1 VDC |
| Output Current | 8 A (redundant) |
| Overvoltage Protection | Internal |
| Alarm Output | 1 NC contact, 6 A, 220 V |
| Overload Protection | 2.3 × max rated input voltage for 1.3 ms |
| Power Dissipation | 6 + (1.8 × Iout) watts |
| UL Listed | Yes |
Why Redundancy Matters in Process Control
Redundancy is not a luxury in continuous processes. The 140CPS22400C provides a backup path that keeps the 5.1 VDC rail alive if one supply fails. The internal overvoltage protection and overload capability (2.3 times rated input for 1.3 ms) add layers of defense against transients. Local LEDs give immediate status feedback, while the normally closed alarm contact rated 6 A at 220 V can trigger a fault signal to your DCS or alarm panel.
Where This Module Fits
Oil and gas facilities often run Modicon Quantum PLCs for pipeline monitoring, compressor control, and safety shutdown systems. The 140CPS22400C suits these environments because it tolerates the 20–30 VDC range typical of 24 VDC battery-backed supplies. In water treatment, it keeps dosing and filtration control online during brownouts. For manufacturing lines, it prevents costly downtime when a single power supply degrades.
Installation and Maintenance Pointers
Mount the module in a Quantum rack per Schneider Electric guidelines. Ensure input wiring is sized for 3.8 A and protected against reverse polarity. Keep ventilation clear to manage the 6 + (1.8 × Iout) watt dissipation. Periodically inspect LEDs and test the alarm contact. For safety-related systems, follow the manufacturer’s safety manual and perform general inspections only.
Compatibility and Sourcing
The 140CPS22400C integrates directly into Modicon Quantum backplanes. If your system uses fieldbus networks, confirm gateway or cabling needs with your supplier. Oil AutoTech offers hands-on technical selection help and fast dispatch, worldwide, so you get spares when you need them. Please verify current lifecycle status and availability with Oil AutoTech before ordering.
Frequently Asked Questions
What is the output current of the 140CPS22400C?
It provides 8 A redundant output current at 5.1 VDC.
Can this module be used in 24 VDC systems?
Yes, the input range is 20 to 30 VDC, covering standard 24 VDC supplies.
What does the alarm output do?
It is a normally closed contact rated 6 A, 220 V, signaling a power supply fault.
Is the 140CPS22400C UL Listed?
Yes, UL Listing is confirmed in the specifications.
How do I calculate power dissipation?
Use the formula 6 + (1.8 × Iout) watts, where Iout is output current in amperes.
