ABB CP-E 24/1.25 Power supply
Product Overview
ABB CP-E 24/1.25 Power Supply is a power supply designed specifically for industrial automation control systems, playing a key role as the "energy heart" of the entire automation system. It can convert input AC power into stable DC power, providing reliable power supply for various industrial automation equipment such as PLC (Programmable Logic Controller), sensors, actuators, etc. This power supply, with its stable performance, efficient conversion efficiency, and excellent protection capabilities, ensures the continuous and stable operation of industrial equipment in complex industrial environments, effectively reducing the risk of equipment failure caused by power issues, and improving the continuity and stability of industrial production.
Features
Rated output voltage 24 V DC
Output voltage adjustable via front‑face rotary potentiometer “OUTPUT Adjust”
Rated output current 1.25 A
Rated output power 30 W
Wide range input 100‑240 V AC (85‑264 V AC, 90‑375 V DC)
Typical efficiency of 86 %
Low power dissipation and low heating
Free convection cooling (no forced cooling with ventilators)
Ambient temperature range during operation ‑40...+70 °C
Open‑circuit, overload and short‑circuit stable
Integrated input fuse
Redundancy unit CP‑RUD offering true redundancy, available as accessory
Signalling output "DC OK" (Transistor) for output voltage OK
LEDs for status indication
Application
The primary switch mode power supply offers two voltage input ranges.
This enables the supply with AC or DC. Furthermore it is equipped with two generous capacitors, which ensure mains buffering of at least 30 ms (at 230 V AC).
That is why the devices can be used worldwide also in high fluctuating networks and battery‑powered plants
Operating mode
By means of the potentiometer „OUTPUT Adjust“ the output voltage can be adjusted within a range of 24 to 28 V DC.
Thus, the power supply can be optimally adapted to the application, e.g. compensating the voltage drop caused by a long line length.
The green LED „OUTPUT OK“ is lightening during operation.
Installatio
Mounting
The switch mode power supply can be snapped on a DIN rail according to IEC/EN 60715 as shown in the accompanying picture.
For that the device is set with its mounting rail slide on the upper edge of the mounting rail and locked by lifting it downwards.
Demounting
Remove the switch mode power supply as shown in the accompanying picture. For that the latching lever is pulled downwards by means of the screwdriver.
Alternatively you can press the unlock button to release the device.
Then in both cases the device can be unhinged from the mounting rail edge and removed.
Mounting position
The devices have to be mounted horizontally with the input terminals on the bottom. In order to ensure a sufficient convection, the minimum distance to other modules should not be less than 25 mm in vertical and horizontal direction.
Electrical connection
Connect the input terminals L and N.
The protective earth conductor PE must be connected.
The installation must be executed acc. to EN 60950, provide a suitable disconnecting device (e. g. line protection switch) in the supply line.
The input side is protected by an internal input fuse.
Rate the lines for the maximum output current (considering the short‑circuit current) or provide a
separate fuse protection.
We recommend to choose the cable section as large as possible in order to
minimize voltage drops. Observe the polarity.
The device is overload, short‑circuit and open‑circuit proof.
The secondary side of the power supply unit is electrically isolated from the input and internally not
earthed (SELV) and can therefore be earthed by the user according to the needs with L+ or L‑ (PELV).
Safety instructions and warnings
The device must be installed by qualified persons only and in accordance with the specific national
regulations (e.g., VDE, etc.). The devices are maintenance‑free chassis‑mounted units.
Disconnect system from supply network!
Before any installation, maintenance or modification work: Disconnect the system from the supply
network and protect against switching on.
Before start of operation:
Attention! Improper installation/operation may impair safety and cause operational difficulties or
destruction of the unit. Before operation the following must be ensured:
Connect to main according to the specific national regulations.
Power supply cables and unit must be sufficiently fused. A disconnecting device has to be provided
for the power supply to disengage unit and supply cables from supply mains if required.
The protective earth conductor must be connected to the terminal PE (Protection class I)
The secondary side of the power supply unit is not earthed and can be earthed by the user according
to the needs with L+ or L‑.
Rate the output lines for the output current of the power supply and connect them with the correct
polarity.
In order to ensure sufficient air‑cooling the distance to other devices has to be considered.
In operation:
Do not modify the installation (primary and secondary side)! High current! Risk of electric arcs and
electric shocks (danger to life)!
Risk of burns: Depending on the operation conditions the enclosure can become very hot.
The internal fuse is not user‑replaceable. If the internal fuse blows, most probably the device is
defective. In this case, an examination of the switch mode power supply by the manufacturer is
necessary.
Attention! High voltage! Danger to life!
The power supplies contain components with high stored energy and circuits with high voltage!
Do not introduce any objects into the unit, and do not open the unit.
With some units of this range the output is capable of providing hazardous energy. Ensure that the service personnel is protected against
inadvertent contact with parts carrying energy
Working principle
The operation of ABB CP-E 24/1.25 Power supply is based on the principle of switch mode power supply. Firstly, the input AC voltage is converted into a DC voltage through a rectifier circuit, which is filtered to remove impurities and obtain a smoother DC signal.
Then, the DC voltage is chopped into a high-frequency pulse signal through a high-frequency switch circuit, and the duty cycle of the high-frequency pulse signal can be adjusted based on the feedback signal of the output voltage. By using a high-frequency transformer for voltage conversion, the voltage is adjusted to the required 24V DC voltage level.
Next, the high-frequency pulse signal is converted into a stable DC 24V output through rectification and filtering circuits. Throughout the process, the output voltage is monitored in real-time through a feedback circuit. When a change in the output voltage is detected, the feedback signal is transmitted to the control circuit, which adjusts the working state of the high-frequency switch circuit based on the feedback signal, thereby achieving precise adjustment and stable control of the output voltage.
At the same time, the built-in protection circuit of the power supply will monitor input and output current, voltage, internal temperature and other parameters in real time. Once an abnormal situation is detected, the corresponding protection mechanism will be triggered immediately to ensure the safety of the power supply and connected devices.
Key advantages
(1) High reliability
By using high-quality electronic components and rigorous manufacturing processes, and undergoing rigorous quality testing and aging tests, the power supply ensures stability and reliability during long-term operation. The powerful electrical protection function and excellent environmental adaptability enable it to effectively resist the adverse effects of complex electromagnetic interference, voltage fluctuations, mechanical vibrations, and other factors in industrial sites, reduce failure rates, minimize downtime, and ensure the continuity of industrial production.
(2) Efficient and energy-saving
Higher power conversion efficiency can effectively reduce energy consumption, which is in line with the trend of industrial energy-saving development. While supplying power to industrial equipment, it reduces energy loss, lowers operating costs, saves electricity expenses for enterprises, and reduces heat generation, lowering the investment and operating costs of heat dissipation equipment.
(3) Easy installation
The compact design and flexible installation method enable the power supply to be easily installed in various industrial control cabinets, equipment chassis, and other space limited environments. The standard DIN rail installation method and screw fixation method facilitate on-site installation and later maintenance, allowing for quick replacement of faulty power supplies and improving equipment maintenance efficiency.
(4) Wide applicability
The wide range of input voltage and frequency, stable output characteristics, and good compatibility make it suitable for various industrial automation scenarios and different brands of equipment. Whether it is a small automated production line or a large and complex industrial control system, it can provide stable and reliable power support for equipment, meeting the diverse needs of different industries and users.
