TTi CPX400SP - Bench/System DC Power Supply, PowerFlex Regulation, Smart Analog Control Single Output, USB, RS232, LAN and GPIB Interfaces

The CPX Series of laboratory DC power supplies is one of Aim-TTi's most successful product lines. Tens of thousands of CPX models are in service across the world.

PowerFlex regulation allows them to provide higher currents at lower voltages enabling the power to be tailored to suit a wider variety of applications.

The range includes single and dual output models with a total power ranging from 360 watts up to 840 watts.

CPX400D - Dual 420 Watt PowerFlex DC Power Supply (840W total)

The CPX series is a different type of laboratory power supply designed to meet the need for flexibility in the choice of voltage and current. A conventional PSU has a fixed current limit giving a power capability that reduces directly with the output voltage.

The TTi PowerFlex design of the CPX series enables higher currents to be generated at lower voltages within an overall power limit envelope. Each output can provide considerably higher current than a conventional PSU of the same maximum voltage and power (see power curve). Example voltage & current combinations for the CPX400D include 60V/7A, 42V/10A, 28V/15A, and 20V/20A.
 

Building Upon Success

The CPX400 series, now comprising five models, was developed from the CPX400A - one of the most successful power supplies ever.
 

Analog Controls With Digital Stability

As technology has changed, many products have moved from analog controls to digital ones. Although digital controls suit many instruments, they do not necessarily suit a bench power supply.

Customer research shows that many users prefer the speed and simplicity of conventional analog controls for setting voltage and current. Digital controls may offer greater precision, but often at the expense of ease-of-use. With this in mind, the CPX400 series retains the true analog controls of its predecessor.

The main disadvantage of analog controls is stability and security. The settings of analog potentiometers can drift over time. More importantly, the settings can be changed accidentally with potentially serious consequences.
 
The CPX series now incorporates S-Lock. One press of the Lock button transfers control of voltage and current from the analog controls to internal digital circuitry. This offers not just complete security, but exceptional stability as well with each setting controlled by an instrumentation quality DAC.
 

Isolated Voltage Tracking for Maximum Flexibility

The two outputs of the CPX400D are completely independent and electrically isolated from each other. With V-Track selected, the two outputs remain electrically isolated, but the voltage control of the Master output sets an identical voltage on the Slave output.

This enables the user to create two rails of either polarity and to reference them to different grounds if necessary (e.g. digital ground and analog ground). Alternatively the outputs can be wired in series or parallel to create a voltage capability up to 120V or a current capability up to 40A with the voltage set using a single control.
 

Independent and Simultaneous Output Control

The Both On/Both Off button is in addition to the individual switches for each output, and allow both outputs to be turned on or off synchronously by a single button press. Synchronous switching of the outputs is of increasing importance for circuitry which can be damaged if one voltage rail is present without the other