The Sorensen HPD Series provides 300 watts in a quarter–rack wide chassis. It is ideal for OEM applications where wide adjustment of output voltage or current is required in a compact package, providing up to 300 watts of clean power.

Today, when we think about controlling the output of a power supply, we usually think about digital control via a USB port or some other network interface. That’s not the only way to control a power supply, though. Analog control is still used in many industrial applications, and it’s also a good choice if you have fairly simple control needs.

The optional Analog Programming (APG) Interface allows you to control the Sorensen XT and HPD Series DC power supplies with either 0-10 VDC signal or a 0-10 kΩ resistance. You connect these signals to the power supply via a female DB-25 connector on the unit’s rear panel.

The APG’s interface provides the following features:

  • Programmable output voltage and programmable current limit using either a 0-10 VDC programming signal or a 0-10 kΩ resistance. In this mode, both the offset and range are externally adjustable.
  • Fixed programming of output voltage and/or current limit using an available 10V reference (10mA max source).
  • 0-10 V readback of output voltage and current with externally adjustable offset and range.
  • Status signals for programming mode, operating mode, OVP (over voltage protection) flag, and output fail flag.
  • Adjustable over-voltage protection (OVP) with reset and flag.
  • TTL shutdown with selectable positive or negative logic.
  • Tracking for multiple supplies of the same output.

The performance specifications are shown in Table 1 below.

Remote Analog
0-10 VDC for 0-100% of rated
voltage or current ±0.1%,
0-10 kΩ for 0-100% of rated
voltage or current ±0.1%
 OVP Trip Range 3V to full output + 10%
Remote ON/OFF 2 to 25Vdc high. <0.8Vdc low.
User-selectable logic
Tracking Accuracy  ±1%

Table 1. APG specifications

As an example of how to use the features of the APG interface, let’s look at how to program the supply’s output voltage with a 0-10 VDC voltage source:

  1. Select remote voltage programming by moving the rear panel switch S1-5 (remote voltage program select) to the ON (closed) position. Or, connect J5 pin 7 (remote voltage program select) to J5 pin 6 (auxiliary ground). As these two control functions are wired in parallel, they function as a logic OR.
  2. Connect the voltage source between pin 17 (voltage program) and either pin 4 or pin 5 (program return).
  3. Vary the external voltage from 0-10 VDC to cause the power supply output to vary from 0-100% of rated output voltage. You may set the power supply’s output current limit using another source or the front panel current limit control.

The procedure for programming the output voltage with a 0-10 kΩ resistance and programming the output current with either a 0-10 VDC signal or a 0-10 kΩ resistance is very similar to this.

For more information on how to use remote analog programming, or isolating control signals, contact AMETEK Programmable Power via e-mail or call 800-733-5427.