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Quadruple Power Switch DAFG-PS4-24V

Digitally Controlled Quadruple Power Switch With Waveform Generator for Driving Electropneumatic Actuators

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This power switch is a combination of four high-current power switches with a dedicated power supply unit and a programmable, digitally controlled waveform generator.

The device is able to provide a continuous output current of about 2 A and peak currents of 8 A to loads like electropneumatic actuators that require high inrush currents for their operation. The four outputs provide rectangular voltages with a fixed amplitude of 24 V.

The signal output can be synchronized with external instruments via the trigger and synchronization inputs. The trigger signal may be electrical with TTL levels or optical according to the Versatile Link standard.

The device is equipped with an interlock loop that disables the output if it is opened. The power switch is extensively monitored to protect the device and the load from possible damages.

The built-in waveform generator is equipped with a USB data interface for transferring waveform data to or from the device. A remote control utility emulating the human interface on the front panel is available.

#Technical Data


  • Quadruple power switch providing high peak output current
  • Programmable waveform generator with USB interface
  • 10" case, bench top or rack mount

Power Switch

  • Output connector: Amphenol Eco-Mate RM RT0014-12SNH (panel receptacle with 12 female contacts)
  • Output voltage: 24 V (4 independent outputs)
  • Output current: > 2 A continuous (all channels together), 8 A pulsed typ.


  • Interlock loop:
    • Connector ODU MEDI-SNAP G51M07-P02LPH0-0070
    • Two pins at the output connector
    • (Short circuit on both connectors enables the power switch)
  • Overcurrent protection: output current limiter (2.2 A typ.)
  • Overtemperature protection:
    • Temperature sensor at the heatsink
    • (Shutdown and restart temperatures freely programmable)


  • Input switchable between TTL and optical
  • TTL input:
    • Connector: insulated BNC socket
    • Levels: Low < 0.8 V, High > 2.0 V
    • Input impedance: 51 kΩ (internal pull-down)
    • Precision: better than 50 ns
  • Optical input:
    • Connector according to the Versatile Link standard
    • Precision: better than 200 ns


  • TTL input:
    • Connector: insulated BNC socket
    • Coupling: AC
    • Level: > 250 mVpp, 5 Vpp maximum
    • Input impedance: 50 Ω or 51 kΩ (internal pull-down)
    • Allowed frequency range: 5–20 MHz


  • LEDs: Power (+24V, +5VD, and +5VT), Switch Activated, Interlock, Failure
  • Supply voltage monitoring
  • Temperature monitoring
  • Switch monitoring

Waveform Generator

  • Resolution: 16 bit
  • Data rate: 254 S/s – 16.7 MS/s
  • Total memory size: 512 KW (= 512 KWords = 1 MB)
  • Memory space for waveform data: 508 KS (= 520192 samples)
  • Waveform size: variable from 2 S to 64 KS (= 65536 samples)
  • Maximum number of stored waveforms: 100
  • Maximum number of stored measurements: 100
  • Trigger: manual / external
  • Trigger delay: 0 ms – 6.5 s, adjustable with a precision of 0.1 ms
  • Smart triggering for selecting the measurement for the next output
  • External synchronization

Human Interface

  • Monochrome LCD display 128×64 pixels; pixel size: 0.5 mm, pixel color: yellow, background: blue, background illumination: white LED
  • Keypad: 5 keys: 4× direction + 1× "enter"
  • Encoder: 24 positions per revolution, integrated press button
  • Press button for amplifier activation
  • Optional external shutdown button via the interlock loop

Digital Interface

  • USB interface according to USB 2.0 standard
    • Connector: USB plug type B
    • Data transfer rate: up to 12 MBit/s (Full Speed)
    • Effective data transfer rate: >100 kBit/s

Power Supply

  • Rated voltage: 115/230 V ±10%, 50/60 Hz
  • Power consumption:
    • Standby (switch deactivated): <10 VA, 6 VA typ.
    • Maximum: 90 VA
  • Main fuses: 115 V: T 1.25 A, 230 V: T 0.63 A (slow acting, size ø5×20 mm)
  • Mains connection: IEC inlet with EMC filter and integrated fuse holder


  • 3 U 10" bench-top case:
    • Height: 133 mm, width: 236 mm, depth: 315 mm
    • Total depth including handles and connectors: 367 mm
    • Total width including handles: 249 mm
    • Total height including case feet: 148 mm
  • Forced cooling:
    • 80 mm fan on the rear panel, temperature-dependent switching
    • Monitored fan operation, warning in the event of fan failures
  • Weight: 6.2 kg
  • Cleaning: use only a damp cloth, avoid use of organic solvents


User Manual

DAFG-PS4-24V_1-20_A.pdf DAFG-PS4-24V_1-20_A.pdf, 357.6 KB: User manual
Older versions
DAFG-PS4-24V_1-20_0.pdf DAFG-PS4-24V_1-20_0.pdf, 356.2 KB
Manual.txt Manual.txt, 60 B: Manual revision history

Other Documents

DAFG-PS4-24V_1-20_CE-Decl.pdf DAFG-PS4-24V_1-20_CE-Decl.pdf, 116.7 KB: EC Declaration of Conformity


Further user manuals, software, and firmware can be downloaded here: DAFG-1S

Information on how to open the various file formats can be found here.

#Additional Information


Programmable digital waveform generator module

Shipment Contents

  • Power switch DAFG-PS4-24V in 10" case
  • Line cord (universal IEC mains lead, length 1.8 m)
  • Output cable with connector RT061412PNH-K, maximum length about 10 m
  • Control and diagnostic software (see above)
  • User manual (see above)


Coaxial cables
BNC, SHV, MHV, and combinations
USB cable, A plug to B plug, various lengths
Interface card
USB 2.0 interface card
Output cable(s)
1 or 2 Amphenol Eco-Mate RM plugs RT061412PNH-K, length up to about 10 m
Filter unit
High frequency filter for the output cable
(Not part of the shipment, please order separately)