HG G-57500

Photo inductive frequency generator HG G-57500-D

Frequency Generator

When it comes to track guidance of driverless vehicles, inductive systems are the most reliable. In order to fulfil the demands of various applications, many generators have been developed. The frequency generator HG 57500-D generates an AC current in a conductive loop for track guiding Automated Guided Vehicles (AGV). The generator HG G-57500-D is compact and cleanly built. It was constructed to be particularly easy to service. Contrary to its extensive performance, the frequency generator HG G-57500-D definitely has an extremely low price which conforms to the “Low cost“ AGV concept.

Main Functions

  • Dual Loop Frequency Generator
  • For use with Guiding Antennas
  • 2 Generator Channels with 16 selectable frequencies each
  • Supports stacking
  • Euro card format, for 19" rack
  • Generates AC current with I = 30 to 200 mA (depending on variant, see table on data sheet)

Functional Description

The frequency generator generates an AC current in a conductive loop for track guiding Automated Guided Vehicles (AGV). The board hosts two independent generators with power amplifiers and a transformer for DC-decoupling. Frequencies are stored in an EPROM and may be selected by using either the 16 position HEX switch or 4 digital inputs.

Sketch showing the function of the frequency generator
Sketch: Function

Both generators undergo voltaic conversion through a different transformer, are therefore separately adjustable and are set to give a constant output level. Short circuit and circuit breaks are detected and indicated by LEDs on the front panel.

Each generator provides 2 sets of separate connectors for connecting a short loop or a long loop. The maximum load impedance and current differs between short and log loop by a ratio of approximately 1:2. The trim potis 'Strom 1', 'Strom 2' are affecting both outputs simultaneously.

For load impedances higher than 100 Ohms the inductive reactive component can be balanced by a capacitor which has to be assembled on the board (use output „loop closure long compensated“). The capacity has to be determined for each application.

In addition the frequency generator supports stacking. This means that the two generators on the board can be connected in series. Thus a loop can be fed with twice the impedance.


As optional accessory 19“ racks for up to 5 frequency generators are available, HG G-93160-A with power supply unit and HG G-93161-A for connection to an external power supply (see data sheet and device description).


AttachmentFilesize  –Uploaded
PDF icon Data Sheet HG 57500-D Rev. 06 (PDF)135.78 KB23.03.2021
PDF icon Device Description HG 57500-D Rev. 04 (PDF)735.94 KB06.11.2015