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Brake/clutch control with overvoltage

This electronic board, now in its third generation, deals with the control of the power supply of electromagnetically operated brake / clutch groups.
It is able to continuously power the group with a maximum of 2 A at 24 Vdc. For a faster response of the mechanical system, it controls a programmable olvervoltage up to 48 Vdc: this can be programmed via the RS232 serial port from 1 to 255 ms.

All the functions are governed by a microcontroller. In this way it is possible to implement control functions that are difficult to obtain with simple analog circuits or based on logic networks. The two channels dedicated to driving the brake and the clutch are managed independently, i.e. the timing of the overvoltage can be set with different durations.
The switching takes place by driving a suitable PNP input: if in the LOW state, for example, the brake is activated, if in the HIGH state the clutch is activated (the outputs can be exchanged, of course).

An additional input is used as an ENABLE signal: connected to the machine emergency response line, it allows to disable all outputs.
In addition to the two outputs for controlling the brake / clutch unit there are two other PNP outputs (max 50 mA @ 24 Vdc), one of which is used to indicate the so-called READY signal.
The system can also work at 12 Vdc.

Power supply:

  • one input for the voltage of 12/24 Vdc ± 10% for the control logic and brake / clutch in steady state;
  • one input for the voltage of 24 ÷ 48 Vdc for the overvoltage of the brake / clutch unit.

5 PNP inputs:

  • one is used as an enabling signal (READY);
  • one is used to to change the state of the output (e.g. LOW = brake, HIGH = clutch);
  • three more inputs are available for future uses.

4 PNP outputs:

  • 24 VDC / 2 A brake power supply (up to 48 VDC) with programmable duration;
  • 24 VDC / 2 A clutch power supply + supercharging (up to 48 VDC) with programmable duration;
  • READY signal;
  • one additional spare output manageable by the microcontroller for future applications.​

RS232 serial port: (115200,8,N,1) this is mainly used to change the setup of the board, i.e. the timing of the overvoltages.

Maximum switching frequency: this is mainly overvoltage time dependant.

Dimensions: 9,8 cm x 8,8 cm

For more information, please use the following form.

MultiControl V.2

For one of the our most valued customer we have designed and programmed an electronic board based on the powerful microcontroller dsPIC 33FJ256MC710a from Microchip.

Multi Control V. 2.0
Multi Control V .2.0

Here below we summarize the main features, just enough to understand what types of electronic systems TSP is able to create according to customer specifications.

  • microcontroller dsPIC33FJ256MC710a from Microchip
  • 24 inputs working at 24 V
  • 24 PNP outputs working at 24 V
  • differential incremental encoder interface
  • CAN bus
  • 2 x RS232
  • RS422/RS485 optoisolated
  • I2C Bus
  • estended power supply 9-30 Vdc
  • dimension 188 x 130 mm

Here below you can see some details about the layout and the PCB.

Layout of the board
PCB tracing and routing
The board is inside the control panel of the machine

For more information please use the following form.

Microwave detector and counter for sheets of paper

For a particular industrial application, a special microwave sensor has been invented and patented. Its use is foreseen when it is necessary to count the number of sheets of paper within a specific volume. It is used to check the number of sheets taken from a pile so as to know with certainty, for example, how many will end up in an envelope. The following diagram shows how it can be used.

Schema di montaggio

The system is composed of:

  • an electronic unit that generates and emits a microwave RF signal and subsequently carries out the measurement of its power after it has interacted with the material;
  • a cavity within which the measuring material is placed;
  • connection cables for the RF signal.
SNA v1.2

The measurement takes place in a very short time (<1 ms) and in contactless mode: the material is not altered at all.

Sensors and paper

For more information please use the following form.