MAL-FU
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Isolating Frequency/Voltage Converter Transformed. Frequency Becomes Voltage. Ideal for rotation measurement: The frequency/ voltage converter measures frequencies and converts them into a proportional voltage signal, which is then adjusted to the input of a PC data acquisition system. Minimum Size. Great Performance. Small Price. The miniature format of the MAL-FU is ideal to realize measurement applications even if the installation is in problematic locations. Despite the small size, the measuring amplifier features great functionality. All this at a reasonable price. 3 Frequency Ranges. 0..5V Out. Frequency ranges of 100Hz, 1kHz, or 10kHz can be configured for the MAL-FU via solder bridges. A frequency signal applied to the input generates a proportional voltage in the range of 0..5V at the output. Clearly Safe. The galvanic isolation provided by a fast opto-coupler at the input guarantees interference-free operation and protects the DAQ system and the PC against high potentials. Compatibility. The MAL series provides a great variety of measuring amplifiers, measuring converters, or filter modules. They can be used in any combination allowing for the solution of the most individual measuring tasks. Get Connected. With the backplanes of the BP series varying in size and design, signal connection is easy. The modules just have to be plugged on the relevant slot of the backplane. ► www.bmcm.de bavarian measurement company munich

Ansicht von oben/ Top view 1 Installation The measuring amplifier is plugged onto a 24-pin socket. If the marking of the socket is on the left, pin 1 is bottom left. Check for correct poling. Change modules only at no load! The pin assignment of the MAL-FU is illustrated in the figure above and in the following table. • Only close one solder bridge at a time to configure the measuring range (JL1, JL2, or JL3). • All other jumpers are for internal use only and must not be changed! 4 Notes to the Functionality of the Module The module is an analog transforming F/U converter. At the lower end...

5 Interfacing Examples The module output is proportional to the input voltage in all operating modes and ranges. Apply cable shield at one end only. If earthing is required, connect the screen only at one end, otherwise there is a risk of hum pick-up. 5.1 Frequency Measurement The input is decoupled by an optocoupler. The input range is 4..25V and the input resistance 1kQ. 5.2 Sensor Supply The module does not provide a sensor supply. A 5V sensor supply can be taken from the BP16 backplane (see chapter 6) if desired. Connect an extra power supply unit for sensors which need a higher supply...

The following MAL modules and BP backplanes from bmcm are available: 7 Important Notes for Using the MAL-FU • The MAL-FU is only suitable for extra-low voltages - please observe the relevant regulations! • Only use an electrical isolated power supply unit (with CE). • Turn off the power before mounting the module onto the carrier board. • All accessible pins are electrostatic sensitive devices. Provide for a grounded conductive work place. • MAL-FU must only be operated in closed housings (for reasons relating to EMC). • The input frequency produces an output ripple which is especially high...