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Associated Products
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Flow measuring batch controller
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SY020 Pulse Rate to 4-20mA Converter
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SY024 Flow meter preamplifier
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SY027 pulse splitter
SY024PRC: SY024 Pulse Rate to 4-20mA converter
The SY024 PRC is a frequency to current converter designed to accept a frequency and produce a proportional 4-20mA output. The input can be configured by jumpers to match a wide range of transducer signals, eg. TTL pulse, open collector transistor, reed switch and coil. The reed switch inputs incorporates filtering to prevent false signals from contact bounce. The coil input accepts ac signals as low as 20mV pk-pk. The board requires a DC power supply of between 8 and 30V and incorporates reverse polarity protection. It can be supplied in an IP65 case or as a bare board. The range is set by BCD rotary switches. 3 versions are available with ranges to suit different applications. Pulse interval for version N is from 1 to 9999msec in 1 msec steps. For version F it is from 0.1 to 999.9 in 0.1msec steps. Version S is settable from 4 to 39.996 sec in 4msec steps.
When selecting it is usually best to select an SY024 that has the highest frequency range while still allowing for the lowest. eg. A unit is required to cover the range 0.1Hz (1 pulse every 10 seconds) to 100Hz. Versions L & N cover the range, but version L full scale can only be set in 4msec steps. 100Hz = 10msec so the closest would be 8msec (125Hz) or 12msec (83Hz). Version N would be the best choice as it is settable in 1 msec steps allowing for 10msec. The power supply should connect to the V+ and 0V terminals (Supply 8 - 30V). Reverse polarity protection is provided. Typical current consumption is 25mA.4-20mA output. The 4-20mA output is provided at the terminal marked NC. The unit sources the current so the load should be connected between NC and 0V terminals. Output compliance voltage is determined by the supply voltage Vs. The value is Vs - 3V. Maximum load resistance is therefore 250Ω at 8V and 1350Ω at 30V supply.
Base Price: £72.49 (Exc. VAT)
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