ABB DP840 frequency measurement module

ABB DP840 frequency measurement module

Basic information
Product type: Pulse counting or frequency measurement module.
Signal specification: 24V DC (19.2-32V DC).
Associated module terminal units: TU810, TU812, TU814, TU818, TU830, TU833, TU842, TU843, TU844, TU845, TU852, TU854.

Electrical parameter
Rated insulation voltage: 50V.
Dielectric test voltage: 500V AC.
Power consumption: 4W.
Current consumption: +5V module bus 115mA; +24V external, NAMUR = 56 + 0.5 x external load (mA), 12V = 89 + 0.7 x external load (mA), 24V = 97 + external load (mA).

Signal processing parameter
Frequency measurement error: maximum relative error, when the measurement time is 10ms, 300ppm; At 20ms, it is 150ppm; At 50ms, 60ppm; At 100ms, it is 30ppm. Crystal oscillator maximum error: 120ppm + 5ppm/year. Maximum absolute error = relative error + oscillator error (measurement time is 10ms, service life is less than 16 years) : 500ppm (i.e. 0.05%).
Counter: Pulses are counted by adding up 16-bit counters.
Frequency measurement range: 0.5Hz-20kHz.
Input filter: There are a variety of filtering time, 10μs: 0.5Hz-20kHz; 100μs: 0.5Hz-5kHz; 800μs: 0.5Hz-625Hz; 6400μs: 0.5Hz to 78Hz.

Diagnostic function
Indicators: There are LED indicators on the front panel, including F (fault), R (running), W (warning), P (main), P (pulse) and F (fault) of channels 1-8, which can indicate module error, module warning, channel error, etc. It also has process voltage monitoring, loop monitoring and other functions.
Environmental parameter
Operating temperature: 0°C to + 55°C (Certified operating temperature range is + 5°C to + 55°C).
Storage temperature: -40°C to + 70°C.
Relative humidity: 5% to 95%, no condensation.

Mechanical parameter
Dimensions: Width 45mm, depth 102mm (including connector 111mm), height 119mm.
Weight: 0.3kg.