Description

ABB DP840 8-channel pulse counting module

Data Introduction
Signal specification: 24V DC (Operating voltage range 19.2-32V DC).
Number of channels: 8.
Input characteristics: Each channel can be used for pulse counting or frequency (speed) measurement, with a measurement range of 0.5Hz to 20kHz. The input can also be read as a DI signal. Each channel is equipped with a configurable input filter.
Pulse counting: It is carried out through the accumulation of a 16-bit counter.
Isolation feature: Isolation between groups and ground.
Maximum relative error: When the sampling time is 10ms, it is 300ppm. At 20ms, it is 150ppm. At 50ms, it is 60ppm. At 100ms, it is 30ppm.
The maximum error of the crystal oscillator is 120ppm + 5ppm per year.
The maximum absolute error: relative error + oscillator error (with a sampling time of 10ms and a service life of less than 16 years) is 500ppm (i.e., 0.05%).
Current limit: Built-in current-limiting sensor power supply.
The maximum length of the on-site cable is 200 meters.

Rated insulation voltage: 50V.
Dielectric test voltage: 500V AC.
Power consumption: 4W.
Current consumption: The +5V module bus is 115mA; +24V external NAMUR = 56 + 0.5× external load (mA); 12V = 89 + 0.7× External load (mA); 24V = 97 + external load (mA).
Diagnostic function: The front panel is equipped with LED indicator lights, including fault (F), operation (R), warning (W), main channel (P), pulse (P) of channels 1-8, and fault (F). It is equipped with process voltage monitoring and loop monitoring functions, and can indicate module errors, module warnings, channel errors and other statuses.
Environment and Certification: Passed CE certification; Comply with electrical safety standards EN 61010-1, UL 61010-1, EN 61010-2-201, UL 61010-2-201; Applicable to hazardous locations C1 Div 2 Culus, C1 Zone 2 Culus, ATEX Zone 2; Obtained the certifications of BV, DNV and LR classification societies.
Operating temperature: 0℃ to + 55℃ (Certification applicable to + 5℃ to + 55℃).
Storage temperature: -40℃ to + 70℃.
Pollution level: Grade 2, in compliance with IEC 60664-1.
Corrosion protection: Complies with ISA-S 71.04: G3.
Relative humidity: 5% to 95%, no condensation.
Protection grade: IP20 according to the IEC 60529 standard.