1. General Introduction
The DP840 module consists of 8 identical independent channels. Each channel can be used for pulse count or frequency (speed) measurement, maximum 20 kHz. The inputs can also be read as DI signals. Each channel has a configurable input filter. The module performs self-diagnostics cyclically. With advanced diagnostics, for single or redundant applications. Interface for NAMUR, 12 V and 24 V. The input can be read as digital input signals.
Use DP840 with Module Termination Units TU810V1, TU812V1, TU814V1, TU830V1, and TU833.
2. Specification of DP840
General info | |
Type | Pulse counter |
Signal specification | 24 V d.c. (12 - 32 V d.c.) |
Article number | 3BSE028926R1 |
Number of channels | 8 |
HART | No |
SOE | No |
Redundancy | No |
High Integrity | Yes |
Intrinsic safety | No |
Mechanics | S800 |
Detailed data | |
Isolation | Individually isolated, channel-to-channel and to circuit common |
Error | Max relative error (4): PRIT = 10 ms: 300 ppm PRIT = 20 ms: 150 ppm PRIT = 50 ms: 60 ppm PRIT = 100 ms: 30 ppm Max error in crystal oscillator: 120 ppm + 5 ppm/year Max absolute error = rel. error + oscillator error (PRIT = 10 ms, age < 16 year): 500 ppm (= 0.05%) |
Current limiting | Built in current limited sensor power |
Maximum field cable length | 200 meters (218 yards) |
Rated insulation voltage | 50 V |
Dielectric test voltage | 500 V a.c. |
Power dissipation | 4W |
Current consumption +5 V Module bus | 150mA |
Current consumption +24 V external | NAMUR = 56 + 0.5 x external load [mA] 12 V = 89 + 0.7 x external load [mA] 24 V = 97 + external load [mA] |
Diagnostics | |
Front LED’s | F(ault), R(un), W(arning), P(rimary), Channel 1-8 P(ulse) and F(ault) |
Supervision | Process voltage Loop supervision |
Status indication of supervision | Module Error, Module Warning, Channel error |
Environmental and certification | |
CE mark | Yes |
Electrical safety | IEC 61131-2, cFMus |
Hazardous location | ATEX/IECEx Zone 2 with interface to Zone 0, cFMus C1, Div 2/Zone 2 with interface to C1, C2, C3 Div 1/Zone 0 |
Marine certification | BV, DNV-GL, LR |
Protection rating | IP20 according to IEC 60529 |
Corrosive atmosphere ISA-S71.04 | G3 |
Climatic operating conditions | 0 to +55 °C (Storage -25 to +70 °C), RH=5 to 95 % no condensation, IEC/EN61131-2 |
Pollution degree | Degree 2, IEC 60664-1 |
Mechanical operating conditions | IEC/EN 61131-2 |
EMC | EN 61000-6-4 and EN 61000-6-2 |
Overvoltage categories | IEC/EN 60664-1, EN 50178 |
Equipment class | Class I according to IEC 61140; (earth protected) |
Max ambient temperature | 55 °C (131 °F), for vertical mounting 40 °C (104 °F) |
RoHS compliance | DIRECTIVE/2011/65/EU (EN 50581:2012) |
WEEE compliance | DIRECTIVE/2012/19/EU |
Comp ability | |
Use with MTU | TU810, TU812, TU814, TU818, TU830, TU833, TU842, TU843, TU844, TU845,TU852, TU854 |
Keying code | CF |
Dimensions | |
Width | 45 mm (1.77”) |
Depth | 102 mm (4.01”), 111 mm (4.37”) including connector |
Height | 119 mm (4.7”) |
Weight | 0.15 kg (0.33 lbs.) |
3. Selection table of Pulse counters
Name | HART | High Integrity | Intrinsic safety | Mechanics | Redundancy | SOE | Type |
DP820 | No | No | No | S800 | No | No | Pulse counter |
DP840 | No | No | No | S800 | Yes | No | Pulse counter |
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