DP820 | ABB Pulse Counter Supplier
Introduction:
The ABB DP820 two-channel pulse counting module handles incremental pulse transmitters up to 1.5 MHz with RS422 and multiple voltage interfaces.
Customer Reviews
UBEST Automation – Trusted Global Automation Parts Supplier
We offer a wide range of in-stock industrial automation spare parts. All products come with a 12-month warranty and a 30-day refund for quality issues.
Product Attributes:
Notice: For real-time prices and inventory, please click the button below to contact us.
What Is the DP820?
When precise position and speed measurement is critical, the DP820 delivers reliable performance. This ABB pulse counter module features two channels for incremental pulse transmitters up to 1.5 MHz. Each channel includes counters and registers for position, length, and speed or frequency measurement. The module also provides three balanced inputs, one digital input, and one digital output per channel. Pulse transmitters with RS422, +5 V, +12 V, +24 V, and 13 mA interfaces connect directly to the DP820.
Core Specifications
- Two channels for simultaneous pulse count and frequency measurement.
- Bidirectional 29-bit counter for pulse count (length or position).
- Frequency measurement range from 0.25 Hz to 1.5 MHz.
- Signal specification: 24 V d.c. (12–32 V d.c.).
- Input impedance: 2.5 kΩ (DI-input).
- Individually isolated, channel-to-channel and to circuit common.
- Power dissipation: 2.5 W.
- Current consumption: +5 V Modulebus 120 mA.
- Rated insulation voltage: 50 V.
- Dielectric test voltage: 500 V a.c.
- Operating temperature: 0 to +55 °C (+32 to +131 °F).
- Protection class: IP20 according to IEC 60529.
- Dimensions: 45 mm width, 102 mm depth, 119 mm height.
- Weight: 0.15 kg (0.33 lbs).
A standout feature is the simultaneous pulse count and frequency measurement per channel, enabling real-time position and speed tracking without separate modules.
Applications and Use Cases
In industrial automation, the DP820 excels for conveyor belt speed monitoring, rotary encoder position tracking, and length measurement in packaging lines. For example, in a bottling plant, the module counts pulses from an incremental encoder to precisely control fill levels. Its wide input voltage range and RS422 interface make it suitable for noisy environments. Additionally, the module supports marine certifications (ABS, BV, DNV, LR), expanding its use in shipboard systems.
Installation and Setup
Mount the DP820 on an S800 I/O baseplate using compatible Module Termination Units: TU810V1, TU812V1, TU814V1, TU830V1, or TU833. Ensure the keying code CB matches the base. Connect pulse transmitters via the three balanced inputs per channel. Use shielded cables for runs up to 200 meters (218 yards) to maintain signal integrity. The module draws 120 mA from the +5 V Modulebus and requires no external +24 V supply. Verify the operating temperature stays within 0 to +55 °C, and for vertical mounting in compact MTUs, limit ambient temperature to 40 °C.
Maintenance and Reliability
Routine inspection of the DP820 focuses on checking front LED indicators: P(ulse)X, UP (direction), ST(robe), DI, SY(nch), DO, and TP (transm. power OK) per channel. These LEDs provide immediate status of process voltage and channel health. The module supervises process voltage per channel and reports errors via Module Error, Module Warning, and Channel error indications. Keep the environment within pollution degree 2 (IEC 60664-1) and relative humidity 5–95% non-condensing. For corrosion protection, the module meets ISA-S71.04 G3 class. Regular verification of the dielectric test voltage (500 V a.c.) ensures isolation integrity.
Compatibility and Integration
The DP820 integrates seamlessly with ABB S800 I/O systems. It works with MTUs TU810, TU812, TU814, TU830, and TU833. The module is compatible with ABB controllers that support the S800 series. For hazardous locations, it carries cULus Class I Division 2, cULus Zone 2, and ATEX Zone 2 certifications. Marine certifications include ABS, BV, DNV, and LR. The module meets EMC standards EN 61000-6-4 and EN 61000-6-2, ensuring reliable operation in electrically noisy industrial settings.
Frequently Asked Questions
Q: What is the maximum frequency the DP820 can measure?
A: The DP820 measures frequency from 0.25 Hz up to 1.5 MHz.
Q: Can the DP820 handle both position and speed simultaneously?
A: Yes, each channel performs simultaneous pulse count (position/length) and frequency (speed) measurement.
Q: What voltage levels does the DP820 support for pulse transmitters?
A: It supports RS422, +5 V, +12 V, +24 V, and 13 mA interfaces.
Q: What is the power consumption of the DP820?
A: The module dissipates 2.5 W and draws 120 mA from the +5 V Modulebus.
Q: Is the DP820 certified for hazardous locations?
A: Yes, it has cULus Class I Division 2, cULus Zone 2, and ATEX Zone 2 certifications.
Product Support and Availability
The ABB DP820 is available from PetroPartsOnline. In stock and ready to ship, it comes with full technical support. Contact PetroPartsOnline for current lifecycle status and ordering details.