Product Details
Configured for pulse frequency counting and accumulation tasks in ABB 800xA distributed control networks, the ABB DP840 3BSE028926R1 (DP840 Pulse Counter Module) provides direct physical/electrical execution across 8 isolated field input channels.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | DP840 (3BSE028926R1) |
| Brand | ABB |
| Origin | Sweden |
| Weight | 0.15 kg |
| Dimensions | 45 mm x 102 mm x 119 mm |
| Operating Temp | 0 to 55 deg C |
| Power Consumption | 4 W maximum power dissipation |
| Channels | 8 pulse counting channels |
| Nominal Voltage | 24 VDC (19.2 to 32 VDC range) |
| Modulebus +5 V Current | 115 mA |
| External 24 V Current | 97 mA + external load |
| Isolation | Groupwise isolated from ground (50 V rated insulation, 500 VAC dielectric test) |
| Maximum Field Cable | 200 meters |
| Accuracy Error | Max absolute error 500 ppm at PRIT = 10 ms (oscillator drift 120 ppm + 5 ppm/year) |
| Compatibility | S800 I/O MTUs: TU810, TU812, TU814, TU818, TU830, TU833, TU842, TU843, TU844, TU845, TU852, TU854 |
Backplane Bus Communication Velocity and I/O Density Scaling
The DP840 module interface maintains deterministic Modulebus communication velocity, allowing high-density pulse train processing without degrading backplane scanning cycles. Integrated hardware counters offload high-frequency pulse calculation from the primary AC 800M controller CPU, enabling scalable I/O density scaling across redundant S800 I/O clusters. Firmware flash compatibility ensures consistent channel supervision and process voltage diagnostic reporting through standard ABB 800xA control software libraries.
Frequently Asked Questions
Q: Does the DP840 module support redundant configuration in S800 I/O racks?
A: Yes, the DP840 supports hardware redundancy when paired with redundant Module Terminal Units such as the TU842, TU843, TU844, or TU845.
Q: What is the maximum permitted field cable distance for pulse inputs on this card?
A: The maximum field cable length for input pulse wiring is limited to 200 meters.
Q: How does the internal power distribution behave when supplying power to field sensors?
A: The DP840 provides built-in current-limited sensor power outputs on each input channel to prevent localized short circuits from affecting the backplane logic power supply.
Field Installation Guidelines
- Confirm the mechanical keying code CF matches the designated slot position on the Module Terminal Unit (MTU) before insertion.
- Disconnect Modulebus power and process voltage feeds prior to inserting or removing the DP840 module from the MTU baseplate.
- Align the module housing with the locking guide rails of the MTU and press firmly until the locking mechanism clicks into position.
- Ensure signal wiring cable shields are grounded at the field cable termination bar using low-impedance grounding clamps.
- Verify process voltage levels (19.2 to 32 VDC) on external terminals before energizing the module.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Understanding Marshalling Cabinets in Industrial Control Systems Architecture
Industrial control system deployments rely on structured signal distribution to bridge field instrumentation with central processing hardware. A marshalling cabinet serves as the vital intermediate connection point between heavy field home-run multi-pair cables and delicate input/output (I/O) modules housed inside Programmable Logic Controller (PLC) or Distributed Control System (DCS) enclosures. By segregating field cable terminations from control hardware, engineers maintain system flexibility, safeguard controller components, and streamline commissioning workflows.
FAT vs SAT in Industrial Control Systems: Key Differences and Execution Guide
Industrial control system deployment relies on strict verification protocols to guarantee operational safety, system stability, and regulatory compliance. Commissioning complex Programmable Logic Controller (PLC) racks, Distributed Control Systems (DCS), and Safety Instrumented Systems (SIS) requires two critical milestones: the Factory Acceptance Test (FAT) and the Site Acceptance Test (SAT). Both procedures validate that system automation meets design specifications, but they occur at different stages of project execution and target distinct operational risks.
Hub vs Switch vs Router in Industrial Automation Architecture
Modern factory automation relies on reliable industrial networking infrastructure to exchange real-time field data across operational technology systems. Engineers often encounter networking hardware like hubs, switches, and routers when integrating Programmable Logic Controllers, Distributed Control Systems, and SCADA monitoring nodes. Although these devices share physical ports, they operate at different layers of the Open Systems Interconnection reference model and deliver distinct traffic management capabilities.