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.
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