Overview
Configured for deterministic backplane data routing and digital signal computation in ABB industrial automation platforms, the ABB DSPP4LQ HENF209736R003 (base model DSPP4LQ exchange processor board unit) provides direct physical and electrical execution of real-time control tasks.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Brand / Manufacturer | ABB |
| Model / Type | DSPP4LQ |
| Part Number | HENF209736R003 |
| Product Type | Exchange Processor Board Unit / Communication Processor |
| Power Supply | 24 VDC |
| Communication Protocols | Modbus TCP/IP, Ethernet (Profinet/EtherNet/IP capable) |
| I/O Configuration | 4 Digital Inputs, 4 Digital Outputs (24 VDC) |
| Operating Temperature | -20 degC to +60 degC |
| Storage Temperature | -40 degC to +85 degC |
| Dimensions | 278 mm x 195 mm x 60 mm |
| Weight | 0.5 kg to 1.5 kg |
| Origin | Sweden / Estonia |
Backplane Bus Communication Velocity Licensing
The DSPP4LQ enforces strict backplane bus arbitration cycles aligned with ABB’s licensed communication velocity profiles. Deterministic packet transfer timing is maintained through fixed-slot scheduling, preventing jitter across multi-node rack assemblies. Firmware flash compatibility is enforced at the hardware level to ensure that only certified binary images execute on the onboard processor. Unauthorized code uploads are blocked by electrically isolated write-protect logic tied directly to the backplane connector pins.
Frequently Asked Questions
Q: Can the DSPP4LQ be hot-swapped while the rack remains powered?
A: No. The module must be installed or removed only after confirming the rack power supply is disconnected to avoid backplane transceiver damage.
Q: What is the typical backplane current draw of the DSPP4LQ?
A: Under full load with active communication, the module draws approximately 1.2 A at 24 VDC from the backplane power bus.
Q: Is firmware from other ABB processor boards interchangeable with the DSPP4LQ?
A: No. Firmware images are bound to the specific hardware identification code stored in non-volatile memory; cross-loading will result in boot failure.
Field Installation Guidelines
Mount the DSPP4LQ directly into the designated slot of the compatible ABB rack assembly. Ensure all DIN rail or chassis mounting points are torqued to manufacturer specifications. Use shielded twisted-pair cabling for all Ethernet connections, grounding the shield at the rack end only. Maintain minimum separation of 75 mm between high-voltage power wiring and signal lines to reduce EMI coupling. Verify gap-free seating of the module into the backplane connectors before applying power.
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