Product Core Brief
- Model:
- Full OEM Part Code: 3BHE004573R0043
- Brand: ABB
- Series: UFC760 AC 800M CPU family for ABB System 800xA DCS
- Core Function: Execute real-time PID loops, discrete interlock logic, and local I/O data processing for small-to-medium control racks; handle single Ethernet plant backbone communication and RS232 local commissioning.
- Product Type: Single-slot hot-swappable basic single-Ethernet CPU processing module
- Key Specs: Single 10/100 Mbps Ethernet port | RS232 service port | G3 full conformal coated PCB | Supports S800 series I/O bases ⚠️ EOL — limited surplus stock remaining
Product Introduction
The ABB 3BHE004573R0043 is a low-cost basic AC 800M controller designed for compact skid, auxiliary boiler, and small turbine control racks within System 800xA distributed systems. It relies on the rack internal backplane bus to exchange analog/discrete signals with S800 I/O modules and only features one Ethernet port for non-redundant plant network connectivity.This unit differs from the dual-Ethernet UFC760BE1142 variant by omitting redundant network hardware, targeting non-critical auxiliary loops that do not require fault-tolerant backbone failover. OEM field logging records a 57,000 hour MTBF under steady 50 °C cabinet runtime, consistent with standard UFC760 series reliability.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Compatible DCS Platform | ABB System 800xA AC 800M rack backplanes; fully interoperable with all S800 analog/discrete I/O terminal bases |
| Official Full Part Number | 3BHE004573R0043 (short designation ) |
| Operating Supply Voltage | 24 VDC ±20% rack backplane feed; 400 mA typical steady-state draw |
| Communication Interfaces | 1 × 10/100 Mbps RJ45 Ethernet TCP/IP plant bus; 1 × isolated RS232 local service port for Control Builder commissioning |
| PCB Environmental Protection | Full G3 conformal coating, resistant to dust, moisture and mild corrosive industrial cabinet atmospheres |
| Hot Swap Compliance | ABB System 800xA certified hot-swap; rack internal I/O fieldbus maintains operation during card replacement |
| Onboard Diagnostics | Continuous RAM/ROM self-test, Ethernet link loss alarm, backplane undervoltage monitoring, watchdog fault reset |
| Mechanical Form Factor | Single-width DIN rail rack slot, standard UFC760 card housing |
| Mechanical Dimensions | 130 mm L × 70 mm W × 125 mm D |
| Net Unit Weight | 0.44 kg |
| Continuous Operating Ambient Temp | -20 °C to +60 °C full rated control performance; linear derate above 60 °C |
| Storage Temperature Range | -40 °C to +85 °C, 5–95 % RH non-condensing |
| Integrated Protection Circuits | Backplane reverse polarity lockout, Ethernet port ESD surge clamping, hardware watchdog automatic fault recovery |
| Certifications | UL, CE, RoHS, EN61000 Class A industrial EMC filtering for power generation and chemical plants |
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: Cross-reference serial numbers against ABB OEM trace databases; inspect conformal coating for chipping, gold rack edge connectors for oxidation, Ethernet port pin headers for bending. Photograph the edge connector pinout for auxiliary control cabinet wiring reference.
- Live Functional Test: Seat the unit into a populated System 800xA test rack paired with mixed S800 AI/DI/AO/DO I/O modules; run a continuous 24-hour cyclic PID and interlock logic test with simulated 4–20 mA transmitters and dry contact inputs. Log backplane supply voltage stability with a Fluke 115 digital multimeter for the full test duration.
- Electrical Parameter Test: Perform a 500 V Megger insulation resistance test between all communication field circuits and module chassis ground; pass threshold set at >10 MΩ. Verify RS232 local commissioning communication maintains stable link at maximum baud rate.
- Firmware Verification: Read and record factory UFC760 CPU firmware revision via ABB Control Builder engineering software; document default Ethernet IP subnet and RS232 baud rate register settings for site commissioning reference.
- Final QC & Packaging: Wipe gold edge connectors to remove surface oxidation; seal the unit inside an anti-static foam bag, affix a dated QC Pass label listing all completed communication, self-test, and insulation test metrics before rigid shock-resistant carton packing.
Replacement Pitfall Guide
❗ ❗ Partial Chassis Slot Insertion Risk: Uneven card seating creates high-resistance edge contact points that throttle Ethernet throughput and delay PID loop execution during auxiliary process heat transients. Push the card fully into the slot and engage front locking latches flush against the rack faceplate.❗ Ethernet Cable Shield Ground Misconfiguration Risk: Unshielded CAT5e trunk wiring routed parallel to high-current generator excitation cabling injects EMI noise that causes intermittent DCS data loss. Use factory shielded Ethernet assemblies, terminate shield ground at only the main DCS cabinet terminal block end.❗ ❗ Uncontrolled ESD Damage Risk: Dry auxiliary control room air builds static charge rapidly. Touch a grounded anti-static mat for three full seconds before handling the gold edge connector; ungrounded contact destroys low-tolerance Ethernet transceiver ASICs.Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
Compatibility Matrix
- UFC760BE1142 dual redundant Ethernet CPU → : Needs Adaptation — full DCS control logic rewrite required to remove redundant network fault interlock routines
- ABB standard UFC760 AC 800M rack backplane → : Direct — factory edge pinout natively matches rack 24 V logic supply and internal S800 I/O fieldbus routing
- ABB series analog/discrete I/O terminal bases → : Direct — CPU reads/writes all analog and discrete field signals over the rack internal backplane bus
- VM310 24 V cabinet auxiliary power supply → : Direct — regulated 24 V output falls within the module’s ±20% operating voltage window without extra voltage conditioning
- CML40.2-SP-330-NA-NNNN-NW Rexroth SERCOS motion PLC → : Needs Adaptation — wire module global CPU fault dry contacts to PLC digital inputs, map auxiliary loop process registers via Modbus TCP gateway bridging the single Ethernet backbone
