Application Scenarios
A petrochemical plant operating an ABB Symphony Plus–based DCS experienced a sudden failure on a remote I/O station where the local alarm horn and trip-contactor commands stopped responding—yet the analog measurements from the same station remained operational. Diagnostics confirmed the communication link was healthy, but the local output board—the ABB 1KHL045107R1 (P4LR Board) —had failed. The maintenance team powered down the rack, extracted the faulty board, inserted a verified replacement ABB 1KHL045107R1, reseated the backplane connector, and restored power. Within minutes, the alarm and trip outputs were functioning again—no point-table changes, no controller downloads required. The plant avoided an estimated four hours of unplanned downtime and potential production losses exceeding $50,000.
This case illustrates a critical pain point solved by the ABB 1KHL045107R1: it is a straightforward, swap-and-go replacement board whose correct operation is essential for translating DCS logic into real-world action. For plants running legacy ABB control systems, having verified spares of this board is not optional—it is a necessity for minimizing MTTR during unscheduled outages.
Parameters
| Main Parameters | Value/Description |
|---|---|
| Product Model | 1KHL045107R1 (P4LR Board) |
| Manufacturer | ABB |
| Product Category | Control / Communication Interface Board (P4LR Series PWA) |
| Typical Use | DCS I/O station local control, relay/digital output driving, signal conditioning |
| Supply Voltage | 24 V DC (typical, from rack backplane or external PSU) |
| Current Consumption | ≤ 0.3 A typical |
| Communication Interface | RS-485 (Modbus RTU / proprietary DDCS-like framing) |
| I/O Capability | Config-dependent — typically 8–16 digital inputs and/or relay/digital outputs |
| Isolation | Optical isolation on I/O channels (typical 1500–2500 V AC) |
| Status Indication | Onboard LEDs for Power (PWR), Comms Activity (TX/RX), Run/Fault |
| Operating Temperature | -20 °C to +60 °C |
| Storage Temperature | -40 °C to +85 °C |
| Mounting Method | Rack slot / card guide insertion with backplane edge connector |
| Protection Class | IP20 (for installation inside enclosed control cabinet) |
| Dimensions (approx.) | 172 × 94 × 56 mm (varies slightly by revision) |
| Weight (approx.) | 0.35–0.45 kg |
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