ABB 1KHW001432R0001 (P3LG): 1500 V AC Isolation, 5 A Relay Output, Modbus RTU/DeviceNet Ready

Product Overview

The ABB 1KHW001432R0001, catalog-shortened to P3LG, is an active drive / control circuit board built around a 32-bit DSP core and positioned in ABB’s P3LG platform—a family of compact, DSP-driven interface boards that sit between the control-layer strategy and the cabinet’s power-side actuators. Where the earlier P4LG​ (1KHJ044010R0001) we covered is a passive carrier—copper, gold fingers, and a seat for someone else’s daughtercard—the ABB 1KHW001432R0001​ is the opposite: it is the brains and the driver. Onboard the P3LG​ you get 24 V DC ±10% power input, 32-bit DSP for real-time algorithm execution, PWM generation tunable from 2 kHz to 16 kHz, 0–10 V or 4–20 mA analog inputs, 24 V DC digital inputs, and relay outputs rated 5 A @ 250 V AC / 30 V DC, with 1500 V AC isolation between I/O and the system side.The board is physically small—roughly 100 × 80 × 20 mm, 0.38 kg—and specified IP20 for cabinet interior mounting, with an operating window of -10°C to +50°C (derate above 40°C, per the datasheet convention). Some batches carry 2 MB Flash (with 16/32 MB variants reported depending on procurement window) and SRAM, and the communication side offers RS-485 carrying Modbus RTU, with Modbus TCP / DeviceNet configurable per build. That communication detail is the reason the ABB 1KHW001432R0001​ gets called a “small cerebellum” in drive cabinets: it can close a local loop—sense, decide, drive—without a full PLC rack behind it, which is exactly why OEM skids and ABB drive cabinets standardize on it.For maintenance teams, the P3LG​ has one behavioural quirk worth flagging up front: it is firmware-sensitive. Swapping a ABB 1KHW001432R0001​ into a node that expects a different firmware stepping will throw a “Config Mismatch” and the board will not go active until the image aligns. That makes the 1KHW001432R0001​ less “grab any spare off the shelf” and more “grab the right stepping off the shelf”—a point the product-guarantee and install sections will come back to. In the hierarchy of an ABB drive or P3LG-adjacent node, the ABB 1KHW001432R0001​ is the board you notice only when the valve stops stroking, the pump contactor won’t pull in, or the drive cabinet flashes a board-level fault and the line stops. Keeping one that matches your node’s firmware is the difference between a 20-minute swap and a 4-hour “why won’t it boot” session.

Technical Specifications