Description
ABB IEPAS02 – Product Overview
The IEPAS02 is a dedicated power module for ABB’s Bailey INFI 90 and Net 90 distributed control systems. Within a DCS architecture it occupies the power distribution tier, delivering a clean 24 VDC rail to CPUs, I/O racks, communication cards, and safety instrumented subsystems. The module accepts a wide range AC input (115 VAC – 230 VAC, 47 – 63 Hz) and internally converts it to a low ripple DC output that meets the stringent stability requirements of process control loops.
Its design follows the modular philosophy of the INFI 90 family: the unit mounts on a standard DIN rail or directly on the control cabinet backplane, and it can be hot swapped in a properly configured system, minimizing plant downtime during maintenance. The IEPAS02 also integrates two Ethernet ports with built in switching, allowing it to serve as a local data highway node while maintaining power continuity.
ABB IEPAS02 – Technical Specifications
Model Number: IEPAS02
Manufacturer: ABB
Product Type: Modular AC DC Power Supply
Input Voltage: 115 VAC / 230 VAC, 47 – 63 Hz
Output Voltage: 24 VDC (fixed)
Output Current: 2 A (typical) – 3 A (maximum)
Power Rating: 48 W (typical) – 72 W (maximum)
Efficiency: > 85 % (typical)
Operating Temperature: –20 °C to +70 °C
Storage Temperature: –40 °C to +85 °C
Relative Humidity: 5 % to 95 % non condensing
Protection Rating: IP20 (non ingress)
Dimensions: 140 mm × 60 mm × 30 mm (≈ 5.5 in × 2.4 in × 1.2 in)
Weight: 0.5 kg (≈ 1.1 lb)
Mounting: DIN rail or backplane (standard 35 mm spacing)
Connector Type: Screw type terminal blocks (rated for 24 VDC)
Communication Ports: Two Ethernet ports (10/100 Mbps, built in switch)
ABB IEPAS02
Core Features & Customer Value
Wide Input Voltage Range – Accepting both 115 VAC and 230 VAC allows the same module to be used on plants with differing utility standards, reducing inventory complexity and simplifying field spares management.
Regulated 24 VDC Output with Low Ripple – The DC rail meets the tight tolerance (± 0.5 %) required by DCS processors and safety instrumented subsystems, helping to maintain signal integrity and avoid spurious trips in safety logic.
Built In Protection – Over current, over voltage, and short circuit detection shut the module down before damage can propagate, protecting downstream equipment and decreasing the likelihood of costly field repairs.
Integrated Ethernet Switching – Two Ethernet ports provide local network redundancy without additional hardware, enabling seamless integration into the DCS data highway and supporting hot swap operations that keep the control system online during power module replacement.
Modular, Hot Swappable Design – The DIN rail form factor and hot swap capability allow maintenance personnel to replace a failed power module without shutting down the entire control system, thereby improving plant availability and reducing mean time to repair (MTTR).
Compact Footprint and Light Weight – At 140 × 60 × 30 mm and 0.5 kg, the IEPAS02 fits easily into existing cabinet layouts, freeing space for additional I/O or communication cards and minimizing mechanical load on mounting structures.
ABB IEPAS02
Typical Applications
Process Control Power Distribution – In a pulp and paper mill, the IEPAS02 supplies the main DCS CPU and distributed I/O racks, ensuring stable operation of temperature, pressure, and flow control loops that run continuously 24/7.
Safety Instrumented System (SIS) Power Feed – For a petrochemical plant’s emergency shutdown system, the module provides a reliable 24 VDC source to safety PLCs and valve actuators, meeting IEC 61511 power quality requirements.
Remote Terminal Unit (RTU) Power – In a water treatment facility, the IEPAS02 powers remote RTUs located in harsh outdoor cabinets; its wide temperature range and IP20 rating allow it to operate reliably despite temperature swings and dust exposure.
Redundant Ethernet Node – In a combined cycle power plant, the dual Ethernet ports are used to create a ring topology for the DCS data highway, providing path redundancy without additional switches.
