Overview

The AEP7D-25 is a high-capacity Primary Power Supply Bus Unit engineered for the Yokogawa CENTUM VP system architecture. It manages power distribution across multiple ports with a maximum total input current of 20 A and a localized port limit of 6 A. Operating within a 220 to 240 V AC range, the AEP7D-25 provides superior electrical isolation with a 1500 V AC withstanding voltage. This unit is essential for ensuring stable, high-current power delivery to field control stations and I/O modules in non-hazardous industrial environments.

Configuration Breakdown & Suffix Architecture

The AEP7D-25 follows a modular identification system. Each suffix defines the electrical and safety constraints of the hardware:
AEP7D (Base Model: Primary Power Supply Bus Unit)
└── -2 (Power Input Suffix)
│ └── 220 – 240 V AC Input Range
└── -5 (Protection Suffix)
└── Basic Type (No Explosion Protection)

Technical Specifications

• Brand: Yokogawa
• Full Model: AEP7D-25
• Input Voltage: 220 to 240 V AC
• Total Max Input Current: 20 A
• Maximum Current per Port: 6 A
• Isolation Strength: 1500 V AC Withstanding Voltage
• Unit Weight: Approx. 1.8 kg
• System Integration: CENTUM VP / FIO Compatible

Performance & Safety Features

• High-current capacity supports dense I/O configurations without voltage drops.
• Integrated bus protection ensures power stability across all downstream ports.
• Robust 1500V isolation prevents electrical surges from damaging control hardware.
• The AEP7D-25 design facilitates clean cable management in power cabinets.
• Optimized for non-explosion protection areas requiring high-reliability AC supply.

Logistics & Warranty

• Warranty Coverage: 12 Months Warranty
• Global Logistics: FedEx, UPS, DHL
• Package Condition: Brand New & Original Factory Packing
• Shipment: Securely crated for international delivery

Professional Engineering FAQ

What is the maximum number of modules I can power with one AEP7D-25?

While the AEP7D-25 supports a total of 20 A, you must ensure that no single port exceeds 6 A. Calculate the peak current draw of each connected module to ensure the 20 A total limit is maintained.

Can the AEP7D-25 be used in 110V AC systems?

No. The “-2” suffix specifically limits this unit to the 220 to 240 V AC range. For 110V systems, a different suffix model must be selected to avoid internal component damage.

How does the withstanding voltage rating benefit my installation?

The 1500 V AC rating indicates that the AEP7D-25 can withstand significant temporary voltage spikes. This is a critical engineering safety margin for plants with heavy motor switching or unstable power grids.

Selection Guidance: When should I choose the -5 suffix?

The -5 suffix represents the Basic type. You should select the AEP7D-25 only for safe-area control rooms. If your power bus is located in a Zone 2 or Div 2 hazardous area, an explosion-proof variant is required.

Are there any specific maintenance requirements for this power bus unit?

The AEP7D-25 is a static distribution unit. However, as it handles up to 20 A, we recommend an infrared thermal inspection of the terminal connections annually to prevent overheating from loose wiring.