Yokogawa AEP7D-25 Primary Power Supply Bus Unit – Product Description

Overview

The Yokogawa AEP7D-25 is a primary power supply bus unit engineered for industrial control systems. It distributes regulated power from dual independent sources to multiple outputs, ensuring uninterrupted and redundant delivery to controllers, I/O modules, and subsystems. Moreover, its compact rack-mount design and built-in protection mechanisms provide reliable operation in mission-critical automation environments. This unit integrates seamlessly with Yokogawa CENTUM VP and other DCS platforms, supporting high-performance industrial applications.

Technical Specifications

General Information

• Model: AEP7D-25

• Type: Primary Power Supply Bus Unit

• Function: Distributes regulated DC power to controllers and I/O modules

• Manufacturer: Yokogawa

• Condition: New, original

• Origin: Japan

• Certification: IEC/EN EMC and safety standards

Electrical

• Input Voltage: 100–240 V AC, 50/60 Hz; 24 V DC variant available

• Maximum Input Current (Unit): 20 A (AC), 30 A (DC)

• Maximum Input Current (Per Port): 6 A (AC), 10 A (DC)

• Output Ports: 7 sets per input source (14 total with parallel inputs)

• Output Voltages: 5 V DC (logic), 24 V DC (I/O)

• Maximum Output Current: 20 A per bus line

• Ripple & Noise: < 40 mV peak-to-peak

• Protection: Overcurrent and short-circuit with automatic cut-off and recovery

• Redundancy: Dual/parallel input configuration supported

Mechanical

• Mounting: Rack installation inside DCS cabinet

• Dimensions (W × H × D): 482.6 × 43.6 × 187 mm

• Weight: 1.8–3.0 kg depending on configuration

• Cooling: Natural convection

Environmental

• Operating Temperature: 0 °C to +55 °C

• Storage Temperature: −20 °C to +70 °C

• Relative Humidity: 5–95% non-condensing

FAQ

Q1: What input voltages are supported by the AEP7D-25?
It supports 100–240 V AC and 24 V DC variants depending on the suffix code.

Q2: How much current can each bus line handle?
Each bus line can deliver up to 20 A to connected modules.

Q3: Does it support redundancy?
Yes. Dual-input parallel configurations provide uninterrupted power during single-source failure.

Q4: What protections are built into the unit?
It includes overcurrent and short-circuit protection with automatic cut-off and recovery.

Q5: Can it be installed in standard DCS cabinets?
Yes, the unit is rack-mounted and designed for seamless integration into Yokogawa DCS systems.