وصف

Yokogawa AEP7D-20 Primary Power Supply Bus Unit

The Yokogawa AEP7D-20, also cataloged as the AEP7D Primary Power Supply Bus Unit, operates as a dedicated hardware component for distributing primary AC power across CENTUM VP and CENTUM 3000 series DCS cabinets, ensuring dual-line redundancy and uninterrupted power delivery.

Hardware Specifications

Parameter	Specification
ModelBrand	AEP7D-20
Origin	Japan
Weight	Approx. 1.8 kg
Dimensions	Standard Yokogawa cabinet mounting (vertical type)
OperatingTemp	0 degC to 55 degC (typical industrial range)
PowerConsumption	Dependent on load; Max input current 20 A total, 6 A per port
InputVoltage	220 V AC to 240 V AC (±10%)
InputFrequency	50 / 60 Hz (±3 Hz)
WithstandingVoltage	1500 V AC
OutputPorts	Up to 14 connections (parallel setups)

DCS Power Distribution Features

• Supports dual-redundant input lines (Line A and Line B) for uninterrupted operation.
• Independent maintenance for each line without halting system functions.
• Channel-to-channel isolation minimizes interference between power distribution paths.
• High-density bus design allows multiple sub-ports while maintaining voltage stability.
• Built-in cold junction compensation ensures voltage reference stability under temperature variations.

Frequently Asked Questions

Q: Can the AEP7D-20 be hot-swapped without shutting down the DCS?
A: Hot-swap is not recommended for the AEP7D-20; maintenance should be performed on one line while the redundant line remains active.

Q: What is the maximum load per output port?
A: Each output port is rated for 6 A maximum; total unit load should not exceed 20 A.

Q: Are firmware updates required for this power supply unit?
A: The AEP7D-20 operates as a hardware bus unit without embedded firmware; no firmware updates are necessary.

Field Installation Guidelines

• Mount vertically in standard Yokogawa cabinets (AFV40 series or ACB51).
• Ensure proper grounding of all input and output terminals to reduce electrical noise.
• Maintain separation between Line A and Line B cabling to preserve isolation.
• Verify that all sub-port connections do not exceed rated per-port current.
• Follow standard industrial practice for cabinet ventilation to maintain operating temperature below 55 degC.

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