AEP7D-25 Yokogawa CENTUM VP Datasheet & Technical Manual

Yokogawa AEP7D-25 CENTUM VP Primary Power Supply Bus Unit

Description Reviews

Yokogawa AEP7D-25 CENTUM VP Primary Power Supply Bus Unit

Configured for discrete power routing in CENTUM VP / CS 3000 FIO System platforms, the Yokogawa AEP7D-25 (AEP7D Primary Power Supply Bus Unit) provides direct physical/electrical execution. The hardware operates as a centralized distribution rail assembly, processing raw input electricity to feed secondary logic and I/O subassemblies through a dual-input architecture. It functions via segregated power paths designated as lines A and B to maintain complete branch isolation while driving downstream control nodes.

Suffix Breakdown & Model Matrix

Model AEP7D: Primary Power Supply Bus Unit Architecture
Suffix -2: 220 to 240 V AC Power Input Configuration
Suffix -5: Basic Design Type (Standard environmental compliance without explosion-proof rating barriers)

Hardware Specifications

Parameter	Specification
Model	AEP7D-25
Brand	Yokogawa
Platform	CENTUM VP / CS 3000 FIO System
Origin	Japan
Weight	1.8 kg (Configuration range: 1.8 to 3.0 kg)
Dimensions	482.6 x 43.6 x 187 mm (1U Rack-mount footprint)
Operating Temp	0 to 55 deg C
Power Consumption	Passive power distribution matrix
Input Voltage Option	220 to 240 V AC (Wide-range support: 100 to 240 V AC, 50/60 Hz)
Max Input Current (Unit)	20 A (AC aggregate rating)
Max Input Current (per port)	6 A
Outputs	7 outputs per input line (A and B); 14 total outputs
Output Voltages Distributed	5 V DC logic rails / 24 V DC I/O loops
Ripple & Noise	< 40 mVp-p
Isolation/Withstanding Voltage	1500 V AC for 1 minute between terminal banks and frame
Protection Mechanisms	Overcurrent and short-circuit with automatic cut-off and recovery
Cooling Profile	Natural convection
Ambient Humidity	5 to 95% RH (non-condensing)

Process Control Loops and DCS Instrument Integration

The module manages distributed power rails intended for devices functioning on the 4-20 mA HART loop protocol, ensuring consistent source potential across multi-channel analog networks. By utilizing internal copper partitioning, the layout implements strict channel-to-channel isolation parameters to block transient line spikes from crossing over into parallel logic banks. This architecture stabilizes the continuous references required by analog input processing blocks and adjacent cold junction compensation units, suppressing power-frequency interference across the DCS environment.

Frequently Asked Questions

Q: What occurs during an overcurrent event on an individual output port?

A: The internal protection network executes an automatic cut-off of the overloaded branch circuit. Once the fault condition is cleared and the junction temperature stabilizes, the hardware initiates automatic recovery to restore current flow.

Q: Can line A and line B inputs be operated in a parallel configuration?

A: Yes. The hardware supports a dual-input parallel setup, allowing the full deployment of all 14 output ports under a single unified power bus architecture.

Q: Is this specific variant rated for installation within explosive hazardous areas?

A: No. The AEP7D-25 utilizes the suffix -5 basic design profile, meaning it lacks intrinsic safety barriers or explosion protection certifications and must be placed within non-hazardous control room environments.

Field Installation Guidelines

Cabinet Mechanical Mounting: Mount the unit inside the 19-inch DCS rack frame using M5 pan-head screws, maintaining proper alignment to eliminate chassis strain on internal bus connectors.
Cabinet Earthing Protocol: Terminate a low-impedance ground conductor directly from the dedicated chassis ground lug to the primary instrumentation earth busbar of the cabinet.
Cable Routing Barriers: Maintain physical separation between incoming 220-240 V AC lines and low-voltage DC signal cables to inhibit electromagnetic cross-induction.
Thermal Management Clearances: Ensure unhindered vertical path spacing above and below the module to permit natural convection airflow through the rack housing.

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