Description

Yokogawa AEA4D-01 Terminal Board

The Yokogawa AEA4D-01, also cataloged as the AEA4D Terminal Board, operates as a dedicated hardware component for analog signal interfacing within CENTUM and ProSafe-RS systems. It provides physical termination and routing for field instruments to Yokogawa FIO modules, supporting both single and dual-redundant I/O configurations.

Hardware Specifications

Parameter	Specification
ModelBrand	Yokogawa AEA4D-01
Origin	Japan
Weight	1.5 kg
Dimensions	Dual-row vertical terminal block, standard panel mount
OperatingTemp	-20 degC to +70 degC
AmbientHumidity	5% to 95% RH (non-condensing)
TerminalScrewType	M4 Screw Terminals
ChannelCapacity	16 channels (8 points x 2 blocks)
SignalConfiguration	Single or dual-redundant analog
InsulationResistance	≥ 100 MOhm at 500 VDC
WithstandingVoltage	500 VAC for 1 minute
ConnectionCable	Yokogawa KS1 signal cable
MountingMethod	19-inch rack or panel with 4 x M5 screws

Process Control DCS Features

The AEA4D-01 supports 4-20 mA HART loop protocol and maintains channel-to-channel isolation for noise suppression. Cold junction compensation (CJc) is applied internally to reduce temperature-induced drift. Dual-redundant port architecture enables uninterrupted signal routing during FIO module replacement or failure, maintaining DCS operational integrity.

Frequently Asked Questions

Q: VnA: Can the AEA4D-01 support hot-swap of FIO modules?
A: Yes, field wiring remains undisturbed, and module replacement can be conducted without powering down the I/O rack.

Q: VnA: What is the maximum cable length for connecting field instruments?
A: Standard Yokogawa KS1 cable specifications should be followed; length is determined by analog signal attenuation and noise margin.

Q: VnA: Is surge protection integrated?
A: No, the standard suffix (-0/-1) models are supplied without surge absorbers; external protection must be implemented if required.

Field Installation Guidelines

• Mount the terminal board on a standard 19-inch rack or panel using 4 x M5 screws.
• Connect field instrument cables using M4 screw terminals ensuring torque per industrial standards to maintain gas-tight contact.
• Maintain separation of analog signal cables from power lines to prevent electromagnetic interference.
• Ground shielding at one end only to avoid ground loops.
• Verify dual-redundant port connections when configuring for hot-standby operation.
• Avoid mechanical stress on cables during installation to prevent signal degradation.

Specifications

• Brand: Yokogawa

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems