Description

Product Overview:

The Yokogawa AIP602 is a high-performance Vnet Coupler Unit, also known as a Vnet/IP to Vnet Gateway, used within the CENTUM VP and CENTUM CS 3000 systems. Unlike PC cards like the AIP827, the AIP602 is a standalone, rack-mounted hardware device designed to facilitate communication between different control network segments or domains. It is a crucial component for ensuring high-reliability communication over large distances or complex network topologies.

Key Features:

1. Dual Redundancy:

• Fully supports Yokogawa’s redundant network architecture (Bus 1 and Bus 2), ensuring reliable and fault-tolerant communication between network segments.

2. Galvanic Isolation:

• Provides electrical isolation between different segments of the network to protect against ground loops and electromagnetic interference (EMI), ensuring clean and stable signal transmission.

3. Signal Conditioning:

• Regenerates and conditions the digital signal, maintaining clean waveforms and preventing data corruption over long-distance cable runs.

4. Hot-Swappable:

• Designed for industrial availability, this feature allows for maintenance or replacement without interrupting the operation of the entire control network.

5. Flexible Connectivity:

• Supports both Vnet (coaxial) and Vnet/IP (RJ45/fiber), making it adaptable for various configurations and network needs.

Technical Specifications:

Parameter	Specification Details
Model Number	AIP602
Function	Vnet/IP or Vnet Coupler / Gateway
Mounting	19-inch Rack-mount or Baseplate-mount
Network Type	Vnet (Coaxial) / Vnet/IP (RJ45/Fiber)
Redundancy	Dual-redundant communication
Power Supply	100-120 VAC or 220-240 VAC (Model dependent)
Operating Temp	0°C to +50°C

 

Common Use Cases:

1. Domain Coupling:

• Used to connect a Domain 1 control network to a Domain 2 network, ensuring logical separation of traffic while allowing communication between different control systems.

2. Distance Extension:

• Acts as a signal repeater, extending the physical distance between Field Control Stations (FCS) when it exceeds the typical cable limitations.

3. Media Conversion:

• Facilitates media conversion from coaxial Vnet to fiber-optic or Ethernet-based Vnet/IP in certain configurations, allowing for flexible network setups.

Troubleshooting & Maintenance:

• Status Indicators:

• STATUS (Green): Normal operation.

• ERROR (Red): Indicates an internal hardware failure or configuration mismatch.

• RCV/SND (Orange): Indicates data traffic activity.

• Cable Integrity:

• Since the AIP602 often serves as the mid-point in a network, failure of this unit can disrupt communication for an entire segment of the plant. Ensure BNC connectors for Vnet are properly connected and terminated with 50Ω resistors, especially if the unit is at the end of a line.

• Environmental Check:

• The unit may be placed in satellite rack rooms, making it susceptible to dust buildup. Regularly check that cooling vents are clear to prevent overheating and thermal shutdowns.

Hardware Notes:

• If you are migrating a legacy CENTUM CS system to CENTUM VP, the AIP602 often serves as the critical bridge that facilitates communication between new VP stations and older CS control stations.

Specifications

• Brand: Yokogawa

Advantages

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