Description

YOKOGAWA AIP521S (AIP521 S1)
The YOKOGAWA AIP521S (S1) is a control bus coupler card of Yokogawa’s CENTUM VP/BP DCS system. It is used to achieve V-NET/VL-NET bus communication and data exchange, and it is the core communication module of the DCS system.

Core parameters
Brand: YOKOGAWA
Model: AIP521S (AIP521 S1)
Function: Control bus coupler (V-NET/VL-NET)
Power supply: 24 VDC (18–30 VDC), maximum 3 W
Communication interface:
1× Isolated RS-485 (VL-NET)
1× Ethernet 10/100 Mbps (V-NET)
Isolation level: Channel-bus 500 VAC; Bus-ground 1500 VAC
Operating temperature: -20°C ~ +70°C
Size (width × height × depth): 152 × 51 × 229 mm
Weight: Approximately 0.22–0.8 kg
Certifications: CE, UL, ATEX Zone 2, IECEx
Installation: DIN rail / rack installation, supports hot swapping
Warranty: 12 months
Condition: New original, in stock and ready for sale

Key Features
Native DCS Compatibility: Seamless integration with Yokogawa CENTUM VP/BP system, no need for gateway, simplifies architecture.
Highly Reliable Isolation Design: Strong isolation for anti-interference, suitable for high electromagnetic interference environments in industries such as petrochemical and power.
Wide Temperature Range and Anti-Vibration: Industrial-grade reinforced design, capable of withstanding -20°C to +70°C and vibration, suitable for harsh working conditions.
Hot Swap Maintenance: Supports online replacement without affecting system operation, reducing downtime risks.
High Density Expansion: Up to 256 points of I/O supported by a single coupler, saves cabinet space and wiring costs.
Typical Applications
Oil and Gas: Remote I/O for offshore platforms, control of oil and gas processing equipment.
Chemical and Petrochemical: Temperature / pressure monitoring for reactors, batch production control.
Power Industry: Auxiliary system control for power turbines, integration of DCS and field equipment.
Pharmaceutical and Fine Chemicals: Automation of aseptic processes, data collection and monitoring.