PLCs, Power Supplies & Others

Technical Specifications and Hardware Overview

The Yokogawa AND20 serves as a node interface unit within the CENTUM VP distributed control system architecture. This module measures 130 mm in height, 54 mm in width, and 120 mm in depth for standard panel mounting. It weighs roughly 0.8 kilograms, which facilitates simple handling during installation procedures. The unit draws 0.35 A from a 24 V DC power supply, consuming approximately 8.4 W during normal operation. It features one ESB bus interface port for backbone network connectivity. The module also provides one dedicated node interface port for field device communication.

It contains 128 MB of flash memory for firmware storage and 64 MB of RAM for data handling. The unit supports a maximum bus transmission distance of 185 meters per segment. It offers optical isolation between the bus and internal logic for noise immunity. The operating temperature range extends from -10°C to 55°C for industrial environments. Storage temperatures can range from -20°C to 70°C without compromising integrity. Humidity tolerance spans 10% to 90% non-condensing conditions for reliable performance.

Communication Capabilities and System Integration

This node interface unit manages data exchange at 10 Mbps across the ESB backbone network. It supports up to 64 connected devices per bus segment for flexible system scaling. The Yokogawa AND20 incorporates dual LED indicators for power and communication status monitoring. It provides electrostatic discharge protection up to 6 kV for enhanced operational robustness. The unit includes a built-in watchdog timer for automatic reset during fault scenarios. It utilizes a 14-pin terminal block for straightforward external wiring connections.

Configuration data resides in non-volatile memory to retain settings after power cycles. The module supports hot-swappable replacement to reduce downtime during maintenance activities. It complies with IEC 61131-2 standards for industrial automation equipment. The unit features a conformal coating on the PCB to resist dust and moisture damage. It includes a ground terminal for proper chassis earthing to minimize electrical noise.

Installation Requirements and Reliability Metrics

The AND20 mounts onto a standard DIN rail for quick and easy panel integration. It requires 50 mm clearance above and below for sufficient airflow around the housing. The module delivers a mean time between failures of 500,000 hours for long-term dependability. It carries CE marking and UL recognition for international deployment scenarios. The unit passes vibration testing at 5 to 8.4 Hz with 3.5 mm amplitude. It withstands shock loads up to 15 g for 11 ms duration without performance loss.

Event logs store in 8 MB of dedicated buffer memory for diagnostic purposes. Firmware updates occur via the ESB bus for future feature additions. The unit contains a single printed circuit board assembly with integrated processors. This design choice simplifies maintenance and reduces potential failure points significantly.

Details