PLCs, Power Supplies & Others

Technical Overview of the SFCU

The Yokogawa AFS20S/AFG20S Safety Field Control Unit (SFCU) delivers robust and secure control for critical industrial processes. This unit integrates seamlessly into the CENTUM VP system and supports a wide array of field devices . It offers 32 FIO slots, providing extensive connectivity for various I/O modules . Furthermore, the unit supports dual-redundant configurations, which significantly enhances overall system reliability and uptime . The Yokogawa AFS20S/AFG20S handles demanding safety applications with a wide operating temperature range from -20 to +70 °C . Its robust construction also ensures reliable operation in environments with significant vibration and shock .

Detailed Technical Specifications

Physical and Electrical Characteristics

The unit requires a 24 V DC power supply with a current of 20 A for operation . Furthermore, when considering system installation, the in-rush current for the AFS20S/AFG20S can peak significantly, particularly for 220 V AC systems . For cabinet-mounted versions, the power consumption reaches 1700 VA with a node unit installed . Consequently, heating values for this configuration can be substantial, reaching 3960 × 10³ J/h .

Installation and Configuration

You can mount this field control unit in a standard cabinet . It supports mounting with or without an integrated node unit. Specifically, the weight and power specifications vary based on the included components. For example, the version with a node unit draws 50 A at 24 V DC . This cabinet design facilitates straightforward installation and maintenance.

Details