YOKOGAWA BC1A BC1A BRAIN SC COMMUNICATION CARD AS S9103BJ-0 REV NO 1 2

Description:

The Yokogawa BC1A BRAIN/SC Communication Card AS-S9103BJ-0 is used in distributed control systems for communication between signal conditioner cards and field instruments using BRAIN protocol. Commonly installed in Yokogawa signal conditioner nests and DCS cabinets to enable configuration and monitoring of connected transmitters. Maintenance teams and system integrators use this part for enabling communication, replacing failed communication cards, or maintaining reliable parameter access and diagnostics in process control systems.

Applications:

The Yokogawa BC1A communication card is commonly used in industrial environments where BRAIN protocol communication is required between field instruments and control systems. It is frequently applied in oil & gas, chemical plants, and power generation systems to allow configuration, monitoring, and diagnostics of transmitters such as pressure, flow, and temperature devices. The card interfaces with signal conditioner modules and enables communication without interrupting the 4–20 mA signal loop.

Technical Specifications:

• Manufacturer: Yokogawa
• Model / Part Number: BC1A / AS-S9103BJ-0
• Product Type: BRAIN/SC Communication Card
• Communication Protocol: Yokogawa BRAIN protocol (superimposed on 4–20 mA loop)
• Function: Enables configuration, monitoring, and diagnostics of field instruments
• Interface: Connects to signal conditioner nests and communication ports
• Communication Method: Burst modulation signal over analog current loop
• Baud Rate: ~1200 bps typical for BRAIN communication
• Compatibility: Yokogawa signal conditioner cards and BRAIN-enabled transmitters
• Installation: Mounted in signal conditioner nest or control system rack
• Application: Field instrument communication, calibration, and diagnostics
• Country of Origin: Japan
• Status: Legacy / surplus communication card

Common Replacements:

• Yokogawa ESC Communication Card (Signal Conditioner Comm Card)
• Yokogawa EA2 Transmitter Input Card with BRAIN Communication
• Yokogawa ALR121 Serial Communication Module