Emerson

1.Main Functions

• Backup battery power management: Monitors and manages the backup battery pack for the Emerson DCS/controller rack.plcva.com.
• Power switchover: Automatically switches to battery power when main 24VDC input power fails, maintaining continuous operation of the controller and memory.
• Battery charging control: Provides constant current / constant voltage charging for backup batteries, prevents overcharging and deep discharge to extend battery service life.
• Battery status monitoring: Real-time detection of battery voltage, charging current and battery health state.
• Fault alarm output: Generates dry contact or digital alarm signals for low battery, battery failure, charging fault and power loss, and sends alerts to the DCS system.
• Memory data retention: Preserves controller configuration, parameters and historical data during mains power outage.
• Overvoltage, overcurrent and reverse polarity protection: Built-in multi-layer protection to avoid circuit damage caused by abnormal power supply.

Core summary: This battery backup card monitors and charges the backup battery; it automatically supplies emergency power to the control rack once main power is lost, protecting controller data and avoiding sudden system shutdown.plcva.com.

EMERSON DU-BAT2 Card Board

2. Applications

1. Distributed Control System (DCS) racks: Emerson legacy DCS control cabinets, used for controller backup power.
2. Power generation industry: Thermal power plant control systems, power plant auxiliary control cabinets.
3. Oil & gas industry: Refinery, natural gas processing plant and offshore platform control racks.
4. Chemical & petrochemical plants: Continuous process control systems requiring uninterrupted power.
5. Water treatment & pulp and paper industries: Critical control loops with high continuity requirements.
6. Industrial automation retrofit & spare parts replacement: Used as replacement spare for existing installed Emerson control racks.www.plcva.com

EMERSON DU-BAT2 Card Board

3. Product Features Summary

• Rack plug-in design, easy installation and hot swap in compatible chassis.
• Continuous real-time battery health monitoring and fault diagnosis.
• Integrated charge & discharge control logic to protect backup batteries.
• Industrial-grade circuit design, anti-interference and wide operating temperature range for heavy industrial environments.
• Provides alarm signal for remote monitoring by DCS or SCADA system.
• Designed for long-term 24/7 continuous operation.
• Widely used as spare replacement component for legacy Emerson control systems.

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