Mitsubishi Electric MDS-A-BT-6 Battery Backup Unit

The Mitsubishi Electric MDS-A-BT-6 Battery Backup Unit is an internal, rechargeable module designed to preserve PLC memory and program data when primary power is interrupted. Installed inside a Mitsubishi PLC rack or controller chassis, it maintains configuration settings and system parameters for Mitsubishi PLC and controller series that accept the MDS-A-BT-6, helping prevent data loss and downtime in automation environments. Typical applications include manufacturing automation, process control systems, conveyor operations, packaging machinery, and material handling systems where continuous memory retention is critical. Technical specs: MPN MDS-A-BT-6; Battery Type: Rechargeable internal battery; Voltage: typically 6 V (model dependent); Capacity: designed for PLC memory backup with configuration-dependent mAh; Operating Temperature: 0°C to 50°C; Storage Temperature: -20°C to 60°C; Mounting Type: Internal module mount within PLC rack or controller chassis; Function: Maintains PLC memory/program data during power loss; Common Replacements: Mitsubishi MDS-A-BT-5; Allen-Bradley 1769-BAT; Siemens 6ES7972-0BA12-0XA0. This unit is designed for safe industrial use with internal circuits and recommends periodic battery replacement per the manufacturer.