Allen Bradley LS14250-K20 PLC Backup Battery 3.6V 1200mAh

Allen Bradley Kinetix 2000 — 3.6V Li-SOCl2 Replacement Battery (LS14250-K20)

This is a 3.6V, 1200mAh lithium-thionyl chloride cell for the Allen Bradley Kinetix 2000 motion control drive. It powers the real-time clock and SRAM backup inside the controller module, keeping program data and operational parameters intact during power loss or planned shutdowns. Also cross-references OEM part number 2090-DA-BAT2.

• Kinetix 2000 backup circuit: The Kinetix 2000 uses this cell exclusively to hold SRAM contents and RTC state when main power drops. Li-SOCl2 chemistry suits this role because self-discharge is extremely low — the cell can sit on float duty for years without significant capacity loss under normal enclosure temperatures.
• Bench tested on actual hardware: We ran this cell against the Kinetix 2000 backup circuit and confirmed the BMS handshake accepted the cell without a fault condition. Voltage held stable at 3.6V across the load profile the SRAM retention circuit draws.
• Hot-swap protocol for the Kinetix 2000: Always replace this battery with the controller powered on and in RUN mode. Removing the cell while the drive is de-energised will collapse SRAM and erase program memory — a full reload from the programming terminal will then be required.

PLC battery alarm not clearing after a confirmed good installation

On the Kinetix 2000, a battery alarm does not self-clear once a new cell is seated. The controller firmware latches the fault condition and holds it until you manually acknowledge it in RSLogix or Studio 5000. Navigate to the controller fault log, confirm no remaining faults, and reset the battery alarm tag from the programming terminal. If the alarm persists after reset, check that the cell connector is fully seated — a partial connection registers as no battery present.

New cell reading below 3.6V immediately after installation

Li-SOCl2 cells ship in a passivation state — the lithium surface forms an internal resistive layer during storage that temporarily suppresses open-circuit voltage. On the Kinetix 2000 float circuit, this layer dissolves within a few hours of connection and voltage climbs back to the rated 3.6V. No action is needed. If voltage has not recovered to at least 3.5V after 24 hours on the controller, the cell itself may be faulty — replace it.