Allen-Bradley 1756-BA1 ControlLogix Lithium Battery Assembly

Configured for memory backup in Series A ControlLogix and FlexLogix controllers, the Allen-Bradley 1756-BA1 (1756-BA1 Battery Assembly) provides direct physical/electrical execution of static RAM energy retention and clock synchronization during backplane power removal.

Hardware Specifications

Deterministic Backplane & Power Backup Architecture

The cell connects directly to the internal controller motherboard via keyless lead terminals, maintaining non-volatile real-time clock running states and preserving static volatile memory structures when backplane power is dropped. Low-voltage monitoring circuits on the controller continuously query the battery potential, initiating firmware status warnings to backplane bus communication routines before voltage drops below the threshold for memory corruption. This guarantees zero impact on controller program retention or network communication readiness upon chassis power restoration.

Frequently Asked Questions

Q: Which Allen-Bradley controller hardware series requires the 1756-BA1 battery assembly?

A: The 1756-BA1 is engineered specifically for Series A ControlLogix processors (including 1756-L61, 1756-L62, 1756-L63, 1756-L55M, 1756-L60M03SE) and compatible FlexLogix controllers.

Q: What are the primary electrical output ratings of this lithium assembly?

A: The battery cell outputs a nominal continuous rating of 3 VDC with an integrated charge storage capacity of 1800 mAh.

Q: Will volatile controller memory be cleared if the battery is removed while the chassis is powered?

A: No, if backplane system power to the chassis remains active during replacement, backplane current powers the memory circuits, allowing live battery replacement without losing user program code or clock data.

Field Installation Guidelines

Perform grounding steps to prevent electrostatic discharge (ESD) before handling internal processor components. Access the internal controller panel by opening the front housing door on the host module.

Disconnect the wire connector from the battery header and release the retaining clip securing the depleted battery cell. Insert the new 1756-BA1 unit into the holder and firmly seat the wire plug into the dedicated board connector. Verify that the BAT fault light on the front processor display clears when the module operates on backplane power. Handle and recycle depleted 3V lithium power cells in accordance with local environmental regulations governing hazardous waste disposal.