Configured for RAM memory retention in SLC 500 and MicroLogix controllers, the Allen-Bradley 1747-BA (1747-BA Lithium Battery) provides direct physical/electrical execution.
Hardware Specifications
Parameter
Specification
Model
1747-BA
Brand
Allen-Bradley
Origin
USA / Global Manufacturing standard
Weight
0.04 lbs (0.018 kg)
Dimensions
Compact OEM lithium cell assembly with wire leads and connector form factor
Operating Temp
0 to 60 deg C (32 to 140 deg F)
Power Consumption
Non-rechargeable primary cell (850 mAh capacity)
Output Voltage
3 VDC
Battery Chemistry
Lithium (Non-Rechargeable)
Capacity
850 mAh
Primary Application
RAM memory retention during power loss
Compatibility
Allen-Bradley SLC 5/01, 5/02, 5/03, 5/04, 5/05, and MicroLogix 1500
The 1747-BA operates within the Allen-Bradley SLC 500 controller architecture to preserve volatile RAM data and maintain system configuration state during main AC or DC power outages. Delivering a continuous 3 VDC potential to internal memory circuits, the cell prevents application program corruption and firmware status loss without impacting backplane bus communication velocity or active controller processing cycles when operational power is restored.
Frequently Asked Questions
Q: Can the 1747-BA battery assembly be replaced while the SLC 500 controller remains powered?
A: Yes, replacing the 1747-BA while backplane power is actively supplied to the CPU prevents RAM data loss during the battery swap procedure.
Q: Is the 1747-BA lithium cell rechargeable after system power recovery?
A: No, the 1747-BA is a non-rechargeable primary lithium cell. Attempting to charge the battery from an external source can cause thermal runaway or permanent cell failure.
Field Installation Guidelines
Observe proper ESD precautions and anti-static wrist strap grounding before opening the processor access door.
Locate the two-pin battery connector socket on the front face or side board of the SLC 500 processor.
Disconnect the old battery plug from the keyway socket, taking care not to pull directly on the insulated wire leads.
Align the polarized plug of the new 1747-BA assembly with the socket pins and press firmly into place.
Secure the battery inside the plastic retention clip inside the CPU housing and verify the BATT LED indicator turns off upon power-up.
