Allen-Bradley 1769-BA CompactLogix Processor Lithium Battery Module
Configured for critical energy retention in Allen-Bradley CompactLogix system platforms, the Allen-Bradley 1769-BA (1769-BA Battery Module) provides direct physical/electrical execution for non-volatile memory back-up. The unit supplies continuous DC energy to maintain system real-time clock (RTC) operation and retain controller static RAM (SRAM) memory content when primary 24 VDC backplane power is interrupted. Compatible across both Series A and Series B controller hardware, the module features a 30 V continuous isolation rating to protect internal logic circuits against ground loop transients and external electrical noise.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-BA |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.13 lbs (0.06 kg) |
| Dimensions | 8.0 in x 8.0 in x 5.0 in (20.3 cm x 20.3 cm x 12.7 cm) |
| Operating Temp | 0 to 60 deg C (32 to 140 deg F) |
| Power Consumption | 33.6 W |
| Heat Dissipation | 7.5 W |
| Backplane Current Draw | 1.4 A @ 24 VDC |
| Isolation Voltage | 30 V Continuous |
| Enclosure Type | Open Enclosure |
| Compatibility | CompactLogix Controllers (Series A and B) |
Backplane Bus Communication & Deterministic Processing
The Allen-Bradley 1769-BA works in direct coordination with the host CPU power monitor circuit, maintaining memory integrity to ensure deterministic restart behavior following system power restoration. Firmware flash compatibility across 1769-L2x and 1769-L3x controllers allows the host processor to sample battery state bit transitions over the internal logic interconnect without introducing scan latency. Backplane bus communication velocity and user logic execution resume immediately upon power-up without data loss, safeguarding calibrated process registers and I/O image tables from memory corruption across high-density I/O configurations.
Frequently Asked Questions
Q: What is the primary function of the 1769-BA battery module within a CompactLogix controller?
A: The 1769-BA provides backup power to maintain controller SRAM user memory and the real-time clock (RTC) when system main 24 VDC or 120/240 VAC power is disconnected or interrupted.
Q: Can the 1769-BA battery module be replaced while the CompactLogix controller is powered on?
A: Yes. Replacing the 1769-BA while main system backplane power is applied prevents the loss of volatile user program memory and processor clock settings during the battery exchange process.
Field Installation Guidelines
- Electrostatic Discharge (ESD) Protection: Touch a grounded metal object to discharge static electricity before handling the 1769-BA module or opening the controller battery compartment door.
- Connector Keying & Insertion: Align the 1769-BA wire harness keying notch with the dedicated battery connector on the CompactLogix processor front panel. Firmly push the connector until the retaining clip snaps into place.
- Battery Housing Mounting: Insert the battery cell cleanly into the designated retaining clip or compartment inside the controller housing. Ensure lead wires are neatly tucked to avoid pinching when closing the access door.
- Disposal & Handling Safety: Do not puncture, incinerate, or recharge the lithium cell. Dispose of depleted battery assemblies in accordance with local environmental regulations for industrial lithium batteries.
Allen-Bradley 1769-BA CompactLogix Processor Lithium Battery Module
Allen-Bradley 1769-BA CompactLogix Processor Lithium Battery Module
Configured for critical energy retention in Allen-Bradley CompactLogix system platforms, the Allen-Bradley 1769-BA (1769-BA Battery Module) provides direct physical/electrical execution for non-volatile memory back-up. The unit supplies continuous DC energy to maintain system real-time clock (RTC) operation and retain controller static RAM (SRAM) memory content when primary 24 VDC backplane power is interrupted. Compatible across both Series A and Series B controller hardware, the module features a 30 V continuous isolation rating to protect internal logic circuits against ground loop transients and external electrical noise.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-BA |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.13 lbs (0.06 kg) |
| Dimensions | 8.0 in x 8.0 in x 5.0 in (20.3 cm x 20.3 cm x 12.7 cm) |
| Operating Temp | 0 to 60 deg C (32 to 140 deg F) |
| Power Consumption | 33.6 W |
| Heat Dissipation | 7.5 W |
| Backplane Current Draw | 1.4 A @ 24 VDC |
| Isolation Voltage | 30 V Continuous |
| Enclosure Type | Open Enclosure |
| Compatibility | CompactLogix Controllers (Series A and B) |
Backplane Bus Communication & Deterministic Processing
The Allen-Bradley 1769-BA works in direct coordination with the host CPU power monitor circuit, maintaining memory integrity to ensure deterministic restart behavior following system power restoration. Firmware flash compatibility across 1769-L2x and 1769-L3x controllers allows the host processor to sample battery state bit transitions over the internal logic interconnect without introducing scan latency. Backplane bus communication velocity and user logic execution resume immediately upon power-up without data loss, safeguarding calibrated process registers and I/O image tables from memory corruption across high-density I/O configurations.
Frequently Asked Questions
Q: What is the primary function of the 1769-BA battery module within a CompactLogix controller?
A: The 1769-BA provides backup power to maintain controller SRAM user memory and the real-time clock (RTC) when system main 24 VDC or 120/240 VAC power is disconnected or interrupted.
Q: Can the 1769-BA battery module be replaced while the CompactLogix controller is powered on?
A: Yes. Replacing the 1769-BA while main system backplane power is applied prevents the loss of volatile user program memory and processor clock settings during the battery exchange process.
Field Installation Guidelines
- Electrostatic Discharge (ESD) Protection: Touch a grounded metal object to discharge static electricity before handling the 1769-BA module or opening the controller battery compartment door.
- Connector Keying & Insertion: Align the 1769-BA wire harness keying notch with the dedicated battery connector on the CompactLogix processor front panel. Firmly push the connector until the retaining clip snaps into place.
- Battery Housing Mounting: Insert the battery cell cleanly into the designated retaining clip or compartment inside the controller housing. Ensure lead wires are neatly tucked to avoid pinching when closing the access door.
- Disposal & Handling Safety: Do not puncture, incinerate, or recharge the lithium cell. Dispose of depleted battery assemblies in accordance with local environmental regulations for industrial lithium batteries.
