Allen Bradley 1771-BA D-cell Battery 1.5V 17000mAh PLC-2 Backup

Product Overview

Allen Bradley 1771-BA is a standard D‑cell alkaline battery. It provides backup power for PLC‑2/20 and PLC‑2/30 controllers. Each controller uses two batteries for redundancy. This battery delivers 1.5 V DC with a 17,000 mAh capacity. It ensures reliable operation during power interruptions.

The 1771‑BA belongs to the PLC‑5 series. It features button‑top terminals for easy installation. This battery is non‑rechargeable and designed for single‑use. It is a critical component for maintaining memory and program retention in legacy Allen Bradley systems.

Technical Specifications

Performance & Environmental Data

• Backup duration: Up to 6 months at 60 °C; up to 12 months at 45 °C.
• Temperature range: Operates reliably from ‑20 °C to 60 °C.
• Humidity tolerance: 0…95 % RH (non‑condensing).
• Vibration resistance: Suitable for industrial environments (per IEC 60068).
• Shock resistance: Withstands 30 g (11 ms) – typical for PLC chassis.

Installation & Maintenance

• Insert two batteries into the designated slots on the PLC‑2/20 or PLC‑2/30.
• Ensure correct polarity: button top (+) matches the positive contact.
• Replace both batteries at the same time for balanced performance.
• Do not mix old and new batteries.
• Dispose of used batteries according to local regulations.
• Regularly check battery status during routine maintenance.

Compatibility & Application

• Compatible controllers: Allen Bradley PLC‑2/20 and PLC‑2/30.
• Application: Backup power for program memory and real‑time clock.
• Critical for: Preventing data loss during power outages.
• Also used in: Some older I/O racks and remote chassis.

Diagnostic & Monitoring

• Most PLC systems provide a battery low LED or status bit.
• Monitor the “BAT” indicator on the front panel of the controller.
• Replace batteries immediately when the low‑battery warning appears.
• Check battery voltage periodically using a multimeter.

Typical Applications

• Memory retention in PLC‑2/20 and PLC‑2/30 automation systems.
• Backup for critical process control programs.
• Spare part for legacy Allen Bradley installations.
• Emergency power for industrial controllers in manufacturing plants.

Why Buy From Oiltech Controls?

• Over 15 years of experience in industrial automation spare parts.
• Global shipment support – we deliver worldwide.
• Tested industrial surplus and refurbished options available.
• 12‑month warranty on all products.
• Technical verification before shipment to guarantee performance.
• Support for obsolete control systems and legacy equipment.

Packaging, Shipping & Warranty

• Package: Each battery is individually packed in anti‑static packaging.
• Shipping carriers: FedEx, UPS, DHL – global express services.
• Warranty: 12‑month warranty against manufacturing defects.
• Return policy: Contact us within 30 days for returns or exchanges.

Frequently Asked Questions (FAQ)

• Q: Is the 1771‑BA rechargeable?
  A: No, this is a single‑use alkaline battery. Do not attempt to recharge it.
• Q: How many batteries do I need for one controller?
  A: Each PLC‑2/20 or PLC‑2/30 requires two 1771‑BA batteries.
• Q: What is the expected backup time?
  A: Approximately 6 months at 60 °C and 12 months at 45 °C.
• Q: Can I use a different brand D‑cell battery?
  A: We recommend using only genuine Allen Bradley 1771‑BA to ensure reliability.
• Q: How do I know when to replace the battery?
  A: The controller will display a battery low LED or status warning.
• Q: Does this battery work with PLC‑5 systems?
  A: No, the 1771‑BA is specifically for PLC‑2/20 and PLC‑2/30.

For inquiries: info@oiltechcontrols.com or +86 158 8020 0923 (WhatsApp).

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