Product Overview
The Allen-Bradley 1756-BATM is a 3.6-volt lithium battery assembly designed for ControlLogix programmable logic controllers. As a replacement battery, it maintains critical memory and real-time clock data during power interruptions, ensuring seamless operation of your industrial control system. With a nominal capacity of 1.7 Ah and an average shelf life of 10 years, this battery provides long-term reliability for demanding applications.
Key Technical Specifications
Below are the core specifications for the Allen-Bradley 1756-BATM, sourced directly from the manufacturer's data:
| Specification |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number |
1756-BATM |
| Series |
ControlLogix |
| Battery Type |
Externally Mounted |
| Processor Compatibility |
1756-L55M14, -L55M16, -L6x |
| Power Dissipation (Max) |
4.5 Watts |
| Mounting |
Horizontal |
| Dimensions |
20 x 24 x 8 inches |
| Weight |
2.4 pounds (1.1 kilograms) |
| Enclosure |
Open |
| Backplane Current (5 Volts DC) |
10 amps |
| Backplane Current (24 Volts DC) |
2.8 Amps |
| UPC |
10612598284761 |
The 1756-BATM features a single-cell lithium design weighing just 10 grams, which contributes to its low self-discharge rate compared to Ni-Cad or NiMH cells. It requires a wire lead connector for terminal connection and a 1-meter Category 3 cable for wiring. The battery operates within a temperature range of -60°C to +85°C, making it suitable for harsh industrial environments.
Compatibility and Integration
The Allen-Bradley 1756-BATM is compatible with a wide range of ControlLogix controllers, including the 1756-L55Mxx, 1756-L61, 1756-L62, and 1756-L63 models. It also works with the 1756-L6x series. The battery assembly includes a 3.28-foot cable that connects directly to the controller, and it can be mounted either on a panel or on a DIN rail, providing flexible installation options.
Applications and Use Cases
This battery is essential for maintaining program memory and real-time clock data in PLCs used across manufacturing, process control, and discrete automation. In a typical production line, the Allen-Bradley 1756-BATM ensures that critical process parameters are retained during brief power outages, minimizing downtime and preventing data loss. Its long shelf life and robust temperature tolerance make it ideal for remote or unattended installations where maintenance access is limited.
Installation and Mounting Guidance
When installing the 1756-BATM, ensure the controller is powered down to avoid electrical hazards. The battery can be mounted directly to the panel or on a DIN rail; if using a DIN rail, a DIN rail lock is required to secure it. Use the provided 3.28-foot cable to connect the battery to the controller, and route the cable away from high-voltage lines to prevent interference. Verify that the ambient temperature stays within the specified range to ensure optimal battery performance.
Maintenance and Reliability
The lithium chemistry of the 1756-BATM provides a lower self-discharge rate than traditional Ni-Cad or NiMH batteries, extending the effective service life and reducing replacement frequency. Although the average shelf life is 10 years, periodic checks of battery voltage (nominal 3.6V) and capacity (1.7 Ah) are recommended. For maximum reliability, replace the battery before it reaches the end of its service life, especially in critical applications where unexpected failure could cause costly downtime.
Selection Guide and Purchasing Advice
Before purchasing a replacement battery, verify that the part number matches your controller model and that the mounting configuration suits your panel layout. The Allen-Bradley 1756-BATM is a genuine Rockwell Automation product, ensuring compatibility and performance. When sourcing industrial automation parts, PLC Source PRO offers authentic components with fast shipping, helping you maintain your system's uptime.