Features:
- 1MB Volatile User Memory
- Broad Network Compatibility
- Modular Communication Design
The Allen-Bradley 1756-L1M2/A features 1MB of battery-backed RAM, which provides a dedicated area for storing user programs and application data for high-speed logic operations.
This Allen-Bradley 1756-L1M2/A module is designed to control both local and remote I/O across various industrial networks, including DeviceNet, ControlNet, and Universal Remote I/O, ensuring flexible integration into complex automation architectures.
The Allen‑Bradley 1756‑L1M2/A features a flexible modular architecture that requires compatible communication modules (such as 1756-ENBT for Ethernet/IP or other network interface modules) to establish connectivity, allowing users to customize networking capabilities based on specific system integration requirements.
The 1756‑L1M2/A Allen-Bradley ControlLogix Processor Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
The Allen‑Bradley 1756‑L1M2/A ControlLogix Processor Module Manuals,Datasheets,Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
The Allen‑Bradley 1756‑L1M2/A ControlLogix Processor Module
General
- Manufacturer Allen-Bradley
- Model 1756‑L1M2/A
- Condition New Original ready stock
- Product Family 1756-L1M1,1756-L1M2,1756-L1M3
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Temperature range – Operates from 0°C to 60°C (32 °F to 140 °F); storage from -40 °C to 85 °C (-40 °F to 185 °F).
- Humidity and shock – Withstands 5–95% noncondensing humidity, 30 g operating shock, and 2 g vibration at 10‑500 Hz.
- Electrical conditions – Requires an open‑style enclosure (no internal ingress protection); isolation voltage is 30V continuous.
- Emissions and immunity – Group 1, Class A emissions; immunity includes 6 kV contact ESD and 10V/m radiated RF up to 1 GHz.
- Network monitoring – Status of DeviceNet, ControlNet, and Universal Remote I/O links can be read via RSLogix 5000 diagnostics.
- Battery and memory supervision – The software provides warnings when battery voltage is low; program checksums verify memory integrity.
- Fault handling – Major recoverable faults are reported through the controller’s status LED and can be captured programmatically.
- Live insertion – RIUP capability allows module replacement without powering down, but ESD procedures must be strictly followed.
- Mixed‑network factories – Ideal for facilities that combine ControlNet for real‑time motion and DeviceNet for discrete sensors.
- Retrofit projects – Direct replacement for older 1756‑L1 or 1756‑L1Mx controllers in existing ControlLogix 5550 chassis.
- Battery‑backed control – Suitable for applications where a short power interruption cannot be tolerated, provided batteries are maintained.
- Electrically noisy environments – Works near large motors, welders, or VFDs due to its high ESD and RF immunity ratings..