- Series B ControlLogix 5561 controller with 2 MB data and logic memory
- 478 KB I/O memory with optional 1784-CF64 CompactFlash nonvolatile storage
- ControlLogix chassis controller with RS-232 local communication and 1756-BA2 battery support
1756-L61/B is the Series B version of the Allen-Bradley ControlLogix 5561 controller.
The controller provides 2 MB of data and logic memory, 478 KB of I/O memory, an RS-232 port, and support for optional 1784-CF64 CompactFlash storage.
Before replacement, preserve the complete project and verify Series B hardware, firmware, memory use, battery condition, communication modules, I/O ownership, chassis power, and all controller connections.
Availability, condition, price, and shipping time for 1756-L61/B are confirmed during quotation.
Allen-Bradley 1756-L61/B ControlLogix Controller Manuals, Datasheets, Links
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.
- Provides 2 MB of data and logic memory
- Provides 478 KB of dedicated I/O memory
- Supports optional 1784-CF64 CompactFlash project storage
- Allen-Bradley 1756-L61/B occupies one slot in a ControlLogix chassis
- The controller must use the chassis slot assigned in the saved ControlLogix project
- Confirm chassis power capacity and the positions of communication and I/O modules before startup
- Back up the complete controller project before removing the unit
- Inspect the 1756-BA2 battery and verify chassis power
- Match the RS-232 cable, communication modules and I/O ownership
- ControlLogix 5560 chassis-based control applications
- Discrete, analog, motion and communication-system coordination
- Series B replacement of a documented 1756-L61 controller