The Allen-Bradley 1756-L71, part of the ControlLogix 5571 family, is a robust single-core controller engineered for demanding automation environments. Designed to handle up to 128,000 digital I/O points and 4,000 analog I/O points, this controller excels in high-speed sequencing, motion control, and process applications. With a 2 MB user memory and 1 MB I/O memory, it provides ample capacity for complex programs and data logging. The 1756-L71 supports Ethernet/IP, ControlNet, and DeviceNet communications, and is fully compatible with the 1756 chassis series, including 1756-A7, A10, A13, and A17. Its redundant control capability ensures uninterrupted operation in mission-critical systems. Below are the key specifications for the 1756-L71 controller.
| Specification |
Details |
| Model Number |
1756-L71 |
| Processor Type |
Single-core, ControlLogix 5571 |
| User Memory |
2 MB (standard) |
| I/O Memory |
1 MB |
| Maximum Digital I/O |
128,000 points |
| Maximum Analog I/O |
4,000 points |
| Communication Ports |
1x Ethernet/IP (RJ45), 1x Serial (RS-232/485), 1x USB (for programming) |
| Network Support |
Ethernet/IP, ControlNet, DeviceNet |
| Redundancy |
Supported (with 1756-RM2 module) |
| Chassis Compatibility |
1756-A7, A10, A13, A17 (all ControlLogix chassis) |
| Power Supply Requirement |
24V DC (typical), 1.2A max |
| Operating Temperature |
-40°C to +85°C (-40°F to +185°F) |
| Storage Temperature |
-40°C to +105°C (-40°F to +221°F) |
| Relative Humidity |
5% to 95% (non-condensing) |
| Vibration Resistance |
5 g Standard Models 10-500 Hz (operating) |
| Shock Resistance |
30 g (operating) |
| Dimensions (H x W x D) |
5.25 in x 1.75 in x 5.25 in (133 mm x 44 mm x 133 mm) |
| Weight |
0.56 lb (0.25 kg) |
| Certifications |
UL, CE, CSA, ATEX (Zone 2), IECEx |
| Warranty |
1 year (standard) |
What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
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2020/02/22