Overview
The 1756-L81EXT controller from Allen-Bradley delivers stable operation across extreme environments because it combines conformal coating, wide temperature tolerance, and strong processing performance. It supports harsh outdoor locations since it operates from –25°C to 70°C in standalone mode and maintains reliability in corrosive or high-moisture areas.
Performance & Environmental Features
The ControlLogix-XT platform increases durability because it protects internal components with conformal coating. Moreover, the 1756-L81EXT handles 3MB memory and manages 32 tasks, which helps large automation systems run efficiently in demanding temperature conditions.
Technical Specifications
| Parameter | Value |
|---|---|
| Brand | Allen-Bradley |
| Model | 1756-L81EXT |
| Series | ControlLogix-XT |
| Type | Extreme Temperature Controller |
| User Memory | 3 MB |
| Operating Temp (Standalone) | –25°C to 70°C |
| Temp with Flex I/O-XT | –20°C to 70°C |
| Tasks | 32 tasks |
| Programs per Task | 1,000 |
| Ports | 1 USB, 1 Ethernet |
| Current Draw | 1.20A @ 5.1V DC / 5mA @ 1.2V DC |
| Thermal Dissipation | 21.2 BTU/hour |
| Programming Languages | Ladder, ST, FBD, SFC |
| Coating | Conformal coating for corrosion resistance |
Dimensions & Weight
- Dimensions: 145 mm × 35 mm × 132 mm
- Weight: 0.29 kg
Communication Capabilities
The 1756-L81EXT improves integration flexibility because it supports multiple industrial networks:
- EtherNet/IP
- ControlNet
- DeviceNet
- Data Highway Plus
- Remote I/O
- SynchLink
- Third-party network interfaces
Application Areas
The controller fits extreme industrial environments because it tolerates rapid thermal changes and corrosive atmospheres:
- Outdoor automation equipment
- High-temperature manufacturing zones
- Low-temperature storage facilities
- Chemical or corrosive plants
- Washdown or humid areas
Reliability & Warranty
The conformal-coated circuitry extends service life because it protects against moisture, dust, and harsh chemicals. Additionally, every 1756-L81EXT comes with a 12-month warranty and worldwide delivery through DHL, UPS, or FedEx.
Frequently Asked Questions
What does XT mean in the model number?
It means Extended Temperature, which indicates wider operational temperature limits.
How many programs can the controller manage?
It supports 32 tasks and up to 1,000 programs per task.
What ports does the controller include?
It includes one USB port and one embedded Ethernet port.
What temperature range does it support?
–25°C to 70°C standalone and –20°C to 70°C when integrated with Flex I/O-XT.
What does conformal coating provide?
It protects electronics from moisture, chemicals, and airborne contaminants.
Origin
United States
Details
| Weight | 0.29 kg |
|---|---|
| Dimensions | 145 × 35 × 132 mm |
Reviews
There are no reviews yet.