The Allen-Bradley 1756-L73XT is an 8 MB ControlLogix-XT 5570 series controller from Rockwell Automation, specifically engineered for extreme industrial environments. The "XT" designation indicates conformal coating applied to the circuit board and an extended operating temperature range of -25°C to +70°C (-13°F to +158°F), enabling reliable operation in harsh conditions without climate-controlled enclosures.
Item No :
1756-L73XTOrder(MOQ) :
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EXWProduct Origin :
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WuhanLead Time :
3~5 daysWeight :
5kg| Specification | Description |
|---|---|
| Manufacturer | Rockwell Automation (Allen-Bradley) |
| Model | 1756-L73XT |
| Product Family | ControlLogix-XT 5570 / Logix 5573 |
| Product Type | Programmable Automation Controller (PAC) |
| User Memory | 8 MB |
| I/O Memory | 0.98 MB |
| Maximum I/O | 128,000 digital / 4,000 analog |
| Maximum Connections | 500 |
| Motion Axes Supported | Up to 100 |
| Controller Tasks | 32 tasks, 100 programs per task |
| Local Programming Port | 1 USB |
| Embedded Network Port | No (requires separate communication module) |
| Non-Volatile Memory | Secure Digital (SD) card included |
| Replacement Battery | 1756-ESMCAPXT |
| Operating Temperature | -25°C to +70°C (-13°F to +158°F) |
| Conformal Coating | Yes (XT-rated) |
| Power Dissipation | 2.5 W typical |
| Backplane Current | 800 mA @ 5.1V DC; 5 mA @ 1.2V DC |
| Programming Software | Studio 5000 Logix Designer / RSLogix 5000 |
| Safety Certification | SIL 3, PLe |
| Lifecycle Status | Active Mature |
| Model | Description | Typical Application |
|---|---|---|
| 1756-L73 | Standard temperature version (0°C to +60°C), same 8 MB memory | Climate-controlled control rooms |
| 1756-L72XT | XT version with 4 MB memory | Extreme environments with smaller program requirements |
| 1756-L74XT | XT version with 16 MB memory | Extreme environments with larger program requirements |
| 1756-L73S | GuardLogix safety controller (8 MB standard + 4 MB safety) | Applications requiring integrated safety and standard control |
| 1756-ESMCAPXT | Replacement Energy Storage Module for XT controllers | Memory retention backup for XT series |
| 1756-EN2TXT | EtherNet/IP communication module (XT-rated) | Adding network connectivity in extreme environments |
Q1: What is the difference between the 1756-L73XT and the standard 1756-L73?
The 1756-L73XT features conformal coating on the circuit board and an extended operating temperature range of -25°C to +70°C, compared to the standard L73's 0°C to +60°C range. This makes the XT version suitable for harsh environments such as oil & gas facilities, mining operations, and outdoor installations without climate-controlled enclosures.
Q2: Does the 1756-L73XT have built-in Ethernet?
No. Like all 1756-L7x series controllers, the L73XT requires a separate communication module (e.g., 1756-EN2T or 1756-EN2TXT) for EtherNet/IP connectivity. It has only a USB programming port built in.
Q3: What is the user memory capacity of this controller?
The 1756-L73XT has 8 MB of user memory for program and data storage. This is sufficient for large, complex applications involving process control, motion, and discrete automation.
Q4: Can the 1756-L73XT be used in safety applications?
The controller itself supports SIL 3 and PLe certifications. However, for dedicated safety functions requiring GuardLogix capabilities, the 1756-L73S (with 4 MB safety memory) is the recommended model. The L73XT is primarily designed for standard control in extreme environments.
Q5: What is the replacement battery for the 1756-L73XT?
The controller uses the 1756-ESMCAPXT Energy Storage Module (ESM) for memory retention. Unlike traditional lithium batteries, the ESM eliminates maintenance and environmental disposal issues associated with lithium batteries.
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