Allen-Bradley 1756-L74 ControlLogix Logix5574 PAC – High-Performance Automation Controller with 16MB Memory & USB Port
Product Description
The Allen-Bradley 1756-L74 is a Programmable Automation Controller (PAC) from the ControlLogix 5570 series. Designed for industrial automation, it features 16MB user memory, 0.98MB I/O memory, and includes a 1GB non-volatile SD card (expandable to 2GB). With a built-in USB 2.0 programming port, it supports up to 128,000 digital I/O and 4,000 analog I/O. Compatible with multiple networks like EtherNet/IP, DeviceNet, and ControlNet, it’s ideal for motion control and large-scale automation.
Key Features
- 16MB user memory for complex applications
- 1GB non-volatile memory (included, expandable to 2GB)
- 1 x USB 2.0 port for easy programming
- Supports 128,000 digital & 4,000 analog I/O
- Integrated motion control (SERCOS, EtherNet/IP)
- Energy storage module (no battery required)
- 12-month warranty
Technical Data
| Brand | Allen-Bradley / Rockwell Automation |
| Model | 1756-L74 (Logix5574) |
| Memory | 16MB user, 0.98MB I/O, 1GB non-volatile (SD card) |
| I/O Capacity | 128,000 digital / 4,000 analog |
| Communication | USB 2.0, EtherNet/IP, ControlNet, DeviceNet |
| Power | 5.1V DC, 800mA (2.5W power dissipation) |
| Operating Temp | 0°C to 60°C (32°F to 140°F) |
| Enclosure | Open-style (chassis-mounted) |
Installation & Compatibility
Fits in all 1756 ControlLogix chassis (e.g., 1756-A4, A7, A10). Requires standard power supplies like 1756-PA50 or 1756-PA72. For redundancy, use 1756-PA75R/PB75R. Compatible with energy modules 1756-ESMCAP, 1756-ESMNSE.
Package Includes
- 1756-L74 Controller
- 1GB SD card (1784-SD1)
- Pre-installed 1756-ESMCAP module
- Documentation
Shipping & Warranty
Fast global delivery via FedEx, UPS, or DHL. 12-month warranty included.
Download Resources
For detailed specifications, download the ControlLogix I/O Modules Datasheet.










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