The 1756-A17 is a 17-slot rack unit in Rockwell Automation's Allen-Bradley ControlLogix series.
It provides a physical mounting platform and high-speed backplane communication bus for processors, I/O, and communication modules in ControlLogix systems. The rack supports hot-swapping, allowing modules to be replaced without interrupting power, thus improving system availability.
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Core Features
- ✓ 17-Slot High-Density: Supports installation of up to 17 ControlLogix series modules, saving rack space.
- ✓ High-Speed Backplane Communication: Provides a high-speed data exchange channel for all modules within the rack.
- ✓ Backplane Power Distribution: Distributes logical power to each inserted module.
- ✓ High-Reliability Design: Supports redundant power supply configurations and module hot-swapping, reducing downtime.
Technical Specifications
| Brand |
Allen Bradley
|
| Model / Part Number |
1756-A17 |
| Number of slots |
17 |
| Dimensions (H x W x D) |
Approx. 20.0 x 76.2 x 20.3 cm / 7.9 x 30.0 x 8.0 in |
| Weight |
Approx. 2.2 kg (4.8 lb) |
| Operating temperature |
0°C to +60°C |
| Backplate current |
1.5 A @ 1.2V DC; 4 A @ 3.3V DC; 15 A @ 5.1V DC; 2.8 A @ 24V DC |
| Mounting method |
Horizontal mounting, supports panel/DIN rail mounting |
Frequently Asked Questions
Q: How many modules does my system require, and should I choose the 1756-A17 or a smaller rack?
A: The 1756-A17 is suitable for medium to large control systems requiring 17 or fewer modules. Please calculate the total number of all I/O, communication, and processor modules required for your project. If the total is 13-17, choose this rack; if less than 13, consider the 1756-A13 (13 slots) or 1756-A10 (10 slots) to save cost and space.
Q: Does the system support redundancy features (such as power redundancy) to ensure high reliability when using the 1756-A17 rack?
A: Yes. This rack is designed for high availability and can be configured with redundant power modules. When the main power supply fails, the backup power supply can seamlessly take over. Simultaneously, its hot-swappable feature allows modules to be replaced while the system is running, making it ideal for mission-critical applications sensitive to downtime.
Q: What is the relationship between the 1756-A17 rack (backplane) and the 1756-A17 analog input module with the same name?
A: They are not directly related; they are different products. The rack is the "casing and mainboard" for mounting the module; the analog module is one of the function cards installed in the rack slot. Please pay attention to the distinction when searching. Usually, "1756-A17" mainly refers to the rack, while the analog module has a more specific name (such as 1756-IF16).
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