The 1756-N2 is a passive slot filler module (also known as a "slot cover" or "virtual module") from Rockwell Automation's Allen-Bradley ControlLogix series.
It contains no electronic circuitry; it is merely a physical enclosure used to fill unused slots in ControlLogix racks. Its primary function is to protect the backplane circuitry from dust, moisture, and other industrial contaminants, while also helping to maintain airflow within the rack and ensure effective system cooling.
100% Original & Authentic In-Stock & Fast Shipping Expert Technical Support 12-Month Warranty
Core Features
- ✓ Physical Protection: Fills empty slots to prevent dust, debris, and corrosive gases from entering the rack backplane, protecting sensitive electronic contacts.
- ✓ Airflow Management: Covers keep the rack front panel flat, guiding cooling air along a designed path through the installed modules to ensure effective heat dissipation.
- ✓ Module Reservation Space: Allows for reserving space in the system configuration for future modules while maintaining a clean rack appearance.
- ✓ Passive and Maintenance-Free: Consumes no (or very low) backplane current, contains no electronic components, supports hot-swapping, and requires no configuration or maintenance.
Technical Specifications
| Brand |
Allen Bradley
|
| Model / Part Number |
1756-N2 |
| Packaging Specifications |
2 pieces per pack |
| Slot Width |
1 slot |
| Backplane Current Consumption |
800 mA @ 5V |
| Operating Temperature |
0°C to +60°C |
| Storage Temperature |
-25°C to +60°C |
| Relative Humidity |
5-95%, non-condensing |
| Installation Method |
Snaps directly into an empty rack slot, no screws required |
Frequently Asked Questions
Q: What is the practical purpose of the 1756-N2 empty slot filler module? Is it okay not to install it?
A: Installation is recommended. Although empty slots in ControlLogix racks can be used without any modules, this exposes the backplane connectors. In industrial environments, dust, conductive debris, or corrosive gases can enter and damage these high-precision contacts, leading to poor contact issues during future module installations. Furthermore, empty slots disrupt airflow within the rack, potentially affecting heat dissipation for adjacent modules. Using the 1756-N2 cover is an industry-recommended best practice, effectively ensuring long-term system reliability.
Q: Does the 1756-N2 consume backplane current? Will it affect the rack power budget?
A: It has virtually no impact. The 1756-N2 is a passive module containing no electronic circuitry, therefore its backplane current consumption is extremely low (some sources show "no current consumption"). Even if some technical manuals specify an 800mA @ 5V current rating, this value is completely negligible in the overall power budget of a ControlLogix rack. You do not need to reserve any significant power margin for the 1756-N2 when designing your power load.
Q: In which racks can the 1756-N2 be installed?
A: Extremely wide compatibility. The 1756-N2 is designed with a standard single-slot width and can be installed in any empty slot of any 1756 series ControlLogix rack, including the 1756-A17, A13, A10, A7, and A4 models you mentioned earlier. Installation is simple: just push it into the empty slot until it locks in place; no tools are required. Hot-swapping is also supported without disconnecting the system power.
Why Partner With Us?
100% Original
Genuine spare parts through rigorous supply chain control.
Quick Shipping
Expedited delivery through our global logistics network.
24/7 Support
Uninterrupted technical assistance for system installation.
Large Stock
Immediate availability from our massive control systems inventory.
leave a message
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.
English
IPv6 network supported
