Implementing 3-Switch XOR Ladder Logic with Internal Bit
Implement a 3-SPST switch XOR light circuit in LogixPro or RSLogix 500 using an internal relay bit. Includes truth tables, boolean equations, and verified.
The 990NAD21810 is a specialized Modbus Plus Drop Cable manufactured by Schneider Electric, designed to facilitate robust network communication between a junction box and a device with a Sub-D9 connector. This cable features a length of 2.4 meters (8 feet) and is configured for left-side connection, ensuring organized cable routing in industrial control cabinets and network infrastructures.
Modbus Plus network compatibility
Cable length: 2.4 meters (8 feet)
Connector configuration: Junction box to Sub-D9
Left-side connector orientation
High-durability design for industrial network environments
Modbus Plus fieldbus network installations
PLC and I/O communication wiring
Industrial automation infrastructure upgrades
Connectivity between network junction boxes and communication ports
| Feature | Specification |
| Manufacturer | Schneider Electric |
| Product Type | Modbus Plus Drop Cable |
| Cable Length | 2.4 meters (8 feet) |
| Connector A | Junction Box |
| Connector B | Sub-D9 |
| Orientation | Left Side |
| Weight | 0.90 kg |
| Commodity Code | 85044090 |
| Export Control (ECCN) | N |
Cable Routing: Ensure the cable is routed away from high-voltage power lines to minimize potential electromagnetic interference (EMI) on the network signal.
Bending Radius: Observe the minimum bending radius during installation to prevent internal conductor fatigue or damage to the shielding.
Connector Security: Ensure the Sub-D9 connector is fully seated and the locking screws are tightened to prevent accidental disconnection due to vibration.
Network Topology: Verify that the drop cable complies with the total segment length limitations defined by the Modbus Plus network specifications to maintain signal integrity.
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Returns & Warranty





The 990NAD21810 is a specialized Modbus Plus Drop Cable manufactured by Schneider Electric, designed to facilitate robust network communication between a junction box and a device with a Sub-D9 connector. This cable features a length of 2.4 meters (8 feet) and is configured for left-side connection, ensuring organized cable routing in industrial control cabinets and network infrastructures.
Modbus Plus network compatibility
Cable length: 2.4 meters (8 feet)
Connector configuration: Junction box to Sub-D9
Left-side connector orientation
High-durability design for industrial network environments
Modbus Plus fieldbus network installations
PLC and I/O communication wiring
Industrial automation infrastructure upgrades
Connectivity between network junction boxes and communication ports
| Feature | Specification |
| Manufacturer | Schneider Electric |
| Product Type | Modbus Plus Drop Cable |
| Cable Length | 2.4 meters (8 feet) |
| Connector A | Junction Box |
| Connector B | Sub-D9 |
| Orientation | Left Side |
| Weight | 0.90 kg |
| Commodity Code | 85044090 |
| Export Control (ECCN) | N |
Cable Routing: Ensure the cable is routed away from high-voltage power lines to minimize potential electromagnetic interference (EMI) on the network signal.
Bending Radius: Observe the minimum bending radius during installation to prevent internal conductor fatigue or damage to the shielding.
Connector Security: Ensure the Sub-D9 connector is fully seated and the locking screws are tightened to prevent accidental disconnection due to vibration.
Network Topology: Verify that the drop cable complies with the total segment length limitations defined by the Modbus Plus network specifications to maintain signal integrity.
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Color pattern |
Black
|
| Country of origin |
France
|