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.
Designed for demanding, high-performance automation tasks, the CX2042-N031-0002 serves as a robust basic CPU module within the modular Beckhoff CX2000 Embedded PC family. Utilizing multi-core processing power, this industrial controller is engineered to handle complex TwinCAT real-time control, PLC, NC, and CNC applications with high precision. This specific hardware variant integrates the -N031 system interface option, providing an RS485 serial communication port configured via a 9-pin D-sub socket. Engineered as a drop-point configuration without echo and with termination switched off, it allows for direct integration with legacy serial devices and serial fieldbus systems within the cabinet.
| Manufacturer | Beckhoff Automation |
| Part Number / Model | CX2042-N031-0002 |
| Series | CX2000 Embedded PC |
| Module Type | Basic CPU Module |
| Interface Option | -N031 (RS485 interface) |
| Connection Type | 9-pin D-sub socket |
| Interface Configuration | Drop point, without echo, termination off |
| System Bus Connection | Direct connection to Beckhoff I/O terminals (EtherCAT) |
| Shipping Weight | 3.0 kg |
| Interface Type | Specification / Pinout | Configuration Settings |
|---|---|---|
| RS485 | 9-pin D-sub female socket | Drop point configuration |
| Echo Mode | Disabled (Without echo) | Internal loopback off |
| Termination | Switched Off | External termination required if acting as network end-node |
Global Express Shipping
Returns & Warranty

Designed for demanding, high-performance automation tasks, the CX2042-N031-0002 serves as a robust basic CPU module within the modular Beckhoff CX2000 Embedded PC family. Utilizing multi-core processing power, this industrial controller is engineered to handle complex TwinCAT real-time control, PLC, NC, and CNC applications with high precision. This specific hardware variant integrates the -N031 system interface option, providing an RS485 serial communication port configured via a 9-pin D-sub socket. Engineered as a drop-point configuration without echo and with termination switched off, it allows for direct integration with legacy serial devices and serial fieldbus systems within the cabinet.
| Manufacturer | Beckhoff Automation |
| Part Number / Model | CX2042-N031-0002 |
| Series | CX2000 Embedded PC |
| Module Type | Basic CPU Module |
| Interface Option | -N031 (RS485 interface) |
| Connection Type | 9-pin D-sub socket |
| Interface Configuration | Drop point, without echo, termination off |
| System Bus Connection | Direct connection to Beckhoff I/O terminals (EtherCAT) |
| Shipping Weight | 3.0 kg |
| Interface Type | Specification / Pinout | Configuration Settings |
|---|---|---|
| RS485 | 9-pin D-sub female socket | Drop point configuration |
| Echo Mode | Disabled (Without echo) | Internal loopback off |
| Termination | Switched Off | External termination required if acting as network end-node |
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 .
| Country of origin |
Germany
|