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.
Engineered to handle complex computing operations in demanding automation environments, the Beckhoff CX2040-0140 stands as a high-performance, fan-cooled embedded industrial PC. Driven by an Intel Core i7 quad-core processor operating at 2.1 GHz, this controller offers substantial processing capacity for multi-threaded applications. The unit features built-in high-speed diagnostic capabilities, a dedicated non-volatile memory system, and an exchangeable battery-backed real-time clock. Designed for flexible integration, it natively identifies and manages both E-bus (EtherCAT) and K-bus (standard terminal) communications when connected to a compatible power supply module.
| Parameter | Specification Value |
|---|---|
| Manufacturer | Beckhoff |
| Model Number | CX2040-0140 |
| Processor | Intel Core i7 2715QE (2.1 GHz, 4 Cores) |
| Main Memory | 4 GB DDR3 RAM (non-expandable) |
| Persistent Memory | 128 kB NOVRAM |
| Storage Interface | CFast flash card slot (20 GB or 40 GB depending on OS) |
| Network Interfaces | 2 x RJ45 10/100/1000 Mbit/s (independent) |
| USB Ports | 4 x USB 2.0 |
| Video Interface | 1 x DVI-I |
| Operating System | Windows 10 IoT Enterprise 2016 LTSB |
| TwinCAT Software | No TwinCAT pre-installed (Platform Level: High Performance 70) |
| Operating Voltage | 24 V DC (-15% / +20%) |
| Power Consumption | 32 W (Maximum) |
| Protection Rating | IP20 |
| Operating Temperature | -25 to +60 degC |
| Storage Temperature | -40 to +85 degC |
| Physical Dimensions | 144 mm x 99 mm x 91 mm |
| Unit Weight | 1230 g (approx. 1.23 kg) |
| Shipping Weight (Calculated) | 3.0 kg |
The CX2040-0140 module is supplied from the factory without runtime TwinCAT control licenses (Control software: No TwinCAT). To deploy as a real-time machine controller, appropriate licenses for TwinCAT 3 (Platform Level 70 - High Performance) must be acquired and installed. It physically and logically replaces standard low-power CX modules, but requires the installation of a matching CX2100 series power supply unit to activate the physical K-bus/E-bus backplane.
Unlike low-power Intel Atom variants, the 2.1 GHz quad-core Intel Core i7 processor within the CX2040-0140 relies actively on its integrated ball-bearing fan. If the cooling assembly gets restricted or fails, thermal throttling will occur. System monitoring logic should continuously read the integrated diagnostic LED register and fan-speed monitoring flags to trigger a controlled shutdown before critical safety cutoffs are reached inside closed enclosures with ambient temperatures approaching 60 degC.
When connecting an external operator terminal, always interface your display through the native DVI-I port before powering up the controller. Real-time dynamic display Handshaking occurs during the UEFI boot sequence. To ensure system shielding and noise immunity conform to EN 61000-6-2/EN 61000-6-4, the DIN rail must have an low-impedance connection to the central control panel ground plate.
Disconnect all primary power sources before mounting or disassembling the CX2040-0140 and associated I/O modules. Failure to fully de-energize the assembly can cause permanent damage to the internal E-bus contact structures and lead to communication bus faults.
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Returns & Warranty

Engineered to handle complex computing operations in demanding automation environments, the Beckhoff CX2040-0140 stands as a high-performance, fan-cooled embedded industrial PC. Driven by an Intel Core i7 quad-core processor operating at 2.1 GHz, this controller offers substantial processing capacity for multi-threaded applications. The unit features built-in high-speed diagnostic capabilities, a dedicated non-volatile memory system, and an exchangeable battery-backed real-time clock. Designed for flexible integration, it natively identifies and manages both E-bus (EtherCAT) and K-bus (standard terminal) communications when connected to a compatible power supply module.
| Parameter | Specification Value |
|---|---|
| Manufacturer | Beckhoff |
| Model Number | CX2040-0140 |
| Processor | Intel Core i7 2715QE (2.1 GHz, 4 Cores) |
| Main Memory | 4 GB DDR3 RAM (non-expandable) |
| Persistent Memory | 128 kB NOVRAM |
| Storage Interface | CFast flash card slot (20 GB or 40 GB depending on OS) |
| Network Interfaces | 2 x RJ45 10/100/1000 Mbit/s (independent) |
| USB Ports | 4 x USB 2.0 |
| Video Interface | 1 x DVI-I |
| Operating System | Windows 10 IoT Enterprise 2016 LTSB |
| TwinCAT Software | No TwinCAT pre-installed (Platform Level: High Performance 70) |
| Operating Voltage | 24 V DC (-15% / +20%) |
| Power Consumption | 32 W (Maximum) |
| Protection Rating | IP20 |
| Operating Temperature | -25 to +60 degC |
| Storage Temperature | -40 to +85 degC |
| Physical Dimensions | 144 mm x 99 mm x 91 mm |
| Unit Weight | 1230 g (approx. 1.23 kg) |
| Shipping Weight (Calculated) | 3.0 kg |
The CX2040-0140 module is supplied from the factory without runtime TwinCAT control licenses (Control software: No TwinCAT). To deploy as a real-time machine controller, appropriate licenses for TwinCAT 3 (Platform Level 70 - High Performance) must be acquired and installed. It physically and logically replaces standard low-power CX modules, but requires the installation of a matching CX2100 series power supply unit to activate the physical K-bus/E-bus backplane.
Unlike low-power Intel Atom variants, the 2.1 GHz quad-core Intel Core i7 processor within the CX2040-0140 relies actively on its integrated ball-bearing fan. If the cooling assembly gets restricted or fails, thermal throttling will occur. System monitoring logic should continuously read the integrated diagnostic LED register and fan-speed monitoring flags to trigger a controlled shutdown before critical safety cutoffs are reached inside closed enclosures with ambient temperatures approaching 60 degC.
When connecting an external operator terminal, always interface your display through the native DVI-I port before powering up the controller. Real-time dynamic display Handshaking occurs during the UEFI boot sequence. To ensure system shielding and noise immunity conform to EN 61000-6-2/EN 61000-6-4, the DIN rail must have an low-impedance connection to the central control panel ground plate.
Disconnect all primary power sources before mounting or disassembling the CX2040-0140 and associated I/O modules. Failure to fully de-energize the assembly can cause permanent damage to the internal E-bus contact structures and lead to communication bus faults.
Global Express Shipping
Returns & Warranty
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| Country of origin |
Germany
|