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 resilient machine-level visualization in demanding industrial environments, the Beckhoff CP7902-0000-0000 Economy Control Panel provides a high-reliability interface platform with integrated signal extension. Encased in a robust, fully enclosed aluminum housing, this operator terminal features a 15-inch display with a native resolution of 1024 x 768 pixels, engineered to deliver clear, actionable plant floor graphics. It utilizes advanced DVI-E and USB-E 2.0 interface technologies, allowing the physical display and operator controls to be positioned up to 50 meters away from the industrial PC without signal degradation. With an all-around IP65 protection rating, this panel prevents water and dust ingress, making it highly suitable for direct integration on mounting arms or machine frames.
| Parameter | Value / Specification |
|---|---|
| Manufacturer | Beckhoff Automation GmbH & Co. KG |
| Model Number | CP7902-0000-0000 |
| Product Class | Economy Control Panel |
| Display Size | 15-inch diagonal |
| Resolution | 1024 x 768 pixels |
| Housing Material | Enclosed aluminum housing |
| Interface Standard | DVI-E (DVI Extended) and USB-E 2.0 |
| Max. Distance to PC | 50 meters (164 feet) |
| IP Protection Rating | IP65 (all directions) |
| Operating Temperature | 0 to 55 degC |
| Input Voltage | 24 V DC |
| Mounting Configuration | 4x threaded holes M6 x 18 mm in backplane mounting arm adapter |
| Country of Origin | Germany |
| Shipping Weight | 9.0 kg |
| Package Dimensions (Calculated) | 460 x 390 x 140 mm |
| Connection Port | Interface Type | Technical Specifications |
|---|---|---|
| DVI-E Input | Video Signal | Compatible with standard industrial PC DVI outputs; maximum length 50 m. IP65 connector. |
| USB-E 2.0 | Peripheral/Touch Signal | Transmits USB 2.0 high-speed data up to 480 Mbit/s. IP65 connector. |
| Power Input | 24 V DC Power Supply | Secure terminal connection for 24 V DC operating power. |
The CP7902-0000-0000 is directly backward compatible with earlier generations of the CP79xx series requiring the 15-inch display format. Ensure that the PC-side transmitter card (such as the Beckhoff CU8801 or CU8800 USB-to-USB-E converter) is configured to match the DVI-E and USB-E 2.0 interface specs. It can act as a direct drop-in replacement without requiring layout modifications on standard M6 mounting arm adapters.
When routing the DVI-E and USB-E 2.0 cabling over long distances, keep them segregated from high-current AC power cables, servo drive cables, or variable frequency drive (VFD) outputs. High electromagnetic interference (EMI) can disrupt the high-frequency USB-E 2.0 transmission lines, leading to temporary touchscreen dropouts. Use only shielded, factory-certified Beckhoff signal cables to guarantee a stable connection at the full 50-meter range.
Proper grounding of the aluminum enclosure is vital to eliminate electrostatic charges that can degrade touchscreen sensitivity. Connect the functional earth terminal directly to a low-impedance ground rail. Ensure that the IP65-rated connectors are completely mated and the sealing gaskets on the cable hoods are correctly seated to prevent moisture intrusion inside the connection chamber.
Isolate and lock out the 24 V DC primary power source before performing any installation or cable routing. Physical drop or mechanical shock to the screen can cause internal crystal damage. Verify that the mounting arm is structurally rated to handle the full static weight of 9.0 kg under continuous industrial vibration.
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Returns & Warranty

Designed for resilient machine-level visualization in demanding industrial environments, the Beckhoff CP7902-0000-0000 Economy Control Panel provides a high-reliability interface platform with integrated signal extension. Encased in a robust, fully enclosed aluminum housing, this operator terminal features a 15-inch display with a native resolution of 1024 x 768 pixels, engineered to deliver clear, actionable plant floor graphics. It utilizes advanced DVI-E and USB-E 2.0 interface technologies, allowing the physical display and operator controls to be positioned up to 50 meters away from the industrial PC without signal degradation. With an all-around IP65 protection rating, this panel prevents water and dust ingress, making it highly suitable for direct integration on mounting arms or machine frames.
| Parameter | Value / Specification |
|---|---|
| Manufacturer | Beckhoff Automation GmbH & Co. KG |
| Model Number | CP7902-0000-0000 |
| Product Class | Economy Control Panel |
| Display Size | 15-inch diagonal |
| Resolution | 1024 x 768 pixels |
| Housing Material | Enclosed aluminum housing |
| Interface Standard | DVI-E (DVI Extended) and USB-E 2.0 |
| Max. Distance to PC | 50 meters (164 feet) |
| IP Protection Rating | IP65 (all directions) |
| Operating Temperature | 0 to 55 degC |
| Input Voltage | 24 V DC |
| Mounting Configuration | 4x threaded holes M6 x 18 mm in backplane mounting arm adapter |
| Country of Origin | Germany |
| Shipping Weight | 9.0 kg |
| Package Dimensions (Calculated) | 460 x 390 x 140 mm |
| Connection Port | Interface Type | Technical Specifications |
|---|---|---|
| DVI-E Input | Video Signal | Compatible with standard industrial PC DVI outputs; maximum length 50 m. IP65 connector. |
| USB-E 2.0 | Peripheral/Touch Signal | Transmits USB 2.0 high-speed data up to 480 Mbit/s. IP65 connector. |
| Power Input | 24 V DC Power Supply | Secure terminal connection for 24 V DC operating power. |
The CP7902-0000-0000 is directly backward compatible with earlier generations of the CP79xx series requiring the 15-inch display format. Ensure that the PC-side transmitter card (such as the Beckhoff CU8801 or CU8800 USB-to-USB-E converter) is configured to match the DVI-E and USB-E 2.0 interface specs. It can act as a direct drop-in replacement without requiring layout modifications on standard M6 mounting arm adapters.
When routing the DVI-E and USB-E 2.0 cabling over long distances, keep them segregated from high-current AC power cables, servo drive cables, or variable frequency drive (VFD) outputs. High electromagnetic interference (EMI) can disrupt the high-frequency USB-E 2.0 transmission lines, leading to temporary touchscreen dropouts. Use only shielded, factory-certified Beckhoff signal cables to guarantee a stable connection at the full 50-meter range.
Proper grounding of the aluminum enclosure is vital to eliminate electrostatic charges that can degrade touchscreen sensitivity. Connect the functional earth terminal directly to a low-impedance ground rail. Ensure that the IP65-rated connectors are completely mated and the sealing gaskets on the cable hoods are correctly seated to prevent moisture intrusion inside the connection chamber.
Isolate and lock out the 24 V DC primary power source before performing any installation or cable routing. Physical drop or mechanical shock to the screen can cause internal crystal damage. Verify that the mounting arm is structurally rated to handle the full static weight of 9.0 kg under continuous industrial vibration.
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
|