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 to integrate directly onto the right-hand side of compatible operator interfaces, the C9900-E545 provides supplementary physical operator control elements for CP6xxx and CP7xxx series Control Panels and Panel PCs. This hardware extension is engineered specifically for 15-inch displays configured without integrated keyboards, delivering structured control feedback in demanding industrial environments.
The layout incorporates 16 illuminated push-buttons alongside a dedicated safety element. Operator signals utilize a dual-transmission design: primary control transmission and signal lamp illumination route via CP-Link or USB interfaces, while a terminal strip allows secondary hardwiring of normally-open contacts for critical process operations. Customizable label inserts permit site-specific marking of individual buttons to align with plant system configurations.
| Manufacturer | BECKHOFF |
| Part Number / Model | C9900-E545 |
| Compatibility | CP6xxx and CP7xxx series Control Panels / Panel PCs (15-inch display without keyboard) |
| Mounting Location | Right-hand side of the host panel |
| Push-Buttons | 16 x illuminated push-buttons (Siemens Signum square, 30 x 30 mm) |
| Emergency Stop Switch | 1 x Siemens Signum emergency stop (directly wireable) |
| Signal Interface | CP-Link or USB (for primary contacts and signal lamps) |
| Auxiliary Interface | Terminal row (for hardwiring second normally-open contacts) |
| Shipping Weight | 5 kg |
| Interface Type | Function Assignment |
|---|---|
| USB / CP-Link Connection | Primary normally-open (NO) contact transmission and signal lamp control power. |
| Internal Terminal Strip | Direct connection points for secondary normally-open (NO) contacts. |
| Emergency Stop Terminals | Dedicated dry contact points for direct safety circuit integration. |
Global Express Shipping
Returns & Warranty

Designed to integrate directly onto the right-hand side of compatible operator interfaces, the C9900-E545 provides supplementary physical operator control elements for CP6xxx and CP7xxx series Control Panels and Panel PCs. This hardware extension is engineered specifically for 15-inch displays configured without integrated keyboards, delivering structured control feedback in demanding industrial environments.
The layout incorporates 16 illuminated push-buttons alongside a dedicated safety element. Operator signals utilize a dual-transmission design: primary control transmission and signal lamp illumination route via CP-Link or USB interfaces, while a terminal strip allows secondary hardwiring of normally-open contacts for critical process operations. Customizable label inserts permit site-specific marking of individual buttons to align with plant system configurations.
| Manufacturer | BECKHOFF |
| Part Number / Model | C9900-E545 |
| Compatibility | CP6xxx and CP7xxx series Control Panels / Panel PCs (15-inch display without keyboard) |
| Mounting Location | Right-hand side of the host panel |
| Push-Buttons | 16 x illuminated push-buttons (Siemens Signum square, 30 x 30 mm) |
| Emergency Stop Switch | 1 x Siemens Signum emergency stop (directly wireable) |
| Signal Interface | CP-Link or USB (for primary contacts and signal lamps) |
| Auxiliary Interface | Terminal row (for hardwiring second normally-open contacts) |
| Shipping Weight | 5 kg |
| Interface Type | Function Assignment |
|---|---|
| USB / CP-Link Connection | Primary normally-open (NO) contact transmission and signal lamp control power. |
| Internal Terminal Strip | Direct connection points for secondary normally-open (NO) contacts. |
| Emergency Stop Terminals | Dedicated dry contact points for direct safety circuit integration. |
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
|