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 ABB 3BHE004468R0021 GDC780BE21 is a circuit board engineered for high-performance signal processing and system control within ABB industrial automation platforms. Manufactured in Sweden, this component serves as a core processing interface designed to maintain operational stability and rapid system responsiveness across high-demand control loops.
At its core, the ABB 3BHE004468R0021 GDC780BE21 is driven by an embedded 32/64-bit RISC processor paired with 128 MB to 512 MB of DDR2/DDR3 SDRAM. Powered by a nominal +24 V DC supply, this computational setup allows the board to efficiently process complex control algorithms, execute real-time logic, and handle rapid data exchange with connected field equipment.
Designed for compact control cabinet integration, the ABB 3BHE004468R0021 GDC780BE21 features a slim profile with a weight of 0.34 kg. Its robust electronic construction ensures reliable continuous duty across industrial temperature ranges from 0 degC to +55 degC.
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Product Model | 3BHE004468R0021 GDC780BE21 |
| Spare Model | GDC780BE21 |
| Module Type | Circuit Board |
| Country of Origin | Sweden |
| Parameter | Specification |
|---|---|
| Power Supply | +24 V DC |
| Main Processor | 32/64-bit RISC processor |
| SDRAM | 128-512 MB DDR2/DDR3 |
| Parameter | Specification |
|---|---|
| Operating Temperature | 0 degC to +55 degC (32 degF to 131 degF) |
| Storage Temperature | -40 degC to +85 degC (-40 degF to 185 degF) |
| Relative Humidity | 5% to 95% (non-condensing) |
| Weight | 0.34 kg |
| Estimated Shipping Size | 2 x 19.6 x 26.1 cm |
| Tariff Code | 8537101190 |
Global Express Shipping
Returns & Warranty



The ABB 3BHE004468R0021 GDC780BE21 is a circuit board engineered for high-performance signal processing and system control within ABB industrial automation platforms. Manufactured in Sweden, this component serves as a core processing interface designed to maintain operational stability and rapid system responsiveness across high-demand control loops.
At its core, the ABB 3BHE004468R0021 GDC780BE21 is driven by an embedded 32/64-bit RISC processor paired with 128 MB to 512 MB of DDR2/DDR3 SDRAM. Powered by a nominal +24 V DC supply, this computational setup allows the board to efficiently process complex control algorithms, execute real-time logic, and handle rapid data exchange with connected field equipment.
Designed for compact control cabinet integration, the ABB 3BHE004468R0021 GDC780BE21 features a slim profile with a weight of 0.34 kg. Its robust electronic construction ensures reliable continuous duty across industrial temperature ranges from 0 degC to +55 degC.
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Product Model | 3BHE004468R0021 GDC780BE21 |
| Spare Model | GDC780BE21 |
| Module Type | Circuit Board |
| Country of Origin | Sweden |
| Parameter | Specification |
|---|---|
| Power Supply | +24 V DC |
| Main Processor | 32/64-bit RISC processor |
| SDRAM | 128-512 MB DDR2/DDR3 |
| Parameter | Specification |
|---|---|
| Operating Temperature | 0 degC to +55 degC (32 degF to 131 degF) |
| Storage Temperature | -40 degC to +85 degC (-40 degF to 185 degF) |
| Relative Humidity | 5% to 95% (non-condensing) |
| Weight | 0.34 kg |
| Estimated Shipping Size | 2 x 19.6 x 26.1 cm |
| Tariff Code | 8537101190 |
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 |
Green
|
| Country of origin |
Switzerland
|