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 Allen-Bradley 1756-L62S is a safety controller belonging to the GuardLogix family designed for integrated safety and standard control applications within ControlLogix systems. Featuring 4 MB of standard user memory and 2 MB of safety memory, the 1756-L62S provides dual-controller architecture capability when paired with a safety partner module to achieve high-integrity functional safety. The unit includes one built-in RS232 local programming port for direct communication, configuration, and diagnostics. It supports up to 100 motion axes for complex motion control tasks across automated industrial environments.
| Parameter | Specification |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Model | 1756-L62S |
| Product Type | GuardLogix Safety Controller |
| Standard Memory | 4 MB |
| Safety Memory | 2 MB |
| Local Programming Port | 1 RS232 |
| Embedded Network Port | None |
| Motion Axis Supported | 100 |
| Replacement Battery | 1756-BA2 |
| Country of Origin | United States of America |
| Connector Pin | Function |
|---|---|
| 1 | DCD (Data Carrier Detect) |
| 2 | RXD (Receive Data) |
| 3 | TXD (Transmit Data) |
| 4 | DTR (Data Terminal Ready) |
| 5 | GND (Signal Ground) |
| 6 | DSR (Data Set Ready) |
| 7 | RTS (Request to Send) |
| 8 | CTS (Clear to Send) |
| 9 | NC (Not Connected) |
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Returns & Warranty



The Allen-Bradley 1756-L62S is a safety controller belonging to the GuardLogix family designed for integrated safety and standard control applications within ControlLogix systems. Featuring 4 MB of standard user memory and 2 MB of safety memory, the 1756-L62S provides dual-controller architecture capability when paired with a safety partner module to achieve high-integrity functional safety. The unit includes one built-in RS232 local programming port for direct communication, configuration, and diagnostics. It supports up to 100 motion axes for complex motion control tasks across automated industrial environments.
| Parameter | Specification |
|---|---|
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Model | 1756-L62S |
| Product Type | GuardLogix Safety Controller |
| Standard Memory | 4 MB |
| Safety Memory | 2 MB |
| Local Programming Port | 1 RS232 |
| Embedded Network Port | None |
| Motion Axis Supported | 100 |
| Replacement Battery | 1756-BA2 |
| Country of Origin | United States of America |
| Connector Pin | Function |
|---|---|
| 1 | DCD (Data Carrier Detect) |
| 2 | RXD (Receive Data) |
| 3 | TXD (Transmit Data) |
| 4 | DTR (Data Terminal Ready) |
| 5 | GND (Signal Ground) |
| 6 | DSR (Data Set Ready) |
| 7 | RTS (Request to Send) |
| 8 | CTS (Clear to Send) |
| 9 | NC (Not Connected) |
Global Express Shipping
Returns & Warranty
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| Color pattern |
Black
|
| Country of origin |
United States
|
| Power source |
DC Power
|