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.
Decentralized signal acquisition in demanding industrial environments is managed directly at the machine level using the Beckhoff IP1002-B200. This IP67-rated Fieldbus Box functions as an 8-channel digital input module designed to interface via the high-speed, noise-immune Lightbus fiber-optic ring network. Operating at a nominal voltage of 24 V DC and featuring a hardware-defined 3 ms input filter delay, this module ensures reliable signal transmission from proximity sensors, limit switches, and photoelectric eyes without requiring a protective electrical enclosure.
| Manufacturer | Beckhoff |
| Model Number | IP1002-B200 |
| Fieldbus System | Lightbus (Optical Fiber) |
| Number of Inputs | 8 digital inputs |
| Nominal Voltage | 24 V DC (-15% / +20%) |
| Input Filter Time | 3.0 ms |
| Sensor Connection | M12 (screw type) |
| Protection Rating | IP67 |
| Operating Temperature | 0 degC to +55 degC |
| Storage Temperature | -25 degC to +85 degC |
| Shipping Weight (Calculated) | 2.0 kg |
| M12 Connector Pin | Signal Assignment / Function |
|---|---|
| Pin 1 | +24 V DC Sensor Supply (US) |
| Pin 2 | No Connection (NC) |
| Pin 3 | GND (GNDs) |
| Pin 4 | Input Signal (Channels 1 to 8 respectively) |
| Pin 5 | Functional Earth (FE) |
The IP1002-B200 module is standardly compatible with existing Lightbus optical ring controllers. While physical installation sizes are consistent across the IP1000 and IP1002 series, check your master controller's TwinCAT system configuration file (TSD/XML) to ensure the proper addressing offsets are applied when migrating legacy modules to the newer IP1002-B200 hardware revision.
Since Lightbus depends entirely on optical transmission, the routing of the plastic optical fiber (POF) lines is critical. Standard POF cables connected to the IP1002-B200 require a minimum bend radius of 30 mm. Exceeding this bend limit or applying excessive tensile force will cause permanent structural damage to the PMMA fiber core, resulting in immediate Lightbus ring communication failure (indicated by red status LEDs on the diagnostic panel).
To secure the IP67 sealing rating of the M12 connector points, tighten all sensor cables to a exact torque threshold of 0.6 Nm. Always seal unassigned M12 channels with official IP67 protective screw caps. Utilizing hand-tightened or standard un-torqued connections will compromise the protective boundary, allowing coolant ingress and tracking faults inside the connection channels.
Isolate all 24 V DC system power sources and disconnect control loops prior to attaching or detaching any Fieldbus Box connections. Fiber-optic transmitters emit non-visible light; avoid looking directly into open optical transceiver channels or disconnected fiber interfaces during system diagnostic checks.
Global Express Shipping
Returns & Warranty

Decentralized signal acquisition in demanding industrial environments is managed directly at the machine level using the Beckhoff IP1002-B200. This IP67-rated Fieldbus Box functions as an 8-channel digital input module designed to interface via the high-speed, noise-immune Lightbus fiber-optic ring network. Operating at a nominal voltage of 24 V DC and featuring a hardware-defined 3 ms input filter delay, this module ensures reliable signal transmission from proximity sensors, limit switches, and photoelectric eyes without requiring a protective electrical enclosure.
| Manufacturer | Beckhoff |
| Model Number | IP1002-B200 |
| Fieldbus System | Lightbus (Optical Fiber) |
| Number of Inputs | 8 digital inputs |
| Nominal Voltage | 24 V DC (-15% / +20%) |
| Input Filter Time | 3.0 ms |
| Sensor Connection | M12 (screw type) |
| Protection Rating | IP67 |
| Operating Temperature | 0 degC to +55 degC |
| Storage Temperature | -25 degC to +85 degC |
| Shipping Weight (Calculated) | 2.0 kg |
| M12 Connector Pin | Signal Assignment / Function |
|---|---|
| Pin 1 | +24 V DC Sensor Supply (US) |
| Pin 2 | No Connection (NC) |
| Pin 3 | GND (GNDs) |
| Pin 4 | Input Signal (Channels 1 to 8 respectively) |
| Pin 5 | Functional Earth (FE) |
The IP1002-B200 module is standardly compatible with existing Lightbus optical ring controllers. While physical installation sizes are consistent across the IP1000 and IP1002 series, check your master controller's TwinCAT system configuration file (TSD/XML) to ensure the proper addressing offsets are applied when migrating legacy modules to the newer IP1002-B200 hardware revision.
Since Lightbus depends entirely on optical transmission, the routing of the plastic optical fiber (POF) lines is critical. Standard POF cables connected to the IP1002-B200 require a minimum bend radius of 30 mm. Exceeding this bend limit or applying excessive tensile force will cause permanent structural damage to the PMMA fiber core, resulting in immediate Lightbus ring communication failure (indicated by red status LEDs on the diagnostic panel).
To secure the IP67 sealing rating of the M12 connector points, tighten all sensor cables to a exact torque threshold of 0.6 Nm. Always seal unassigned M12 channels with official IP67 protective screw caps. Utilizing hand-tightened or standard un-torqued connections will compromise the protective boundary, allowing coolant ingress and tracking faults inside the connection channels.
Isolate all 24 V DC system power sources and disconnect control loops prior to attaching or detaching any Fieldbus Box connections. Fiber-optic transmitters emit non-visible light; avoid looking directly into open optical transceiver channels or disconnected fiber interfaces during system diagnostic checks.
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
|