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.
Optimized for space-constrained, decentralized automation architectures, the Beckhoff EPP2817-0008 provides a high-density digital output interface directly in the field without requiring an electrical enclosure. This ruggedized EtherCAT P Box module incorporates 24 digital outputs in a single housing, utilizing a compact 25-pin D-sub interface to distribute power to actuators, contactors, and indicators. By utilizing EtherCAT P technology, the unit integrates ultra-high-speed data transmission and dual 24 V DC power supplies (US for control voltage and UP for peripheral load voltage) into a single, standardized P-coded M8 connection, dramatically reducing cabling complexity, weight, and installation footprints.
| Parameter | Specification Value |
|---|---|
| Manufacturer | Beckhoff Automation |
| Model Reference | EPP2817-0008 |
| Communication Protocol | EtherCAT P |
| Bus Interface | 2 x M8 socket, shielded, screw type, P-coded (Upstream/Downstream) |
| Number of Digital Outputs | 24 |
| Output Connection Type | D-sub socket, 25-pin, UNC4-40 mounting thread |
| Permissible Load Types | Ohmic (resistive), inductive, lamp load |
| Nominal Output Voltage | 24 V DC (-15% / +20%) |
| Maximum Output Current | 0.5 A per channel (short-circuit proof), 3.0 A cumulative sum max |
| Switching Execution Speed | Typical Turn-on (TON): 10 us | Typical Turn-off (TOFF): 50 us |
| Short-Circuit Current Limit | Maximum 1.0 A peak per channel |
| Current Consumption (from US) | Typical 100 mA |
| Auxiliary Power Current (from UP) | Typical 20 mA + connected load current |
| Electrical Isolation | 500 V RMS (test voltage) |
| Operating Temperature Range | -25 to +60 degC |
| Storage Temperature Range | -40 to +85 degC |
| Vibration/Shock Resistance | Conforms to EN 60068-2-6 / EN 60068-2-27 |
| EMC Immunity and Emission | Conforms to EN 61000-6-2 / EN 61000-6-4 |
| Environmental Protection Rating | IP65 / IP66 / IP67 (conforms to EN 60529) |
| Standards and Approvals | CE, UL |
| Net Weight | 0.165 kg (approx. 165 g) |
| Shipping Weight (Calculated) | 0.500 kg |
| Connector Port | Physical Type | Functional Assignment |
|---|---|---|
| EtherCAT P Input | M8, 4-pin socket, P-coded | Incoming EtherCAT communication, US system/sensor power, UP load/actuator power |
| EtherCAT P Output | M8, 4-pin socket, P-coded | Outgoing EtherCAT communication and power daisy-chain to downstream EPP modules |
| Digital Outputs (1 to 24) | 25-pin D-sub socket, UNC4-40 | Pin 1 to 24: Digital Output Channels | Pin 25: Common Ground (GND) |
The EPP2817-0008 represents the advanced EtherCAT P single-cable variant of the standard EP2817 multi-cable systems. Note that standard EtherCAT (EP-series, A/D-coded) and EtherCAT P (EPP-series, P-coded) cannot be interconnected directly without an EP9224 or EP9228 power injector/junction box. When planning hardware transitions from legacy layouts, confirm your TwinCAT system manager configurations are updated with the XML device description file (ESI) specifically generated for EtherCAT P modules.
While individual outputs are capable of switching a nominal load of 0.5 A, system designers must rigorously observe the cumulative current budget. The maximum total sum current of the module is strictly capped at 3.0 A due to structural thermal constraints within the IP67 housing. Operating the module above this limit will trigger thermal protection and localized shut-downs. Additionally, because inductive loads generate inverse EMF voltage spikes, external freewheeling diodes should be used on high-inductance solenoids to preserve switching life, despite internal clamping protective circuits.
To maintain maximum electromagnetic compatibility (EMC) in harsh industrial environments, always use fully shielded 25-pin D-sub mating cables with the outer shield terminated to the metallic D-sub shell backshell. Ensure that the M8 P-coded locking nuts are tightened using a calibrated torque wrench (typically 0.4 Nm) to guarantee the IP67 rating and avoid continuous micro-interruptions in high-vibration applications.
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Optimized for space-constrained, decentralized automation architectures, the Beckhoff EPP2817-0008 provides a high-density digital output interface directly in the field without requiring an electrical enclosure. This ruggedized EtherCAT P Box module incorporates 24 digital outputs in a single housing, utilizing a compact 25-pin D-sub interface to distribute power to actuators, contactors, and indicators. By utilizing EtherCAT P technology, the unit integrates ultra-high-speed data transmission and dual 24 V DC power supplies (US for control voltage and UP for peripheral load voltage) into a single, standardized P-coded M8 connection, dramatically reducing cabling complexity, weight, and installation footprints.
| Parameter | Specification Value |
|---|---|
| Manufacturer | Beckhoff Automation |
| Model Reference | EPP2817-0008 |
| Communication Protocol | EtherCAT P |
| Bus Interface | 2 x M8 socket, shielded, screw type, P-coded (Upstream/Downstream) |
| Number of Digital Outputs | 24 |
| Output Connection Type | D-sub socket, 25-pin, UNC4-40 mounting thread |
| Permissible Load Types | Ohmic (resistive), inductive, lamp load |
| Nominal Output Voltage | 24 V DC (-15% / +20%) |
| Maximum Output Current | 0.5 A per channel (short-circuit proof), 3.0 A cumulative sum max |
| Switching Execution Speed | Typical Turn-on (TON): 10 us | Typical Turn-off (TOFF): 50 us |
| Short-Circuit Current Limit | Maximum 1.0 A peak per channel |
| Current Consumption (from US) | Typical 100 mA |
| Auxiliary Power Current (from UP) | Typical 20 mA + connected load current |
| Electrical Isolation | 500 V RMS (test voltage) |
| Operating Temperature Range | -25 to +60 degC |
| Storage Temperature Range | -40 to +85 degC |
| Vibration/Shock Resistance | Conforms to EN 60068-2-6 / EN 60068-2-27 |
| EMC Immunity and Emission | Conforms to EN 61000-6-2 / EN 61000-6-4 |
| Environmental Protection Rating | IP65 / IP66 / IP67 (conforms to EN 60529) |
| Standards and Approvals | CE, UL |
| Net Weight | 0.165 kg (approx. 165 g) |
| Shipping Weight (Calculated) | 0.500 kg |
| Connector Port | Physical Type | Functional Assignment |
|---|---|---|
| EtherCAT P Input | M8, 4-pin socket, P-coded | Incoming EtherCAT communication, US system/sensor power, UP load/actuator power |
| EtherCAT P Output | M8, 4-pin socket, P-coded | Outgoing EtherCAT communication and power daisy-chain to downstream EPP modules |
| Digital Outputs (1 to 24) | 25-pin D-sub socket, UNC4-40 | Pin 1 to 24: Digital Output Channels | Pin 25: Common Ground (GND) |
The EPP2817-0008 represents the advanced EtherCAT P single-cable variant of the standard EP2817 multi-cable systems. Note that standard EtherCAT (EP-series, A/D-coded) and EtherCAT P (EPP-series, P-coded) cannot be interconnected directly without an EP9224 or EP9228 power injector/junction box. When planning hardware transitions from legacy layouts, confirm your TwinCAT system manager configurations are updated with the XML device description file (ESI) specifically generated for EtherCAT P modules.
While individual outputs are capable of switching a nominal load of 0.5 A, system designers must rigorously observe the cumulative current budget. The maximum total sum current of the module is strictly capped at 3.0 A due to structural thermal constraints within the IP67 housing. Operating the module above this limit will trigger thermal protection and localized shut-downs. Additionally, because inductive loads generate inverse EMF voltage spikes, external freewheeling diodes should be used on high-inductance solenoids to preserve switching life, despite internal clamping protective circuits.
To maintain maximum electromagnetic compatibility (EMC) in harsh industrial environments, always use fully shielded 25-pin D-sub mating cables with the outer shield terminated to the metallic D-sub shell backshell. Ensure that the M8 P-coded locking nuts are tightened using a calibrated torque wrench (typically 0.4 Nm) to guarantee the IP67 rating and avoid continuous micro-interruptions in high-vibration applications.
Global Express Shipping
Returns & Warranty
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| Country of origin |
Germany
|