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 operate directly in harsh industrial environments without a control cabinet, the Beckhoff ER2338-0001 enables decentralized routing of bidirectional digital control signals. This EtherCAT Box module features 8 digital channels that are individually and freely configurable as either inputs or outputs. By supporting dynamic configuration, this module simplifies field I/O layout adjustments and reduces the overall hardware footprint in complex processing lines. Each channel is processed with high temporal precision, offering integrated input filtering and short-circuit protection for connected sensors.
| Technical Parameter | Specification Value |
|---|---|
| Manufacturer | Beckhoff |
| Model Number | ER2338-0001 |
| Protocol | EtherCAT |
| Bus Interface | 2 x M8 socket, shielded, screw type |
| Number of Channels | 8 digital inputs or outputs, freely configurable |
| I/O Connections | M8 x 1, 3-pin, A-coded |
| Input Filter Time | 10 microseconds |
| "0" Signal Voltage Range | -3 to +5 V |
| "1" Signal Voltage Range | 11 to 30 V, 6 mA input current (EN 61131-2, type 3) |
| Sensor Supply | From load supply voltage, max. 0.5 A total, short-circuit proof |
| Supported Load Types | Ohmic, inductive, lamp load |
| Rated Load Voltage | 24 V DC (-15% / +20%) |
| Max. Output Current | 0.5 A per channel |
| Switching Times | typ. TON: 50 microseconds, typ. TOFF: 100 microseconds |
| Current Consumption (US) | 120 mA |
| Auxiliary Power Current | typ. 20 mA + load |
| Power Supply Interface | Feed: 1 x M8 male 4-pin; Downstream: 1 x M8 female 4-pin |
| Electrical Isolation | 500 V |
| Protection Rating | IP65/IP66/IP67 (conforms to EN 60529) |
| Operating Temperature | -25 to +60 degC |
| Storage Temperature | -40 to +85 degC |
| Physical Module Weight | approx. 265 g |
| Shipping Weight (Calculated) | 2.0 kg |
| Interface Type | Connector Form Factor | Assignment & Purpose |
|---|---|---|
| EtherCAT Bus Input/Output | 2 x M8 socket, shielded, screw-type | EtherCAT communication downstream/upstream linking. |
| Digital I/O Channels (0-7) | 8 x M8 female socket, 3-pin, A-coded | Configurable digital signal and sensor supply. Pin 1: +24 V DC sensor supply, Pin 3: GND, Pin 4: Input/Output signal. |
| Power Supply Feed | 1 x M8 male socket, 4-pin | System/sensor voltage (Us) and peripheral load voltage (Up). |
| Power Supply Downstream | 1 x M8 female socket, 4-pin | Feed-through power to adjacent EtherCAT Box modules. |
The ER2338-0001 features fully configurable channels, which makes it an ideal, high-efficiency spare part replacing either pure digital input (ER1008) or pure digital output (ER2008) units in machine modifications. Note that TwinCAT ESI (EtherCAT Slave Information) configurations must specifically define the operational profile (Input vs. Output mode) for each channel to match the physical wiring.
Thermal management inside completely enclosed, non-ventilated routing channels must be monitored closely. Although rated up to +60 degC ambient, driving all 8 outputs at their maximum 0.5 A inductive rating simultaneously causes significant localized heating within the cast housing. Ensure proper spacing or metallic surface heat sinking is utilized if cumulative output current exceeds 3.0 A.
During commissioning, verify that the Us (system power) and Up (load power) loops are isolated appropriately if safety relays are installed. A common fault is tying Us and Up to the same field supply line, which overrides safety-related external output de-energization loops. Always torque all M8 connectors to exactly 0.4 Nm to preserve environmental sealing.
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Designed to operate directly in harsh industrial environments without a control cabinet, the Beckhoff ER2338-0001 enables decentralized routing of bidirectional digital control signals. This EtherCAT Box module features 8 digital channels that are individually and freely configurable as either inputs or outputs. By supporting dynamic configuration, this module simplifies field I/O layout adjustments and reduces the overall hardware footprint in complex processing lines. Each channel is processed with high temporal precision, offering integrated input filtering and short-circuit protection for connected sensors.
| Technical Parameter | Specification Value |
|---|---|
| Manufacturer | Beckhoff |
| Model Number | ER2338-0001 |
| Protocol | EtherCAT |
| Bus Interface | 2 x M8 socket, shielded, screw type |
| Number of Channels | 8 digital inputs or outputs, freely configurable |
| I/O Connections | M8 x 1, 3-pin, A-coded |
| Input Filter Time | 10 microseconds |
| "0" Signal Voltage Range | -3 to +5 V |
| "1" Signal Voltage Range | 11 to 30 V, 6 mA input current (EN 61131-2, type 3) |
| Sensor Supply | From load supply voltage, max. 0.5 A total, short-circuit proof |
| Supported Load Types | Ohmic, inductive, lamp load |
| Rated Load Voltage | 24 V DC (-15% / +20%) |
| Max. Output Current | 0.5 A per channel |
| Switching Times | typ. TON: 50 microseconds, typ. TOFF: 100 microseconds |
| Current Consumption (US) | 120 mA |
| Auxiliary Power Current | typ. 20 mA + load |
| Power Supply Interface | Feed: 1 x M8 male 4-pin; Downstream: 1 x M8 female 4-pin |
| Electrical Isolation | 500 V |
| Protection Rating | IP65/IP66/IP67 (conforms to EN 60529) |
| Operating Temperature | -25 to +60 degC |
| Storage Temperature | -40 to +85 degC |
| Physical Module Weight | approx. 265 g |
| Shipping Weight (Calculated) | 2.0 kg |
| Interface Type | Connector Form Factor | Assignment & Purpose |
|---|---|---|
| EtherCAT Bus Input/Output | 2 x M8 socket, shielded, screw-type | EtherCAT communication downstream/upstream linking. |
| Digital I/O Channels (0-7) | 8 x M8 female socket, 3-pin, A-coded | Configurable digital signal and sensor supply. Pin 1: +24 V DC sensor supply, Pin 3: GND, Pin 4: Input/Output signal. |
| Power Supply Feed | 1 x M8 male socket, 4-pin | System/sensor voltage (Us) and peripheral load voltage (Up). |
| Power Supply Downstream | 1 x M8 female socket, 4-pin | Feed-through power to adjacent EtherCAT Box modules. |
The ER2338-0001 features fully configurable channels, which makes it an ideal, high-efficiency spare part replacing either pure digital input (ER1008) or pure digital output (ER2008) units in machine modifications. Note that TwinCAT ESI (EtherCAT Slave Information) configurations must specifically define the operational profile (Input vs. Output mode) for each channel to match the physical wiring.
Thermal management inside completely enclosed, non-ventilated routing channels must be monitored closely. Although rated up to +60 degC ambient, driving all 8 outputs at their maximum 0.5 A inductive rating simultaneously causes significant localized heating within the cast housing. Ensure proper spacing or metallic surface heat sinking is utilized if cumulative output current exceeds 3.0 A.
During commissioning, verify that the Us (system power) and Up (load power) loops are isolated appropriately if safety relays are installed. A common fault is tying Us and Up to the same field supply line, which overrides safety-related external output de-energization loops. Always torque all M8 connectors to exactly 0.4 Nm to preserve environmental sealing.
Global Express Shipping
Returns & Warranty
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| Country of origin |
Germany
|