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 BECKHOFF EP2339-0021 is an industrial EtherCAT Box module designed for decentralized automation architectures. It features 16 digital channels that can be configured individually as either inputs or outputs, providing flexible system integration at the field level. By eliminating the need for a protective control cabinet, this device enables direct mounting on machines and equipment in challenging industrial environments.
This EtherCAT Box interfaces with the control network through shielded M8 connections, supporting high-speed communication and deterministic data transfer. The digital inputs conform to the EN 61131-2 Type 1/3 specification, while the digital outputs handle up to 0.5 A per channel, making the module suitable for interfacing with a wide range of industrial sensors, actuators, and valves.
| Parameter | Specification |
|---|---|
| Manufacturer | BECKHOFF |
| Model | EP2339-0021 |
| Product Type | EtherCAT Box (Configurable Digital I/O) |
| Housing Material | PA6 (Polyamide) |
| Protection Rating | IP65, IP66, IP67 (conforms to EN 60529) |
| Parameter | Specification |
|---|---|
| Number of Channels | 16 digital inputs or outputs, configurable |
| Input Specification | EN 61131-2, Type 1/3 |
| Input Filter Time | 3.0 ms |
| "0" Signal Voltage | -3 to +5 V |
| "1" Signal Voltage | 11 to 30 V (6 mA input current, Type 3) |
| Sensor Supply | From load supply voltage, max. 0.5 A total, short-circuit proof |
| Output Load Type | Ohmic, inductive, lamp load |
| Max. Output Current | 0.5 A per channel, individually short-circuit proof (sum max. 4 A) |
| Switching Times | Typ. TON: 60 microseconds, typ. TOFF: 300 microseconds |
| Short-circuit Current | Typ. 1.5 A |
| Parameter | Specification |
|---|---|
| Rated Load Voltage | 24 V DC (-15% / +20%) |
| Current Consumption from US | 120 mA |
| Auxiliary Power Current | Typ. 20 mA + load |
| Electrical Isolation | 500 V |
| Parameter | Specification |
|---|---|
| Protocol | EtherCAT |
| Bus Interface Connection | 2 x M8 socket, shielded, screw type |
| Power Supply Connection | Feed: 1 x M8 male, 4-pin; Downstream: 1 x M8 female, 4-pin |
| Parameter | Specification |
|---|---|
| Dimensions (W x H x D) | 60 mm x 126 mm x 26.5 mm |
| Weight | Approx. 250 g |
| Operating Temperature | -25 to +60 Celsius |
| Storage Temperature | -40 to +85 Celsius |
| Vibration/Shock Resistance | Conforms to EN 60068-2-6 / EN 60068-2-27 |
| EMC Immunity/Emission | Conforms to EN 61000-6-2 / EN 61000-6-4 |
| Installation Mounting | 2 x 3.5 mm holes for M3; 2 x 4.5 mm holes for M4 |
| Interface | Connection Type |
|---|---|
| Input/Output Channels 1 to 16 | 16 x M8, 3-pin, A-coded sockets |
| EtherCAT Input/Output (Bus) | 2 x M8 sockets, shielded, screw type |
| Control/Sensor Power Feed | 1 x M8 male connector, 4-pin |
| Power Downstream Link | 1 x M8 female socket, 4-pin |
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Returns & Warranty

The BECKHOFF EP2339-0021 is an industrial EtherCAT Box module designed for decentralized automation architectures. It features 16 digital channels that can be configured individually as either inputs or outputs, providing flexible system integration at the field level. By eliminating the need for a protective control cabinet, this device enables direct mounting on machines and equipment in challenging industrial environments.
This EtherCAT Box interfaces with the control network through shielded M8 connections, supporting high-speed communication and deterministic data transfer. The digital inputs conform to the EN 61131-2 Type 1/3 specification, while the digital outputs handle up to 0.5 A per channel, making the module suitable for interfacing with a wide range of industrial sensors, actuators, and valves.
| Parameter | Specification |
|---|---|
| Manufacturer | BECKHOFF |
| Model | EP2339-0021 |
| Product Type | EtherCAT Box (Configurable Digital I/O) |
| Housing Material | PA6 (Polyamide) |
| Protection Rating | IP65, IP66, IP67 (conforms to EN 60529) |
| Parameter | Specification |
|---|---|
| Number of Channels | 16 digital inputs or outputs, configurable |
| Input Specification | EN 61131-2, Type 1/3 |
| Input Filter Time | 3.0 ms |
| "0" Signal Voltage | -3 to +5 V |
| "1" Signal Voltage | 11 to 30 V (6 mA input current, Type 3) |
| Sensor Supply | From load supply voltage, max. 0.5 A total, short-circuit proof |
| Output Load Type | Ohmic, inductive, lamp load |
| Max. Output Current | 0.5 A per channel, individually short-circuit proof (sum max. 4 A) |
| Switching Times | Typ. TON: 60 microseconds, typ. TOFF: 300 microseconds |
| Short-circuit Current | Typ. 1.5 A |
| Parameter | Specification |
|---|---|
| Rated Load Voltage | 24 V DC (-15% / +20%) |
| Current Consumption from US | 120 mA |
| Auxiliary Power Current | Typ. 20 mA + load |
| Electrical Isolation | 500 V |
| Parameter | Specification |
|---|---|
| Protocol | EtherCAT |
| Bus Interface Connection | 2 x M8 socket, shielded, screw type |
| Power Supply Connection | Feed: 1 x M8 male, 4-pin; Downstream: 1 x M8 female, 4-pin |
| Parameter | Specification |
|---|---|
| Dimensions (W x H x D) | 60 mm x 126 mm x 26.5 mm |
| Weight | Approx. 250 g |
| Operating Temperature | -25 to +60 Celsius |
| Storage Temperature | -40 to +85 Celsius |
| Vibration/Shock Resistance | Conforms to EN 60068-2-6 / EN 60068-2-27 |
| EMC Immunity/Emission | Conforms to EN 61000-6-2 / EN 61000-6-4 |
| Installation Mounting | 2 x 3.5 mm holes for M3; 2 x 4.5 mm holes for M4 |
| Interface | Connection Type |
|---|---|
| Input/Output Channels 1 to 16 | 16 x M8, 3-pin, A-coded sockets |
| EtherCAT Input/Output (Bus) | 2 x M8 sockets, shielded, screw type |
| Control/Sensor Power Feed | 1 x M8 male connector, 4-pin |
| Power Downstream Link | 1 x M8 female socket, 4-pin |
Global Express Shipping
Returns & Warranty
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| Country of origin |
Germany
|