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 ERI2339-0021 is a zinc die-cast IO-Link box designed for distributed digital signal processing in demanding industrial environments. Operating as an IO-Link device, this module features 16 digital channels that can be configured individually as either inputs or outputs. It interfaces with any standard IO-Link master via a secure M12 A-coded plug connection, facilitating efficient field-level communication and parameterization.
Engineered to the IO-Link Class B specification, the BECKHOFF ERI2339-0021 incorporates isolated supply paths to support both logic and auxiliary load power. Connection to field sensors and actuators is established via 16 M8 screw-type sockets. Its rugged metal enclosure provides superior mechanical stability and environmental protection, making the module suitable for cabinet-free installation directly on machinery.
| Parameter | Specification |
|---|---|
| Manufacturer | BECKHOFF |
| Model | ERI2339-0021 |
| Housing Material | Zinc die-cast |
| Protection Class | IP65/66/67 (conforms to EN 60529) |
| Dimensions (W x H x D) | 60 mm x 126 mm x 26.5 mm |
| Weight | approx. 450 g |
| Installation / Mounting | 2 fixing holes 3.5 mm (for M3), 2 fixing holes 4.5 mm (for M4) |
| Parameter | Specification |
|---|---|
| Communication Protocol | IO-Link |
| Specification Version | IO-Link V1.1, Class B |
| Interface Type | 1 x M12 plug, A-coded |
| Data Transfer Rate | 230.4 kbaud (COM 3) |
| Current Consumption (Logic) | typ. 100 mA from L+ |
| Auxiliary Power Current | typ. 20 mA + load |
| Electrical Isolation | L+ to P24: yes |
| Parameter | Specification |
|---|---|
| Number of Input Channels | Up to 16 (configurable) |
| Signal Voltage "0" | -3 to +5 V DC (EN 61131-2, type 3) |
| Signal Voltage "1" | 11 to 30 V DC (EN 61131-2, type 3) |
| Input Current | typ. 3 mA (EN 61131-2, type 3) |
| Input Filter Time | 3.0 ms (default), adjustable from 0 to 20 ms |
| Sensor Supply | From P24, max 0.5 A total, short-circuit proof |
| Parameter | Specification |
|---|---|
| Number of Output Channels | Up to 16 (configurable) |
| Rated Load Voltage | 24 V DC (-15 % / +20 %) |
| Load Types Supported | Ohmic, inductive, lamp load |
| Max. Output Current | 0.5 A per channel, individually short-circuit proof, total max 4.0 A |
| Short-Circuit Current Limit | max. 1.5 A |
| Parameter | Specification |
|---|---|
| Operating Temperature | -25 to +60 degC |
| Storage Temperature | -40 to +85 degC |
| Vibration Resistance | Conforms to EN 60068-2-6 |
| Shock Resistance | Conforms to EN 60068-2-27 |
| EMC Immunity / Emission | Conforms to EN 61000-6-2 / EN 61000-6-4 |
| Approvals and Markings | CE, UL |
The module interfaces directly to the field level and the control level through integrated IP67 connectors. All interfaces must be capped or sealed to maintain environmental protection ratings.
| Interface Type | Function |
|---|---|
| M12 Plug (A-coded) | Main IO-Link interface and power supply connection (Class B), supplying communication, logic, and output load power. |
| 16 x M8 Sockets | Configurable digital input/output channels. Screw-type connectors provide physical wiring to standard industrial sensors and actuators. |
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Returns & Warranty

The BECKHOFF ERI2339-0021 is a zinc die-cast IO-Link box designed for distributed digital signal processing in demanding industrial environments. Operating as an IO-Link device, this module features 16 digital channels that can be configured individually as either inputs or outputs. It interfaces with any standard IO-Link master via a secure M12 A-coded plug connection, facilitating efficient field-level communication and parameterization.
Engineered to the IO-Link Class B specification, the BECKHOFF ERI2339-0021 incorporates isolated supply paths to support both logic and auxiliary load power. Connection to field sensors and actuators is established via 16 M8 screw-type sockets. Its rugged metal enclosure provides superior mechanical stability and environmental protection, making the module suitable for cabinet-free installation directly on machinery.
| Parameter | Specification |
|---|---|
| Manufacturer | BECKHOFF |
| Model | ERI2339-0021 |
| Housing Material | Zinc die-cast |
| Protection Class | IP65/66/67 (conforms to EN 60529) |
| Dimensions (W x H x D) | 60 mm x 126 mm x 26.5 mm |
| Weight | approx. 450 g |
| Installation / Mounting | 2 fixing holes 3.5 mm (for M3), 2 fixing holes 4.5 mm (for M4) |
| Parameter | Specification |
|---|---|
| Communication Protocol | IO-Link |
| Specification Version | IO-Link V1.1, Class B |
| Interface Type | 1 x M12 plug, A-coded |
| Data Transfer Rate | 230.4 kbaud (COM 3) |
| Current Consumption (Logic) | typ. 100 mA from L+ |
| Auxiliary Power Current | typ. 20 mA + load |
| Electrical Isolation | L+ to P24: yes |
| Parameter | Specification |
|---|---|
| Number of Input Channels | Up to 16 (configurable) |
| Signal Voltage "0" | -3 to +5 V DC (EN 61131-2, type 3) |
| Signal Voltage "1" | 11 to 30 V DC (EN 61131-2, type 3) |
| Input Current | typ. 3 mA (EN 61131-2, type 3) |
| Input Filter Time | 3.0 ms (default), adjustable from 0 to 20 ms |
| Sensor Supply | From P24, max 0.5 A total, short-circuit proof |
| Parameter | Specification |
|---|---|
| Number of Output Channels | Up to 16 (configurable) |
| Rated Load Voltage | 24 V DC (-15 % / +20 %) |
| Load Types Supported | Ohmic, inductive, lamp load |
| Max. Output Current | 0.5 A per channel, individually short-circuit proof, total max 4.0 A |
| Short-Circuit Current Limit | max. 1.5 A |
| Parameter | Specification |
|---|---|
| Operating Temperature | -25 to +60 degC |
| Storage Temperature | -40 to +85 degC |
| Vibration Resistance | Conforms to EN 60068-2-6 |
| Shock Resistance | Conforms to EN 60068-2-27 |
| EMC Immunity / Emission | Conforms to EN 61000-6-2 / EN 61000-6-4 |
| Approvals and Markings | CE, UL |
The module interfaces directly to the field level and the control level through integrated IP67 connectors. All interfaces must be capped or sealed to maintain environmental protection ratings.
| Interface Type | Function |
|---|---|
| M12 Plug (A-coded) | Main IO-Link interface and power supply connection (Class B), supplying communication, logic, and output load power. |
| 16 x M8 Sockets | Configurable digital input/output channels. Screw-type connectors provide physical wiring to standard industrial sensors and actuators. |
Global Express Shipping
Returns & Warranty
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For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
Germany
|