Purchase now: Wago 750-338 CANopen Fieldbus Coupler
Purchase now: Atlantech Drives provides you the Wago 750-338, a robust **CANopen Fieldbus Coupler** designed for heavy-duty industrial networking. While other couplers use terminal blocks, the 750-338 features a standard **D-Sub 9 Female Connector** for the fieldbus interface. This ensures a secure, vibration-proof connection compatible with standard CAN cabling harnesses used in automotive production lines, mobile machinery, and building automation.
Technical Specifications and Configuration
The 750-338 acts as a Slave device in the CANopen network (DS 301). It supports automatic baud rate detection ranging from **10 kbaud to 1 Mbaud**. The Node ID (address) is set via clearly visible **DIP switches** (1 to 127). The coupler manages the entire Wago 750 I/O node, mapping analog and digital data into **PDOs (Process Data Objects)** and supporting **SDOs** for parameterization. It provides 24V DC power to the attached I/O modules via the internal data contacts.
- Part Number: 750-338.
- Protocol: CANopen (DS 301).
- Connection: D-Sub 9 (Female).
- Baud Rate: 10 k…1 Mbaud (Auto/Manual).
- PDOs: 5 Tx / 5 Rx (Dynamic mapping).
- Input Process Image: Max 512 bytes.
- Output Process Image: Max 512 bytes.
- Supply Voltage: 24 V DC.
- Diagnostic: LEDs for CAN status (Run, Error).
Expert Tips: D-Sub Termination
CANopen requires a linear topology. Expert Tip: Since the 750-338 uses a D-Sub connector, the 120 Ohm termination resistor is NOT built-in. You must use a **D-Sub connector with a switchable termination resistor** (like the Wago 750-960 or similar) if this coupler is at the end of the line. Flipping the switch on the cable connector engages the resistor; forgetting this is the #1 cause of communication errors.
Frequently Asked Questions (FAQs)
Q: Does it support CAN layer 2?
A: Yes, via specific configuration, but it is primarily designed as a CANopen device (Layer 7 application protocol).
Q: Can I replace a 750-337 with this?
A: Functionally yes, but physically no. The 750-337 uses MCS terminals, while this 750-338 uses a D-Sub plug. You would need to change the cable end.
Do you need more references from this brand? Explore our full catalog of Wago here.
