Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 750-338 |
| Manufacturer | WAGO |
| Product Type | Fieldbus Coupler (head station) for CANopen, D-Sub fieldbus connection |
| Series / Platform | WAGO-I/O-SYSTEM 750 / 753 |
| Communication | CANopen, communication profile DS-301 V4.1, device profile DS-401 V2.0 |
| Baud Rate | 10 kBd … 1 MBd |
| Fieldbus Nodes on Master (max.) | 110 |
| Modules per Node (max.) | 64 |
| Bus Segment Length (max.) | 1000 m (baud-rate and cable dependent) |
| Transmission Medium | Shielded Cu cable 3 × 0.25 mm² |
| Process Image (max.) | 512 bytes input / 512 bytes output |
| PDO / SDO Resources | 32 Tx PDOs / 32 Rx PDOs, 2 SDO servers, standard COB ID distribution |
| Node ID / Baud Setting | DIP switch |
| Supply Voltage (system) | 24 V DC (-25 … +30 %), via pluggable CAGE CLAMP connector |
| Supply Voltage (field) | 24 V DC (-25 … +30 %), via power jumper contacts |
| Current Consumption | 350 mA (5 V system supply); 500 mA typ. input current at nominal load (24 V) |
| Total Current (system supply) | 1,650 mA |
| Isolation | 500 V system / field |
| Power Jumper Contacts | 3 outgoing, 10 A current carrying capacity |
| Fieldbus Connection | 1 × D-sub 9-pin plug |
| System / Field Supply Connection | 2 × CAGE CLAMP / 6 × CAGE CLAMP; 0.08 … 2.5 mm² (28 … 14 AWG) |
| Dimensions (W × H × D) | 50.5 mm × 100 mm × 71.1 mm |
| Weight | 177 g |
| Mounting | DIN-35 rail |
| Operating / Storage Temperature | 0 … +55 °C / -25 … +85 °C |
| Protection Type | IP20, pollution degree 2 per IEC 61131-2 |
| Vibration / Shock Resistance | 4 g per IEC 60068-2-6 / 15 g per IEC 60068-2-27 |
| Conformity Marking | CE |
Main Features and Advantages
Plug-and-play node assembly: The WAGO 750-338 removes almost every manual addressing step from commissioning. On power-up it scans the internal bus, recognises each I/O module by its electronic type code, and assembles a local process image automatically. Digital signals are packed bit by bit and, once more than eight bits accumulate, the coupler starts a new byte; analog and speciality modules are transferred as words or bytes in the order they are mounted. The result is that a technician can extend or re-arrange a node mechanically and the coupler rebuilds the image without a single DIP-switch or software address change.Flexible CANopen data mapping: With 32 transmit and 32 receive PDOs, two SDO servers and free mapping of every object dictionary entry, the WAGO 750-338 adapts to the master’s expectations instead of forcing the master to adapt to it. Variable PDO mapping, edge-triggered PDOs, limit value monitoring and a configurable response in the event of an error allow designers to build lean, event-driven communication rather than wasting bandwidth on a fixed cyclic image, while emergency messages and life guarding give the controller immediate visibility of node health.Robust industrial design: Isolation of 500 V between the system and field sides, plus a DC/DC converter and optocouplers on the CAN interface, keeps the WAGO 750-338 stable in cabinets shared with drives and contactors. Its 24 V DC supply tolerates -25 % to +30 %, so voltage dips during motor starting do not reset the node. CAGE CLAMP spring terminals hold conductors from 0.08 to 2.5 mm² without periodic retightening, the housing of polycarbonate and polyamide 6.6 resists shock and vibration to 4 g and 15 g respectively, and the compact 50.5 mm width keeps panel space requirements low.Clear diagnostics and easy service: LEDs for RUN, STOP, Tx/Rx overflow and I/O status, together with separate indicators for system and field voltage, tell a maintenance engineer at a glance whether the WAGO 750-338 is operational, in STOP state, suffering buffer overflow or reporting a module fault. A configuration interface behind the front flap allows firmware updates and parameter work with WAGO-I/O-CHECK, and because the coupler is a pure head station, replacing it does not disturb the wiring of the I/O modules behind it.
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