WAGO 750-315 Fieldbus Coupler

Core Performance & Industrial Application

The WAGO 750-315 is a Modbus RTU fieldbus coupler connecting the 750 series modular I/O station to an RS-485 Modbus master.

It supports baud rates from 1.2 kBd to 115.2 kBd over a shielded copper bus segment up to 1200 m.

It maps up to 512 bytes input / 512 bytes output process image and supports up to 64 I/O modules per node (6000 I/O points, 99 master nodes).

The coupler provides 500 V isolation between system supply and field supply, with 10 A power-jumper contact capacity.

It mounts on a DIN-35 rail inside the control cabinet as spare replacement in distributed I/O networks.

Technical Specifications

▶ Product type: Modbus RTU fieldbus coupler

▶ Brand: WAGO

▶ Model: 750-315

▶ Protocol: Modbus RTU; RS-485, 1.2-115.2 kBd; bus segment max 1200 m

▶ Process image: 512 bytes in / 512 bytes out; 64 modules/node; 99 master nodes

▶ Supply voltage: 24 VDC (-25%/+30%); system current 1650 mA; input current 500 mA typ.

▶ Current consumption: 350 mA @5 V system supply; power jumper contacts 10 A

▶ Connection: 1 × D-sub 9 socket (Modbus), 4-pole config connector, CAGE CLAMP field/system supply

▶ Isolation: 500 V system/supply

▶ Operating temperature: 0℃ ~ +55℃; storage -25℃ ~ +85℃

▶ Mounting: DIN-35 rail, any position; size 100×71.1×50.5 mm; weight 195 g

▶ Protection rating: IP20; pollution degree 2

▶ Feature: Modbus RTU master communication, expandable 750 I/O family

▶ Country of origin: Germany

▶ Compliance: CE, UL certification

Industry Applications

Applied in Modbus RTU distributed I/O stations, machine and process control cabinet bus-node spare replacement.

Note: Confirm firmware revision and D-sub wiring against nameplate before ordering