WAGO 750-377 PROFINET IO Fieldbus Coupler

Technical Overview

PROFINET IO fieldbus coupler with dual 10/100 Mbps RJ-45 ports. Supports 64 mixed I/O modules, PROFIsafe, and PROFIenergy.

Key Features

PROFINET IO communication protocol.
Dual Ethernet (RJ-45) ports with built-in switch for line topology.
Supports mixed arrangement of analog and digital modules.
Device name configurable via DIP switch or PROFINET DCP.
Support for PROFIsafe V2 and PROFIenergy profile V1.0.
Good efficiency and 500 V isolation performance.
Diagnostics and standard status LEDs.
Max. 64 I/O modules per node.
Max. 256 bytes input / 256 bytes output process image.

Technical Specification Matrix

Parameter	Value
Fieldbus Protocol	PROFINET IO
Ethernet Speed	10/100 Mbps full duplex
Cable Type	Twisted-pair (Cat5 or better), 100 Ω
Maximum Number of I/O Modules per Node	64
I/O Process Image Size (Input / Output)	max. 256 bytes / 256 bytes
System (Fieldbus) Supply Voltage	24 VDC (-25 % … +30 %)
Current Consumption from System 5 V Side	~450 mA
Total Current for System Supply	~700 mA
Typical Input Current at Nominal Load (24 V)	~280 mA
Isolation Voltage (System vs Field)	500 V
Fieldbus / Communications Connection	2 × RJ-45
System Supply Connection	2 × CAGE-CLAMP®
Device Configuration Connection	1 × male connector (4-pole)
Wire Specifications – Solid / Stranded	0.08 … 1.5 mm² (AWG 28 … 14)
Wire Strip Length	~5 … 6 mm
Operating Temperature	-20 °C … +60 °C
Storage Temperature	-40 °C … +85 °C
Protection Rating	IP20
Relative Air Humidity (no condensation)	95 %
Vibration Resistance	4g (acc. to IEC 60068-2-6)
Shock Resistance	15g (acc. to IEC 60068-2-27)
Physical Weight (kg)	0.11
Dimensions L x W x H (cm)	7.19 x 4.95 x 9.68

Industrial Applications

1. Automated Production Lines (High-Speed I/O Integration)

In modern manufacturing, high-speed and reliable data exchange between PLCs and diverse field devices (sensors, actuators) is critical. This coupler facilitates the integration of various I/O modules onto a PROFINET network, allowing for real-time control and monitoring of production processes.

Problem Solved

Overcomes the complexity and cost of individual wiring for numerous I/O points by consolidating them into a single PROFINET node, while ensuring fast and deterministic communication required for time-sensitive automation tasks. The integrated 2-port switch simplifies network cabling in a line topology.

PROFINET IOReal-time Ethernet100 Mbit/s64 I/O modulesDual RJ-45Line topology24 VDC

2. Building Management Systems (Distributed I/O for HVAC/Lighting)

For large commercial or industrial buildings, distributed I/O is essential for controlling HVAC, lighting, and access systems efficiently. The WAGO 750-377 can serve as a PROFINET node to gather data from various sensors (temperature, light, occupancy) and control actuators (valves, dampers, relays) spread across different zones.

Problem Solved

Provides a robust and scalable solution for managing diverse building automation components over a standard industrial Ethernet. Its ability to handle mixed analog and digital signals, coupled with its compact DIN-rail design, makes it suitable for integration into control cabinets within equipment rooms or distribution panels, improving system responsiveness and reducing installation complexity.

PROFINET IOMixed analog/digital modulesIP2024 VDCDIN-rail mountingDistributed control

3. Process Control in Compact Machinery (Safety & Energy Monitoring)

In applications such as packaging machines, material handling equipment, or compact processing units, there's a need for integrated control, including safety functions and energy management. This coupler supports PROFIsafe for safety-critical I/O and PROFIenergy for energy consumption monitoring.

Problem Solved

Enables the consolidation of standard control, safety I/O, and energy data acquisition within a single PROFINET network. This simplifies wiring, reduces panel space (due to compact dimensions), and provides a unified communication infrastructure for both operational efficiency and compliance with safety standards, while operating reliably in typical industrial temperature ranges.

PROFIsafe V2PROFIenergy V1.0-20 °C to +60 °CIP20Max. 64 I/O modules24 VDCIndustrial robustness