WAGO 750-652 RS-232/485 Serial Interface Module

Technical Overview

WAGO 750-652 is an RS-232/422/485 serial interface module for WAGO-I/O-SYSTEM 750, supporting flexible baud rates.

Key Features

Transparent communication to fieldbus systems supported by the WAGO-I/O-SYSTEM 750.
Connects RS-232, RS-422, and RS-485 devices.
Adjustable parity (none/even/odd), data bits (7/8), and stop bits (1/2).
Flexible baud rate selection from 300 Bd to 115.2 kBd.
Module configurable via WAGO-I/O-CHECK or GSD files.
Designed for DIN-35 rail mounting.
5 VDC system supply, 85 mA current consumption.
IP20 protection type.

Technical Specification Matrix

Parameter	Value
Supply voltage (system)	5 VDC
Current consumption (5 V system supply)	85 mA
Number of data bits	7/8, adjustable
Number of stop bits	1/2, adjustable
Input buffer	2560 bytes
Output buffer	512 bytes
Baud rate	300 Bd … 115.2 kBd (default 9600 Baud)
Bit transfer	RS-485/-422: ISO 8482 / DIN 66259 - 4; RS-232: EIA/TIA-232-F
Line length (RS-485/-422)	approx. 1000 m (max.) twisted pair
Line length (RS-232)	40 m (max.)
Ambient temperature (operation)	0 … +55 °C
Protection type	IP20
Isolation	500 V system/field
Physical Weight (kg)	0.05
Dimensions L x W x H (cm)	10 x 6.78 x 1.2

Industrial Applications

1. Industrial Machine Control with Legacy Devices

Integrate older machinery or specialized sensors/actuators that use RS-232 or RS-485 into a modern WAGO-based PLC control system for unified control and data acquisition.

Problem Solved

Overcomes incompatibility between modern industrial networks and legacy serial communication devices. The module's transparent communication and configurable parameters (baud rate, data bits, parity, stop bits) ensure seamless integration without requiring complex protocol converters or extensive reprogramming of existing serial devices.

RS-232RS-485PLC integrationLegacy systemsIndustrial automationData acquisitionFieldbus

2. Remote Data Logging from Distributed Sensors

Collect data from multiple, geographically distributed sensors (e.g., environmental monitors, specialized gauges) using RS-485 for long-distance, multi-drop communication, and integrate this data into a central WAGO control system for analysis and logging.

Problem Solved

Leverages RS-485's ability to communicate over long distances (up to 1000m) and support multiple devices. The 2560-byte input buffer handles bursts of data from various sensors, preventing data loss, crucial for reliable data logging in large industrial or environmental monitoring setups.

RS-485Distributed controlSensor networksData loggingLong-distance communicationInput bufferIndustrial IoT

3. Building Automation System for HVAC/Security Devices

Connect various building automation devices such as HVAC controllers, access control systems, or fire alarm panels that often use RS-485 or RS-232 for communication to a WAGO-I/O-System for centralized management and monitoring.

Problem Solved

Provides a flexible gateway for integrating disparate building management systems. For instance, a network of RS-485-based HVAC units can be brought into the WAGO system, allowing for energy management and remote diagnostics. The IP20 rating is suitable for installation within control cabinets found in building service rooms.

Building automationHVACAccess controlRS-485RS-232Centralized managementSystem integrationEnergy managementIP20