ZS-RTU-200W (Single-Channel Industrial Temperature & Humidity Data Collector)

Key Features

• Single-channel data acquisition: Supports up to 200 digital temperature and humidity measurement points.
• Long-distance sensor communication: Supports extension cable lengths exceeding 1,500 meters with compatible sensors.
• Optional power isolation: Available in isolated and non-isolated versions to accommodate different installation requirements.
• Modbus RTU communication: Converts digital sensor readings into standard Modbus RTU data for integration with PLCs, SCADA systems, HMIs, and industrial monitoring software.
• RS-485 communication interface: Provides industrial serial connectivity.
• Dual baud rate support: Supports 9,600 and 115,200 bps.
• Enhanced interference resistance: Designed for stable operation in environments with strong electromagnetic interference.
• Improved sensor reliability in wet environments: Specialized driving circuitry helps reduce electrical stress on sensors exposed to moisture.
• Two- and three-wire sensor compatibility: Supports both parasite-powered and externally powered digital sensors, depending on sensor compatibility.
• High-capacity sensor conversion: Supports simultaneous conversion of up to 200 temperature measurement points.
• Automatic fault recovery: Includes short-circuit protection and recovery following temporary wiring faults.
• Surge protection: Protective circuitry for power, communication, and sensor connections.
• Configurable operating modes: Supports simultaneous multipoint acquisition, individual sensor reading, and diagnostic operation.
• DIN rail mounting: Compact industrial enclosure for control cabinet installation.

Additional Details

The ZS-RTU-200W is a single-channel industrial temperature and humidity data collector designed for long-distance, multipoint digital sensor networks.

The collector acquires measurement data from up to 200 compatible digital temperature and humidity sensors, including DS18B20-based devices, and converts the readings into standard Modbus RTU data. This enables straightforward integration with programmable logic controllers (PLCs), SCADA systems, human-machine interfaces (HMIs), and industrial monitoring software.

Built around fourth-generation sensor-driving circuitry and firmware, the ZS-RTU-200W is engineered to maintain stable communication across extended cable runs and electrically demanding installations. Its high-drive sensor interface supports cable lengths exceeding 1,500 meters under suitable conditions, reducing the need for additional data acquisition equipment in distributed monitoring systems.

The collector is available in both isolated and non-isolated configurations, allowing users to select the appropriate electrical protection for their installation. The isolated version incorporates power and RS-485 isolation to reduce the effects of electrical noise and interference.

Integrated interference-suppression functions, configurable signal-discharge settings, and automatic recovery from temporary wiring faults help maintain reliable operation in environments containing large motors, variable-frequency drives, transformers, and other sources of electromagnetic interference.

The ZS-RTU-200W also supports specialized operating modes for challenging sensor networks. Simultaneous acquisition enables efficient monitoring of large sensor groups, while single-point conversion reduces instantaneous power demand on long or degraded sensor cables.

For installations where sensors are exposed to moisture, the collector's optimized driving circuitry and protective functions are designed to reduce electrical stress and help extend sensor service life.

With its compact DIN rail-mounted enclosure, RS-485 communication interface, and standard Modbus RTU output, the ZS-RTU-200W provides a practical solution for industrial temperature monitoring, power cable infrastructure, water storage systems, geothermal installations, and other distributed sensor applications.

Technical Specifications

Product model	ZS-RTU-200W
Product type	Industrial multipoint temperature and humidity data collector
Measurement channels	1
Maximum sensor capacity	200 measurement points
Maximum extension cable length	1,500 m nominal; longer distances possible under suitable conditions
Supported sensor wiring	2-wire parasite power / 3-wire external power
Power supply	9–36 V DC (some versions require 18–36 V DC)
Operating temperature	-30°C to 80°C (-40°C to 80°C in single-point mode)
Temperature display resolution	0.1°C
Communication interface	RS-485
Communication protocol	Modbus RTU / custom protocol
Supported baud rates	9,600 / 115,200 bps
Serial format	8 data bits, 1 stop bit, no parity
Default Modbus address	1
Temperature register range	30001–30200 (Function Code 04)
Humidity register range	40001–40200 (Function Code 03)
Temperature register scaling	×0.1°C
Humidity register scaling	×0.01% RH
Multipoint conversion time	3.5 seconds per 200 points
Single-point conversion time	1 second per point
Isolation options	Isolated / non-isolated versions
Available operating modes	Multipoint Modbus, single-point Modbus, API diagnostic mode
Sensor identification editing	Supported
Signal-discharge function	Supported
Short-circuit protection	Supported
Mounting	DIN rail
Dimensions	53 × 82 mm
Compatible temperature sensors	DS18B20, CT1820, QT18B20, GX18B20, MY18B20 (new version), HK1020, RT18B20
Compatible temperature/humidity sensors	GHT3W, CHT-1305, SHT31 (1-Wire version)

Typical Applications

• Industrial multipoint temperature monitoring
• Power cable trenches and electrical infrastructure
• Water storage tanks and reservoirs
• Geothermal and ground-freezing installations
• Coal storage temperature monitoring
• Long-distance digital sensor networks
• Industrial equipment operating in high-interference environments