Overview
The ZS-RTU-1600P is an industrial-grade multi-point temperature and humidity acquisition unit designed to convert data from DS18B20 and similar temperature/humidity sensors into the standard MODBUS protocol. This allows convenient data parsing by upper-level systems such as SCADA software, monitoring interfaces, HMI panels, and PLCs.
It adopts Zhaosui's fourth-generation driving circuit and firmware, specially optimized for environments with strong electromagnetic interference, long-distance wiring requirements, and sensor immersion conditions. The device can drive temperature sensors over extension cables exceeding 1600 meters and can collect data from up to 510 temperature and humidity sensing points. With multiple adjustable internal parameters, it achieves stable performance across a wide range of industrial interference environments.
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Operating Temperature |
-30° to 80° (Up to -40° to 80° in single-point mode) |
Maximum Driving Distance |
1600M(DS18B20/GX18B20/HK1020) 1200M(CT1820) |
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Power Supply Voltage |
9–36 VDC (some models 18–36 VDC) |
Installation Method |
DIN-rail buckle mounting |
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Temperature Resolution |
0.1°C |
Dimensions (L × W) |
13CM*10CM |
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Communication Interfaces |
2× RS-485 ports (dual independent MODBUS masters) 1× Type-C port 1× TCP port |
Sensor Input Method |
Supports 3-wire mode (powered) Supports 2-wire mode (parasitic) Note: Some sensor models do not support 2-wire mode |
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Temperature Channels |
8 channels (up to 255 points per channel) |
Communication Parameters |
9600 bps, 8 data bits, 1 stop bit, no parity |
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Output Signal |
MODBUS-RTU, MODBUS-TCP, or custom protocol |
Temperature Conversion Time |
3.5 s per 200 points (centralized mode) 1 s per point (single-point mode) |
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Isolation Design |
RS-485 optocoupler isolation RS-485 power isolation Main power isolation Software-level isolation for measurement channels |
Selectable Working Modes |
Centralized MODBUS reading mode Single-point MODBUS reading mode API debugging mode |
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Supported Sensor Chips |
DS18B20 / CT1820 / QT18B20 / GX18B20 / MY18B20 (new version) / HK1020 / RT18B20 (temperature) GHT3W / CHT-1305 / SHT31 single-bus version (temperature & humidity) |
Additional Features |
Sensor ID modification Leakage-switch function Anti-interference mode Echo-stabilization DIP switch Chinese-English translation support |
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