TSM400-4-TH Description

TSM400-4-TH is a digital humidity and temperature sensor that supports MODBUS RTU protocol over the RS-485 interface. Its construction is suitable for wall mounting, making it a preferred choice for monitoring of server rooms, data centers, offices, stores etc.

Wall mounted internal Modbus Temperature and humidity sensor

The digital temperature and humidity sensor integrates basic elements as well as signals processing and provides a fully calibrated digital output. This results in superior measurement quality.

The sensing elements are factory calibrated and do not require any lifetime recalibration.

TSM400-4-TH supports widely used in Building Management Systems (BMS) and Industrial Automation Systems (IAS) Modbus RTU protocol. Each sensor has a unique serial code, which allows multi-sensors support over the same RS-485 bus.

The humidity and temperature sensor TSH400-4-TH is housed in a slim plastic enclosure. The bottom part of the enclosure is suitable for installation on standard flush-mounted/cavity wall boxes with a maximum installation opening of 61 mm.

Internal Temp and Humidity Features 

• LED indicator for status of communication;
• Long-term stability based on digital signal processing;
• 3.0% relative humidity accuracy;
• Changeable communication parameters;
• Non-volatile memory for all settings;
• Firmware update via the interface.

Applications

• Environmental quality monitoring and assessment for offices;
• Server room and data centers humidity and temperature monitoring;
• Indoor air quality systems;
• Humidity and temperature monitoring in building management systems (BMS). 

Server Room Temperature Sensor Installation

Pinout for installation

Install Overview

Two-Wire MODBUS definition according to modbus.org:
“A MODBUS solution over a serial line should implement a “Two-Wire” electrical interface in accordance with EIA/TIA-485 standard. On such a “Two-Wire” topology, at any time one driver only has the right for transmitting. In fact, a third conductor must also interconnect all the devices of the
bus - the common.

TSM400-4-TH install example

Install advice

The location and the mounting position of the sensor have a direct effect on the accuracy of the measurement. The tips below will ensure good measuring results: 
• Sensor shall be installed about 1.2-1.4 m above the floor; 
• To avoid solar radiation, the sensor should not be installed next to windows or directly in the sunlight; 
• Sensors shall be installed in a place with sufficient air circulation. 
TSM400-4-TH sensor is intended for installation on a cavity wall box with 68mm diameter and 61 mm screw spacing.

The following models support TSM400-4-CPTH

• 4G LTE universal IO moduleTCG140-4
• Energy monitoring moduleTCW260
• GSM-GPRS remote IO moduleTCG140
• Third-party controllers