Teracom Product Name TSM400-1-TH Model Number TSM400-1-TH TSM400-1-TH 1 Wire Temperature and Humidity Sensor User Manual
Table of Contents
TSM400-1-TH 1-Wire temperature and humidity sensor Version 1.2 / March 2023
USER MANUAL
www.teracomsystems.com
Short description
TSM400-1-TH is a temperature and humidity sensor that supports the 1-Wire
protocol. A unique capacitive element is used for measuring relative humidity
while the temperature is measured by a band gap sensor. Both sensors are
seamlessly coupled to a 12-bit analog to digital converter. This results in
superior signal quality.
The TSM400-4-TH sensor is housed in a slim plastic enclosure. The bottom part
of the enclosure is suitable for installation on standard flush-mounted/cavity
wall boxes ø68mm, with installation openings on 61 mm.
Features
- LED indicator for status of communication
- Excellent long-term stability
- Firmware update with Teracom controller via the 1-Wire interface
Applications
- Environmental quality monitoring and assessment for offices.
- Humidity and temperature monitoring in building management systems.
- Smart ventilation systems.
Specifications
-
Physical characteristics
Dimensions: 81 x 81 x 30 mm
Weight: 66 g -
Environmental limits
Operating temperature range: -20 to 60°C
Operating relative humidity range: 10 to 90% (non-condensing) *
Long term drift typical: ±0.25 %RH/year, ±0.05 °C /year **
Storage temperature range: -20 to 60°C
Storage relative humidity range: 10 to 90% (non-condensing)
Ingress protection: IP20 -
Power requirements
Operating voltage range (including -15/+20% according to IEC 62368-1): 4.5 to 26 VDC
Current consumption: 10 mA@5VDC -
Humidity measurements
Accuracy (min): ±3.0 %RH (in 20 to 80 %RH range)
Accuracy (max): ±5.0 %RH (in 10 to 90 %RH range) *
Resolution: 0.1 %RH -
Temperature measurements
Accuracy (min): ±0.4 °C (in -10 to +60°C range)
Accuracy (max): ±0.6 °C (in -20 to +60°C range)
Resolution: 0.1 °C -
Warranty
Warranty period: 3 years -
Recommended operating range is 20% to 80% RH (non-condensing) over –10 °C to 60 °C Prolonged operation beyond these ranges may result in a shift of sensor reading, with slow recovery time.
** Higher drift values might occur due to contaminant environments with vaporized solvents, out-gassing tapes, adhesives, packaging materials, etc.
Pinout
| Pin| Description| UTP wires color
---|---|---|---
1-W| 1-Wire data| Green
+5÷30V| Positive power supply| Orange
GND| Ground (negative) supply| Green/White tracer
Orange/White Tracer
A+| Not used|
B-| Not used|
TERM| Not used|
Installation
It is strongly recommended to use UTP/FTP cables and daisy-chained (linear) topology for multiple sensors and keep the total cable length up to 30 meters.
“Star” topology can be used only as a last resort for up to 4 sensors and a total cable length of up to 10 meters.
Status indicator
The status of the device is shown by a single LED, located inside the box:
- If the LED blinks for a period of 1 second, the sensor works properly;
- If the LED blinks for a period of 3 seconds, there isn‘t communication with the controller;
- If the LED doesn’t blink, there isn’t a power supply.
Installation tips
The location and the mounting position of sensors have a direct effect on the
accuracy of the
measurements. The tips below will ensure good measuring results:
- The 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;
- The sensors shall be installed in a place with sufficient air circulation.
1-Wire is a registered trademark of Maxim Integrated Products, Inc. It is
strongly recommended to read Maxim’s 1-Wire tips at
https://teracomsystems.com/wp-content/uploads/AN148.pdf .
TSM400-1-TH sensor is intended for installation on a cavity wall box with 68mm
diameter and 61 mm screw spacing.
Firmware update
The firmware of the sensor can be updated with any Teracom controller which supports a 1-Wire interface. For more details ask your dealer.
Recycling
Recycle all applicable material.
Do not dispose of regular household refuse.
TSM400-1-TH_R1.2 – March 2023