TERACOM TSH330 IP54 Modbus RTU Temperature and Humidity Sensor
Short description
TSH330 is an IP54 temperature and humidity sensor with an RS-485 interface. It supports the Modbus RTU protocol.
The temperature and humidity sensor integrates basic elements plus signal processing and provides a fully calibrated digital output. A unique capacitive element is used for measuring relative humidity while the temperature is measured by a bandgap element. Both elements are seamlessly coupled to a 12-bit analog to digital converter. This results in superior signal quality.
The digital sensor is mounted in an IP65-rated enclosure. This provides protection against dust and water sprays. A cable gland with locknut and screwless terminal block allows easy cable installation.
Features
- RS-485 interface carrying up to 32 nods;
- LED indicator for status of communication;
- Changeable bitrate and other communication parameters;
- Firmware update via the interface.
Applications
- Server room and data centers humidity and temperature logging.
- Environmental quality monitoring and assessment.
- Humidity and temperature monitoring in building management systems.
- Humidity and temperature logging for mobile operator facilities, vineyards, greenhouses, etc.
Specifications
- Physical characteristics
- Dimensions: 65.6 x 99 x 36 mm
- Weight: 70 g
- Environmental limits
Operating temperature range: -20 to 60°C
Operating relative humidity range: 5 to 95% (non-condensing)
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.
It is possible that in some weather conditions the moisture in the air in the filter cap may condense. This may result in a shift of sensor reading, with slow recovery time.
Storage temperature range: -20 to 60°C
Storage relative humidity range: 5 to 95% (non-condensing)
Ingress protection: IP54 - Power requirements
Input Voltage (including -15/+20% according to IEC 62368-1): 4.5 to 26 VDC Input Current: 5 mA@5VDC - Humidity measurements
Accuracy (min): ±3.0 %RH (in 20 to 80 %RH range)
Accuracy (max): ±5.0 %RH (in 5 to 95 %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
Pinout
Installation
The device is designed for wall mounting using screws passing through the slotted holes in the enclosure.
A daisy-chained (linear) topology for multiple sensors should be used. UTP/FTP cables are mandatory for interconnection. The last sensor in the chain should have a terminator of 120ohm installed on the bus. TSH330 has a built-in terminator. To enable it, please close the jumper. 
Installation tips
The location and the mounting position of sensors have a direct effect on the accuracy of measurements. The tips below will ensure good measuring results:
- Sensor shall be installed about 1.2-1.4 m above the floor;
- Avoid exposure to direct sunlight – solar radiation causes measurement inaccuracy;
- For outdoor usage, the sensors should be installed with protection from direct rain;
- Avoid mounting over ventilation shafts and windows/doors;
- Avoid attaching to walls in front of a chimney.
- It is recommended to mount the device in an accessible location for easier maintenance.
Attention:
The device should be installed with always filter and gland facing the floor.
Status indicator
The status of the device is shown by a single LED, located on the front panel:
- 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 LED doesn‘t blink, there isn‘t a power supply.
Factory default settings
Disconnect the sensor from the bus (switch off the power supply).
Press and hold the “config” button. Don’t release the button, connecting the sensor to the bus (switch on the power supply).
The “status” LED will be ON for 3 seconds and after this will flash for 7 seconds. After the 10-th second the LED will be ON.
Release the button. The sensor will restart with factory default settings.
Firmware update
The firmware of the sensor can be updated with a Teracom controller which supports MODBUS RTU or MBRTU-Config software. For more details ask your dealer.
Modbus address table
|
Register name |
R/W |
FC |
PDU
Address (Decimal) |
Logical
address (Decimal) |
Offset (Decimal) |
Data size |
Default |
Valid values |
| RS-485 address | R/W | 03/06 | 10 | 40011 | 40001 | 16-bit uns. integer | 1 | 1-247 |
| Baud rate * | R/W | 03/06 | 11 | 40012 | 40001 | 16-bit uns. integer | 19200 | 2400, 4800, 9600, 19200,
38400, 57600 |
| Parity, data, stop bits * | R/W | 03/06 | 12 | 40013 | 40001 | 16-bit uns. integer | 1 | 1=E81, 2=O81, 3=N81 |
| Data order | R/W | 03/06 | 13 | 40014 | 40001 | 16-bit uns. integer | 1 | 1=MSWF (MSW, LSW)
2=LSWF (LSW, MSW) |
| Sub-family number | R | 3 | 14 | 40015 | 40001 | 16-bit uns. integer | 0xCD | |
| FW version | R | 3 | 15 | 40016 | 40001 | 16-bit uns. integer | ||
| Vendor URL | R | 3 | 18 | 40019 | 40001 | 64 bytes UTF-8 | teracomsystems.com | |
| Float test value (MSWF) | R | 3 | 82 | 40083 | 40001 | 32-bit float | -9.9(0xC11E6666) | |
| Float test value (LSWF) | R | 3 | 84 | 40085 | 40001 | 32-bit float | -9.9(0xC11E6666) | |
| Signed integer test value | R | 3 | 86 | 40087 | 40001 | 16-bit sig. integer | -999(0xFC19) | |
| Signed integer test value (MSWF) | R | 3 | 87 | 40088 | 40001 | 32-bit sig. integer | -99999(0xFFFE7961) | |
| Signed integer test value (LSWF) | R | 3 | 89 | 40090 | 40001 | 32-bit sig. integer | -99999(0xFFFE7961) | |
| Unsigned integer test value | R | 3 | 91 | 40092 | 40001 | 16-bit uns. integer | 999(0x03E7) | |
| Unsigned integer test value (MSWF) | R | 3 | 92 | 40093 | 40001 | 32-bit uns. integer | 99999(0x0001869F) | |
| Unsigned integer test value (LSWF) | R | 3 | 94 | 40095 | 40001 | 32-bit uns. integer | 99999(0x0001869F) | |
| Temperature °C | R | 3 | 100 | 40101 | 40001 | 32-bit float | ||
| Humidity %RH | R | 3 | 102 | 40103 | 40001 | 32-bit float | ||
| Dew point °C | R | 3 | 104 | 40105 | 40001 | 32-bit float | ||
| Temperature °F | R | 3 | 200 | 40201 | 40001 | 32-bit float | ||
| Humidity %RH | R | 3 | 202 | 40203 | 40001 | 32-bit float | ||
| Dew point °F | R | 3 | 204 | 40205 | 40001 | 32-bit float | ||
| Temperature °C x 100 | R | 3 | 400 | 40401 | 40001 | 16-bit sig. integer | ||
| Humidity %RH x 100 | R | 3 | 401 | 40402 | 40001 | 16-bit sig. integer | ||
| Dew point °C x 100 | R | 3 | 402 | 40403 | 40001 | 16-bit sig. integer | ||
| Temperature °F x 100 | R | 3 | 500 | 40501 | 40001 | 16-bit sig. integer | ||
| Humidity %RH x 100 | R | 3 | 501 | 40502 | 40001 | 16-bit sig. integer | ||
| Dew point °F x 100 | R | 3 | 502 | 40503 | 40001 | 16-bit sig. integer |
MSWF – Most significant word first – (bits 31 … 16), (bits 15 … 0); LSWF – Least significant word first – (bits 15 … 0), (bits 31 … 16); PDU address – Actual address bytes used in a Modbus Protocol Data unit
A “NaN” value is returned for unavailable floating-point values (e.g. in case of measurement error)
- The settings will take effect after restarting the sensor by a power-on reset.
Recycling
Recycle all applicable material.
Do not dispose of in the regular household refuse.
Documents / Resources
 |
TERACOM TSH330 IP54 Modbus RTU Temperature and Humidity Sensor [pdf] User Manual TSH330, IP54 Modbus RTU Temperature and Humidity Sensor, TSH330 IP54 Modbus RTU Temperature and Humidity Sensor, Modbus RTU Temperature and Humidity Sensor, RTU Temperature and Humidity Sensor, Humidity Sensor |
