User Manual

TSM400-4-CPTH_R1.0 – August 2022 Page 3
•
CO
2
measurements
Range: 400 to 5000 ppm
Accuracy: ± (40 ppm + 5 %)
Resolution: 1 ppm
Calibration: Automatic, if the sensor is exposed to fresh air for more than 30 minutes.
•
Pressure measurements
Range: 10 to 1200 hPa
Accuracy (min): ±1.5 (25°C, 750 hPa)
Accuracy (max): ±2.5 (-20°C to + 85°C, 300 to 1100 hPa)
Resolution: 1 hPa
•
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
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.
•
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
5. Pinout
Pin
Description
UTP wires color
1-W
Not used
+5÷30V
Positive power supply
Brown/White Tracer
GND
Ground (negative) supply
Brown
A+
Line A+ of RS-485
Blue/White Tracer
B-
Line B- of RS-485
Blue
TERM
For termination, connect to B-
6. Installation
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.”