TERACOM TSM400-1-CP 1 Wire Carbon Dioxide Sensor User Manual

TSM400-1-CP 1 Wire Carbon Dioxide Sensor
**User Manual

**

www.teracomsystems.com

Short description

TSM400-1-CP is a multi-parameter sensor that supports the 1-Wire protocol. The sensor measures the concentration of carbon dioxide and atmospheric pressure. Both basic sensor elements, for carbon dioxide and pressure, used in the device are digital. This ensures high measurement accuracy and long-term stability. The basic sensing element for atmospheric pressure is factory calibrated and it does not require any lifetime recalibration. Automatic calibration is available for carbon dioxide measurements. TSH400-1-CP 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 61mm.

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
• CO2 pollution monitoring
• 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: 5 to 95% (non-condensing)
  Storage temperature range: -20 to 60°C
  Storage relative humidity range: 5 to 95% (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: 25 mA@5VDC (Peak: 150 mA@5VDC)

• CO2 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

• Warranty period: 3 years

Pinout

| Pin| Description| UTP wires color
---|---|---|---
1-W| 1-Wire data| Green
+5+30V| Positive power supply| Orange
GND| A 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.
Attention! Due to the high peak current, only one TSM400-1-CP sensor can be connected to a controller. The length of the cable between the controller and the sensor should not exceed 10 meters. If you want to connect more than one TSM400-1-CP sensor, please contact your supplier for technical guidance.
“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 http://www.maxim-ic.com/appnotes/index.mvp/id/148.
TSM400-1-CP 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.
10. 1-Wire scratchpad

| SCRATCHPAD| SCRATCHPAD EXAMPLE DATA
---|---|---
BYTE 0| CO2 LSB| OXBO
BYTE 1| CO2 MSB| 0X04
BYTE 2| Pressure LSB| OXE3
BYTE 3| Pressure MSB| 0X03
BYTE 4| User byte 1| OXFF
BYTE 5| User byte 2| OXFF
BYTE 6| RESERVED| OXFF
BYTE 7| RESERVED| OXFF
BYTE 8| CRC| 0X29
CO2| Pressure
Hex value – 0x04B0| Hex value – 0x03E3
Decimal value ­ 1200| Decimal value – 995
 Real value -> 1200 ppm| Real value -> 995 hPa

The sub-family code is 0xC9

Recycling

Recycle all applicable material.
Do not dispose of regular household refuse.
TSM400-1-CP_R1.0
­ June 2022

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