Sensors of environmental conditions, security, fire loop and the state of digital devices as part of the SNMP system of remote monitoring
Sensors and detectors are part of the SNMP remote monitoring and control system consisting of TTA-08 controllers and EMS/NMS TTA Monitor. Sensors and detectors provide conversion of environmental parameters or various physical states into electrical signals. These signals are processed by the SNMP controller of the TTA-08 Ethernet network remote monitoring system.
The TTA-08-GSM device version supports the ability to remotely monitor the states of sensors and detectors in the GSM network.
Below are brief descriptions of sensors and detectors that we recommend for use with the TTA-08 device.
1-Wire temperature sensor based on DS18B20
The digital thermometer based on the DS18B20 in a protected housing (metal sleeve) is the most affordable sensor and provides temperature measurements in °C.
The DS18B20 digital temperature sensor communicates via a 1-Wire bus, requiring only one data line (and ground) to communicate with the CPU TTA-08. Additionally, the DS18B20 can be powered directly from the data line (parasitic power), eliminating the need for an external power supply.
Each thermometer DS18B20 has a unique 64-bit serial code, allowing multiple DS18B20s to operate on the same 1-Wire bus.
The sensor can be used to monitor ambient temperature, temperature monitoring systems inside buildings and equipment, monitoring and process control systems.
Appearance of temperature sensor DS18B20 (1-Wire)
Technical Specifications
- Operating supply voltage: 3V – 5.5V DC
- Temperature measurement accuracy: ±0.5°C in the range from -10°C to +85°C
- Operating temperature range: -55 to 125°C
- Interface: 1-Wire
- Unique 64-bit ID for each sensor
- Several sensors can operate on the same bus
- Stainless steel protection sleeve: (Diameter 6mm, length 35mm)
- Cable: (Diameter 4mm, length 1m, 2m)
- Purpose of conductors: Red – VCC, Black – GND, Yellow – DATA
The sensor operates in temperatures up to 125°C, but is not recommended for use above 100°C as the cable has a PVC sheath which may not withstand extreme temperatures.
The temperature sensor is supplied with a two meter long cable for direct connection to the screw terminals of the TTA-08 controller.
Digital humidity and temperature sensor based on DHT22
The DHT22 (AM2302) Digital Output Relative Humidity Temperature Sensor outputs a calibrated digital signal. The sensor uses exclusive digital signal acquisition technology and humidity detection technology to ensure reliability and stability. Each sensor of this model has temperature compensation and a calibration coefficient stored in memory.
Small size, low power consumption and long transmission distance (20m) allow the DHT22 to be used in any harsh application environment.
The DHT22 relative humidity and temperature sensor has a compact housing with four contacts, which makes connection convenient.
Appearance of the relative humidity and temperature sensor DHT22 (AM3202)
Technical Specifications
- Operating supply voltage: 3.3V to 5.5V DC
- Measuring temperature range: -40°C to 80°C
- Temperature measurement accuracy: ±0.5°C
- Temperature step: 0.1°C
- Measuring humidity range: 0% RH to 99.9% RH
- Humidity measurement accuracy: ±2%RH (at 25°C)
- Humidity measurement step: 0.1%
- Polling period: 2s
- Purpose of conductors: Red – VCC, Black – GND, Yellow – DATA
The relative humidity and temperature sensor is supplied with a two meter long cable for direct connection to the screw terminals of the TTA-08 device.
220V AC network presence detector
The 220V AC voltage detector is a specialized device for monitoring the condition of a household electrical network. The detector is designed to work as part of the device for monitoring the condition of loops and sensors TTA-08.
This Detector is a simple and reliable high-quality device for monitoring the presence of 220V alternating voltage, developed by Terratel specialists.
The 220V voltage detector allows you to promptly inform about malfunctions, and in conditions of industrial use in factories and enterprises, avoid the consequences of possible emergency situations.
The 220V network presence detector is implemented in the form of a printed circuit board with a high-quality terminal block and has a simple circuit diagram.
Appearance of the 220V AC presence detector
Installation and connection of the detector to the TTA-08 device does not require special skills and tools. For reliable contact, the 220V voltage sensor provides for fixing the cable ends on the terminal block. The detector is connected to the 220V network with a plug.
The detector has an internal galvanic solution, which makes it impossible for the input voltage to influence the TTA-08 device.
The TTA-08 controller supports the connection of two detector for the presence of voltage from the 220V electrical network (for example, at the input and output of the UPS uninterruptible power supply).
Technical Specifications
- Type: AC voltage presence detector
- Input signal (operating voltage limits): 100V -265V AC
- Material: textolite
- Maximum cable length: 20 m
- Dimensions (without plug): 10 x 50 x 10 mm
- Weight: 50 g
The 220V AC network presence detector is intended for connection only to the TTA-08 device manufactured by TERRATEL.
Flood sensor with LED Octopus
The flood sensor with LED Octopus is designed to detect flooding in a room and transmit a signal to a security device.
The sensor has a built-in low-current relay, so it can be used to directly control small loads (LEDs, relays, detectors, etc.).
They are used both in security systems for comprehensive security of property, and in automatic systems for emergency shutdown of water supply, in facilities such as boiler rooms, boiler rooms, as well as in warehouses, country houses, cottages and usually bathrooms.
Appearance of a flood sensor with an Octopus LED
Technical Specifications
- Rated DC supply voltage: 12V
- DC supply voltage range: 5V 30V DC
- Relay contacts normally closed: NC
- Degree of protection: IP 68
- Ready to work time: 1 sec
- Overall dimensions: 13x13x64 mm
- Weight: 65 g
Placement and installation
When installing the Octopus sensor in an area of possible flooding, remove the protective layer from the adhesive tape and secure the sensor, pressing the housing tightly to the installation site. If fastening with tape is not secure, secure additionally with two screws included in the kit.
Connect the power according to the polarity, plus – Red, minus – Black, connect the relay contacts – Yellow and Blue.
Fire smoke detector SPD-3.10
The detector is a structure consisting of the detector itself and the base. The plastic housing of the detector houses the optical system, electronic signal processing unit and status indication control.
The detector is designed to detect flashes in enclosed spaces of buildings and structures. The detector reacts to the appearance of low concentration smoke, indicates this condition and transmits the “FIRE” signal to the TTA-08.
Additionally, the detector has the functions of indicating standby mode and checking functionality.
The detector has the functions of indicating the standby mode and checking its functionality.
External view of the fire smoke detector SPD-3.10
Technical Specifications
- Sensitivity: 0.05-0.2 dB/m
- Inertia, no more than: 10 s
- Power supply voltage: 10-30 V DC
- Current consumption in standby mode, no more than: 0.1 mA
- Internal resistance in “FIRE” mode at a current of 20 mA, no more than: 500 Ohm
- Current consumption in “FIRE” mode: 8-30 mA
- FIRE mode reset time, not less than: 5 s
- Technical readiness time, no more: 30 s
- Operating temperature range: -10°C…+55 °C
- Overall dimensions: Ø85×37 mm
- Weight: 0.15 kg
Connection to fire loop TTA-08
The operating principle of the detector is based on monitoring the optical density of the environment in a protected area.
The detector with a 4-wire fire smoke loop is connected to the TTA-08 using the B2 base.
The fire smoke detector provides recognition of the states “Normal”, “Fire”, “No detector”.
Cascade temperature sensor KDT
The cascade temperature sensor is an electronic module with two RJ-45 connectors, housed in a polymer shell. This sensor is a reliable device for a multipoint temperature measurement system, developed by Terratel specialists.
Temperature measurement sensors are connected in series and, using a power matching module (MM), are connected to the controller of the TTA-08 monitoring system.
Temperature measurement sensors are connected using standard patch cords or UTP cross-patch cords, cat. 5/5e. The length of the patch cord can be from 0.5 m to hundreds of meters.
There are two ways to obtain current temperature values from sensors:
- Via WEB interface
- When connecting to a monitoring system based on the SNMP protocol
The multipoint temperature measurement system allows you to enter the required values for the upper and lower limits of permissible temperatures for each of the connected sensors with the ability to issue an SNMP trap message when thresholds are crossed.
External appearance of the CDT cascade temperature sensor
Technical Specifications
- Operating range of measured temperatures: from -40°C to 120°C;
- Permissible limits of absolute error:
- ± 0.5°C typical accuracy at 25°C
- ±1.0°C between 0°C and 70°C
- ±1.5°C in the range from -40°C to 120°C
- Supply voltage: +12V to +15V DC
- Interface: RS-485 based
- Unique 64-bit ID for each sensor
- Polling period: 750ms
- Overall dimensions of the cascade temperature sensor: 80x35x15 mm
- Weight: 20 g
Humidity and temperature sensor with RS485 MODBUS RTU interface (SHT20)
The SHT20 digital relative humidity and temperature sensor uses RS485 communication interface technology and supports MODBUS RTU industrial protocol to monitor environmental parameters.
This sensor is designed for DIN rail or wall mounting, making it the preferred choice for monitoring temperature and humidity in server rooms, laboratories, data centers, shopping malls, etc.
The RS485 interface provides communication over distances of up to 1000 meters, and support for the MODBUS RTU protocol allows you to implement a multi-point system for monitoring temperature and humidity values in real time when using the TTA-08 controller. This system allows you to organize monitoring of environmental parameter values from 1 to 247 points.
Appearance of humidity and temperature sensor RS485 MODBUS RTU
Technical Specifications
- Power supply range: 9V – 40V DC
- Power: less than 0.1W
- Temperature measurement range: -40°C – 85°C
- Humidity measurement range: 0 – 100% relative humidity
- Temperature measurement accuracy: +/- 0.3 °C
- Humidity measurement accuracy: +/- 3.0% RH
- Response time: 2s
- Communication output interface: RS485(communication range up to 1000 meters)
- Possibility to select the data transfer speed setting
- Communication protocol: MODBUS RTU
- DIN rail mounting
- Overall dimensions: 65 * 45 * 29 mm
- Weight: 40 g
Construction of a multipoint temperature and humidity measurement system
Using a sensor with RS485 MODBUS RTU interface is a cost-effective and reliable solution for monitoring temperature and humidity values in real time in different places with one device (multipoint temperature and humidity measurement system). By design, sensors with an RS-485 interface are suitable for industrial environments and also support relatively long communication distances (up to 1000 m).
Installation and connection to the RS485 interface TTA-08
The design of the humidity and temperature sensor with RS485 MODBUS RTU interface is equipped with a standard mount for mounting on a DIN rail or flat surface.
The RS485 communication output interface of the humidity and temperature sensor is connected via terminal blocks to the RS485 interface of the TTA-08 device.
Carbon monoxide monitoring sensor with RS485 MODBUS RTU interface
The digital carbon monoxide sensor uses RS485 communication interface technology and supports MODBUS RTU industrial protocol to monitor environmental parameters.
The high-precision digital carbon monoxide sensor, supporting RS485 communication interface and industrial MODBUS RTU protocol, is a practical, high-sensitivity integrated sensor for online gas monitoring.
The RS485 interface provides communication over distances of up to 1000 meters, and support for the MODBUS RTU protocol allows you to implement a multi-point system for monitoring the presence of carbon monoxide in real time based on the TTA-08 controller. This system allows you to organize monitoring of environmental parameter values from 1 to 247 points.
Appearance of a carbon monoxide sensor with RS485 MODBUS RTU interface
Installation and connection to TTA-08
The carbon monoxide sensor design with RS485 MODBUS RTU interface is equipped with a standard mount for DIN rail or flat surface mounting.
The RS485 communication output interface of the carbon monoxide sensor is connected to the RS485 interface of the TTA-08 device using a terminal block.