Remote Temperature Measurement Unit ConTrace AS-xxx-Ex

Features

  • Connection of 8 temperature sensors
  • Up to 16 blocks can be daisy chained together
  • Up to 128 temperature sensors when scaling the
Product Datasheet

Application Areas

Operation in hazardous zones 1, 2 (21, 22)

Approvals

The remote temperature measurement unit ConTrace AS-xxx-Ex is one of the components of the specialized control system for electrical heating ConTrace. Transmission of temperatures data is carried out via RS-485 (Modbus RTU). This makes possible to use the ConTrace AS-xxx-EX units as a part of third-party control systems that support this type of communication.

Using ConTrace AS-xxx-Ex units allows for centralized control and transmission values of the temperatures of remote objects, which is particularly effective for a large gathering of measurement points within a radius of 100 m. For each ConTrace AS-xxx-Ex unit, depending on the modification, up to 8 RTD temperature sensors can be connected. Incoming data from sensors are transferred to the control cabinet by means of only one cable according to the RS-485 standard. At a distance of 1 200 m, up to 16 ConTrace AS-xxx-Ex units can be connected in series. This makes it possible to monitor changes in the temperature characteristics of the electrical heating system at 128 points simultaneously.

The intrinsically safe circuit and hazardous area enclosure allow the installation of the remote temperature measurement unit ConTrace AS-xxx-Ex in zones 1 and 2 (21, 22).

  • Connection of 8 temperature sensors
  • Up to 16 blocks can be daisy chained together
  • Up to 128 temperature sensors when scaling the
  • The maximum distance of the unit from the control cabinet to 1 200 m
  • Various modifications
Technical Data
Ex marking 1 Ex e ia m IIC T6
Supply voltage 90...245 VAC, 50...60 Hz
Power consumption, max 5 W
Interface RS-485
Communication protocol Modbus RTU
RS-485 interface connection A, B, com
RS-485 communication speed 9 600 ...115 200 bps.
Max length of the RS-485 network segment 1200 m*
Terminal blocks for connections
1. Temperature Sensors
2. Interface cable
Up to 2,5 mm2
Terminal blocks for mains power connections Up to 6 mm2
Number of temperature measurement channels 8
The resolution of the ADC of the measuring channel 23 bits
Type of sensors See the table “Types of sensors”
Temperature measurement range −100 ... +500 °С
Accuracy of measurements 0,5 °С
Maximum sensor distance from the unit 100 m
Sensor connection circuit Three-wire circuit
Operating temperature range −55 ... +50 °С
Degree of protection IP66
Dimensions (W×H×D), mm:
AS-8MM-Ex
AS-8PP-Ex
AS-8PM-Ex
AS-4PM-Ex
340×325×215
315×290×125
380×325×125
325×325×125
Weight, g:
AS-8MM-Ex
AS-8PP-Ex
AS-8PM-Ex
AS-4PM-Ex
8,0
4,5
6,0
4,5
Service life Not less than 10 years

* Depends on the selected data rate and the conditions for the protection of the control cable against electromagnetic interference.

  1. Cable glands
  2. Explosion proof enclosure
  3. Remote temperature measurement module
  4. Terminal blocks for mains connection
  5. Ground wire