TCA-AT Intrinsically safe thermocouple converter

Comprehensive parameter

Standard accuracy：Typical value: ±0.1% FS
Cold junction compensation error：±1℃（compensation range -15~+75 ℃）
Temperature drift：The typical value is 0.0015% of the maximum input or 0.6 μV（whichever is larger）
Powering or storage time drift：±2μA（180days）
Influence of load change：Maximum:±2μA
Influence between the channels：Maximum: 2 μA
Response time：<1ms
Stabilization time after power-on：<1s
Maximum Bearable Experimental voltage：For input-output-power supply: 2.5 kV AC（50 Hz, 1 min., test voltage）

TCA-AT intrinsically safe thermocouple converter is a temperature transmitter which converts field thermocouple millivolt resistance into standard current.

Category：

Safety Barrier

Keywords：

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Product Details

■ Overview

 TCA-AT intrinsically safe thermocouple converter is a temperature transmitter which converts field thermocouple millivolt resistance into standard current. Analog circuits are fully adopted. The simulated thermocouple temperature transmitter has the advantages of no resolution error or sample period error. It is possesses high reliability and no dead halt risk. Of all TCA serial products, if the simulated temperature transmitter is used to replace universal signal intrinsically safe isolator with a CPU, this series of products can be used to form a channel instrument system in full simulation nature. As relevant products of the control system employ a single CPU, it is hard to achieve functional safety. Therefore, the simulated temperature transmitter is used as functional safety alternative solution to achieve and enhance the reliability and safety of the system.

 The typical value accuracy is ±0.1% FS. Ex-factory index: ±0.15% FS; the circuit method of current positive feedback is adopted to achieve linearity correction. Calculation is completed by Yutong Series R System Control Software 1.1. The calculation accuracy is ±0.03% FS in general.

 Thermocouple graduation and ranges in common use are listed in the column of “model and model selection & ordering”. It is suggested that the ranges listed for shortening the supply time and reducing the cost be selected. As for special graduations and ranges excluded in the scope, the intelligent TCA-TP universal signal intrinsically safe isolator can be used instead. If the single range is large, further discussion is required.

 Cold junction compensation error: ≤ ±1 ℃.

 Output signals 4~20mA can be extended to 0~20 mA.

 Output self-adaptive load is 0~800 Ω. High limit of the output current is 25 mA. Load change error < ±2 μA/800 Ω. Impact of load open circuit on the other output < ±2 μA .

 The power supply range can be chosen from within range of 20~42VDC or 15~42VDC.

 See the “Technical Data Sheet” in the specifications for current consumption or other functional indices.

 There is no power light on the instrument panel. The power supply indicator is replaced by a model printed on the instrument panel. After the power is on, the model on the panel becomes illuminated by means of the LED backlight.

 Clamping type structure, a 35 mm DIN standard guide rail clamping type installation is used. Screw terminal, the wire is connected and fastened by M3 screws.

■ Model, model selection and ordering

Model selection example

Example 1. TCA-AT13-TA-V1 K，0~1000……1-input & 3-output，Intrinsically safe thermocouple converter（K, 0~1000℃ input, 4~20mA output , terminal power supply 20~42VDC）

Example 2. TCA-AT11-ZA-V2 W，0~2200…...1-input & 1-output，Intrinsically safe thermocouple converter（W, 0~2200℃ input, 4~20mA output , guide rail power supply 20~42VDC）

Note: if you select products with guide rail power supply, please order the special power supply DIN guide rail as well.

Optional accessories: Special power supply DIN guide rail (1 m/pc) PSDR-9000

■ Block diagram/wiring diagram