About Microcyber
Microcyber Corporation is a high-tech enterprise founded by the Shenyang Institute of Automation, Chinese Academy of Sciences, engaged in the development, production, and application of networked control systems, industrial communication, and instrumentation. The company has undertaken national science and technology programs including the National Science and Technology Major Project and the 863 Program, and is the construction unit for the National Engineering Research Center for Networked Control Systems.
Microcyber developed the first internationally certified fieldbus protocol master stack and the first nationally certified fieldbus instrument, and co-developed China’s first industrial Ethernet protocol standard (EPA) and first industrial wireless communication standard (WIA-PA), both of which became IEC international standards. The company’s products and technologies have won two National Science and Technology Progress Awards and a National Science and Technology Invention Award, and have been exported to markets worldwide across more than 200 large-scale automation projects. Microcyber holds ISO 9001 and IATF 16949 (automotive) quality system certifications, and is a member of FieldComm Group and PROFIBUS & PROFINET International (PNO).
Product Overview
The NCS-TT305 series HART temperature transmitter is a high-precision, low-drift, high-reliability field device for process control. It integrates a broad set of functional modules, supporting both general temperature detection and more complex control strategies.
The transmitter uses digital signal processing, is compatible with a wide range of RTD and thermocouple sensors, and covers a wide measuring range. Its simple field-to-control-room interface helps reduce installation, commissioning, and maintenance costs.
The NCS-TT305 series supports 4-20mA + HART output with local LCD display, and is used across the petroleum, chemical, power, and metallurgy industries.
Key Specifications
| Parameter | Specification |
|---|---|
| Bus Interface | 4-20mA + HART 7 (supports Burst mode) |
| Protocol Version | HART 7 |
| Bus Power Supply | Non-Ex: (13-45)VDC; Ex d: (13-45)VDC; Ex ia: (13-30)VDC |
| Wiring Method | 2/3/4-wire |
| Input Signal | Resistance: 0-500Ω, 0-2000Ω, 0-4000Ω, 0-40000Ω; RTD: Cu50, Cu50_GOST, Cu100, Cu100_GOST, Pt50_GOST, Callendar_Van_Dusen(Pt100), Pt100, Pt100_GOST, Pt200, Pt500, Pt1000, Ni50, Ni100, Ni120, Ni1000; mV: -100mV to 100mV; Thermocouple: B, E, J, K, N, R, S, T, L_GOST, A(W5ReW20Re), C(W5ReW26Re), D(W3ReW25Re), NiCrAuFe, CuAuFe |
| Number of Channels | Dual channel |
| Current Accuracy | 0.05%; current temperature drift 0.005%/°C |
| Electrical Isolation | 2kVAC/50VAC |
| Voltage Effect | ±0.005%/V |
| Response Time | 1.0s-1.65s, depending on sensor type and wiring method |
| Start-up Time | ≤10s |
| Damping Adjustment | Time constant 0-32s |
| EMC | IEC 61326 |
| Ex Certification | IECEx: Ex ia IIC T6…T4 Ga; ATEX: II2G Ex db IIC T6…T4 Gb, II2D Ex tb IIIC T85°C…T110°C Db |
| LCD Display | Supported |
| Button Operation | Supported for local parameter setting |
| Operating Temperature | (-40 to 85)°C; (-55 to 85)°C optional |
| Humidity Range | (5-95)%RH |
| Storage Temperature | -50 to 85°C |
| Vibration Resistance | 2-25Hz: ±1.6mm; 25-100Hz: ±4g |
| Protection Rating | IP67 (IP20 confirmed; IP67 certification in progress) |
| Dimensions | 139.7 × 111.9 × 112.0 mm |
| Housing Material | Aluminum, polycarbonate |
| Weight | Approximately 1.67 kg |
Certifications and Approvals
Intrinsically Safe: Ex ia IIC T6…T4 Ga
- Ia: highest safety rating, suitable for Zone 0 (Ga)
- IIC: highest gas hazard group, covering gases such as hydrogen, acetylene, and carbon disulfide
- T6…T4: maximum surface temperature under 85°C (T6), 100°C (T5), or 135°C (T4)
- Reference standards: IEC 60079-0:2017, IEC 60079-11:2023
Explosion-proof (Flameproof): II2G Ex db IIC T6…T4 Gb; II2D Ex tb IIIC T85°C…T110°C Db
- Reference standards: EN IEC 60079-0:2018+A11:2024, EN 60079-1:2014+A11:2024
Functional Safety: The NCS-TT305 series is assessed for functional safety per IEC 61508. Full safety data, including SIL ratings by architecture, is available in the NCS-TT305H Series Intelligent Temperature Transmitter Functional Safety Manual.
