TTI-D Temperature Signal Isolation Converter

The TTI-D series is a large-head, round-mount type temperature signal isolation converter that supports various thermocouples (K, J, E, T, R, S, B types) and platinum resistors (PT100 Ω) inputs. It features built-in input/output electrical isolation protection, software-configurable output temperature range, and a standard 4–20 mA two-wire loopback power output design, making it an ideal solution for process automation systems, sensor signal integration, and remote monitoring.

Product Introduction

The TTI-D features a large round head mounting design, making it suitable for direct installation on temperature sensors or sensor heads, facilitating on-site deployment and replacement.
The input supports thermocouples and Pt100 Ω platinum resistors, and the desired output temperature range can be set through dedicated software. This flexibility allows it to meet different process requirements.
The output is a two-wire 4-20 mA loop power supply design with built-in full electrical isolation to ensure stable signal unaffected by noise interference. Suitable for equipment temperature monitoring, process signal integration, automation control, or remote data transmission.

Functional Specifications (set by computer software)

Input Type	Measurement Range	Minimum Measurement Range	Conversion Precision (take the larger value)
Resistance Temperature Detectors (RTD)	PT100，-200.0-850.0°C	50°C	±1% of the measurement range or ±2°C
Resistance Temperature Detectors (RTD)	Cu50，-50.0-150.0°C	50°C	±1% of the measurement range or ±2°C
Thermocouple (TC)	B TYPE，400-1800.0°C	500°C	±1% of the measurement range or ±2°C
Thermocouple (TC)	E TYPE，-100-1000°C	50°C	±1% of the measurement range or ±2°C
J TYPE，-100-1200°C	50°C	±1% of the measurement range or ±2°C
K TYPE，-180-1372°C	50°C	±1% of the measurement range or ±2°C
N TYPE，-180-1300°C	50°C	±1% of the measurement range or ±2°C
R TYPE，-50-1768°C	500°C	±1% of the measurement range or ±2°C
S TYPE，-50-1768°C	500°C	±1% of the measurement range or ±2°C
T TYPE，-200-400°C	50°C	±1% of the measurement range or ±2°C

※ Cold contact compensation: -20-60°C

Illustrate:

The above accuracy data were obtained under ambient temperature conditions of 20°C ± 2°C.
The output accuracy "%" is relative to the set range.
When measuring with thermocouples, cold junction compensation error also needs to be added. The internal cold junction compensation error is ≤±1°C.

Output

Output	Accuracy	Load Resistor
4-20 mA	≤ ±0.1-0.2% of FS	RL≤(Ue-10)/0.021

Upper and lower limit overflow alarm output current: IH = 21 mA, IL = 3.8 mA

Reaction time: 90% of the final value is reached in 1 second.

Output ripple: ≤ ±0.1% of FS

Sensor open-circuit protection: can be set via software to either increase to 20.1 mA or decrease to 3.8 mA

TTI - Output Type - Input Type - Temperature Range

CODE	Output Type
D	4-20mA (Two-wire)

RTD PT100Ω	Cu50	Thermocouple									CODE	Temperature Range
P	Cu	B	E	I	J	K	N	R	S	T	CODE	Temperature Range
●	●		●	●		●	●			●	A	-50~100°C
●	●		●	●		●	●			●	B	-50~150°C
●	●		●	●		●	●			●	C	0~50°C
●	●		●	●		●	●			●	D	0~100°C
●			●	●		●	●			●	E	0~200°C
●			●	●		●	●			●	F	0~400°C
●			●	●		●	●	●	●		G	0~500°C
●			●	●		●	●				H	0~600°C
●			●	●		●	●				I	0~800°C
			●	●		●	●	●	●		J	0~1000°C
					●	●	●				K	0~1200°C
						●	●				L	0~1300°C
●										●	M	-200~200°C
●	●		●	●		●	●			●	N	-100~100°C
		●									SB	400~1800°C
								●	●		SRS	-50~1768°C