Technical Specifications

Model	SRL3284
Technical Specifications
Number of input points	4
Input Type	Thermocouple
Supply polarity protection	Support
Operating voltage	24VDC (allowable voltage range: 18VDC~28VDC)
Bus 5VDC current consumption	165mA
Input range	Thermocouple type (any one): S/T/R/E/N/K/J; Voltage range: ±80mV
Principle of Measurement	Sigma -Delta
Resolution
Temperature	0.1°C/0.1°F
Voltage	15 bits + sign bit
Common mode rejection	85dB, DC-50HZ/60HZ/400HZ
Length of conductor	Maximum length of compensating conductor is 30m
Loop resistance of conductor	Max. 20Ω
Input impedance	≥10MΩ
Essential Error	≤0.1%FS
Consistency	0.05%FS
Cold junction error	±1.5°C
Isolate
Between Channel and Bus	Yes
Between the power supply and the bus	Yes
Between the channel and the power supply	Yes
Display indication	Power, RUN green indicator
Operating Conditions
Operating temperature	Operating environmental conditions: -20~60°C, relative humidity: 5%~90% (no condensation)
Dimensions (L×W×H)	15×100×80 (mm)

Model	SRL3274
Technical Specifications
Number of input points	4
Input Type	RTD
Supply polarity protection	Support
Operating voltage	30V DC
Bus 5VDC current consumption	165mA
Input range	Type of RTD (optional): Pt-100Ω, 1000Ω (α=3850PPM, 3920PPM, 3850.55PPM, 3916PPM, 3902PM); Ni-100Ω, 1000Ω (α=6720PPM, 6178PPM);
Principle of Measurement	Sigma -Delta
Data word	-32768 to +32767
Resolution
Temperature	0.1°C/0.1°F
Voltage	---
Resistance	15 bits + sign bit
Measurement transition time	less than 400ms
Common mode rejection	greater than 125dB, AC120V
Cable length (compensating conductor)	Max. 30m
loop resistance of conductor	max. 100Ω
Input impedance	≥1MΩ
Essential Error	≤0.1%FS
Consistency	0.05%FS
Cold junction error	---
Isolate
Between Channel and Bus	Yes
Between the power supply and the bus	Yes
Between the channel and the power supply	Yes
Display indication	Power supply green LED display
Operating Conditions
Operating temperature	Operating environmental conditions: -20~60°C, relative humidity: 5%~90% (no condensation)
Dimensions (L×W×H)	15×100×80 (mm)

Last modified: 2025-06-30