Chapter 6 Temperature Measurement Module AH04TC/AH08TC AH-08TC-5A: There are eight channels. Inputs received by a channel are temperatures. (3) High-speed conversion A temperature is converted into a digital signal at a speed of 200 μs a channel. (4) High accuracy Conversion accuracy: The error is ±0.5% of an input. (The ambient temperature is 25±5°C.) (5) Disconnection detection When a sensor is disconnected, the module gives an alarm or a warning. (6) PID control An object can be maintained at a desired temperature through a PID control action. (7) A module can be set by means of utility software. HWCONFIG is built-in utility software in ISPSoft.
Users can set modes and parameters in HWCONFIG to complete hardware configuration without spending time writing a program to set registers corresponding to functions. 6.2 Specifications and Functions 6.2.1 Specifications Electrical specifications Functional specifications 6-3 Module name AH04TC-5A AH08TC-5A Number of analog 4 8 inputs Type J, type K, type R, type S, type T, type E, and type N thermocouples ±150 mV voltage inputs Applicable sensor Supply voltage 24 V DC (20.4 V DC~28.8 V DC) (-15%~+20%) Connector type Removable terminal block 25°C/77°F: The error allowed is ±0.5% of full scale. -20~60°C/-4~140°F: The error allowed is ±1% of full scale.
Overall accuracy Conversion time 200 ms/channel An analog circuit is isolated from a digital circuit by a digital integrated circuit/an optocoupler, and the analog channels are isolated from one another by optocouplers. Isolation between a digital circuit and the ground: 500 V DC Isolation between an analog circuit and the ground: 500 V DC Isolation between an analog circuit and a digital circuit: 500 V DC Isolation between the 24 V DC and the ground: 500 V DC Isolation between analog channels: 120 V AC Isolation Analog-to-digital Centigrade (°C) Fahrenheit (°F) Voltage input conversion Type J: -100°C~1,150°C Type K: -100°C~1,350°C Type R: 0°C~1,750°C Type S: 0°C~1,750°C Type T:
-150°C~390°C Type E: -150°C~980°C Type N: -150°C~1,280°C Type J: -148°F~2,102°F Type K: -148°F~2,462°F Type R: 32°F~3,182°F Type S: 32°F~3,182°F Type T: -238°F~734°F Type E: -238°F~1,796°F Type N: -238°F~2,336°F ±150 mV Rated input range Average function Range: 1~100 Self-diagnosis Disconnection detection