Chapter 6 Temperature Measurement Module AH04TC/AH08TC
6-3
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
inputs
4 8
Applicable sensor
Type J, type K, type R, type S, type T, type E, and type N thermocouples
±150 mV voltage inputs
24 V DC (20.4 V DC~28.8 V DC) (-15%~+20%)
Removable terminal block
Overall accuracy
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.
Isolation
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
Functional specifications
conversion
Centigrade (°C) Fahrenheit (°F) Voltage input
Rated input range
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