AS Series Module Manual
7- 4
7.2 Specifications and Functions
7.2.1 Specifications
Electrical specifications
Module Name AH04TC-A AH08TC-A
Number of Analog
Inputs
4 8
Applicable Sensor
Type J, type K, type R, type S, type T, type E, type N, and type B
thermocouples; ±100 mV voltage inputs
Supply Voltage
24 VDC (20.4–28.8 VDC) (-15% to +20%)
Connector Type
Removable terminal block
Overall Accuracy
25° C/77° F: The error range allowed is ±0.5% of full scale.
-20° C to +60° C/-4° F to +140° F: the error range allowed is ±1% of full scale.
Conversion Time
200 ms/channel
Isolation
An analog circuit is isolated from a digital circuit by a digital integrated circuit/
optocoupler, and the analog channels are isolated from one another by
optocouplers.
Isolation between a digital circuit and the ground: 500 VDC
Isolation between an analog circuit and the ground: 500 VDC
Isolation between an analog circuit and a digital circuit: 500 VDC
Isolation between the 24 VDC and the ground: 500 VDC
Isolation between analog channels: 120 VAC
Weight
115g 125g
Functional specifications
Analog-to-Digital
Conversion
Centigrade (°C) Fahrenheit (°F) Voltage Input
Rated Input Range
*1
Type J: -100° C to +1,200° C
Type K: -100° C to +1,350° C
Type R: 0° C to 1,750° C
Type S: 0° C to 1,750° C
Type T: -150° C to +400° C
Type E: -150° C to +980° C
Type N: -150° C to +1,300° C
Type B: 200° C to +1,800° C
Type J: -148° F to +2,192° F
Type K: -148° F to +2,462° F
Type R: 32° F to 3,182° F
Type S: 32° F to 3,182° F
Type T: -238° F to +734° F
Type E: -238° F to +1,796° F
Type N: -238° F to +2,372° F
Type B: 392°F to 3,272°F
±100 mV
Average Function
Range: 1-100
Self-Diagnosis
Disconnection detection
*1 If the measured temperature exceeds the upper limit, it only shows the maximum value. If the measured
temperature is below the lower limit, it only shows the minimum value.