AH500 Module Manual 2.1 Overview The specifications for analog-to-digital modules, the operation, and the programming are described in this chapter. AH04AD-5A, AH08AD-5A, AH08AD-5B, and AH08AD-5C are analog-to-digital modules. 2.1.1 Characteristics (1) A module is selected according to practical application. AH04AD-5A: There are four channels. Inputs received by a channel can be either voltages or currents. AH08AD-5A: There are eight channels. Inputs received by a channel can be either voltages or currents. AH08AD-5B: There are eight channels. Inputs received by these channels are voltages. AH08AD-5C: There are eight channels. Inputs received by these channels are currents.
(2) High-speed conversion An analog signal is converted into a digital signal at a speed of 150 μs a channel. (3) High accuracy Conversion accuracy: The error is ±0.1% of an input voltage, and ±0.1% of an input current. (The ambient temperature is 25°C. The number of input voltages/currents which are averaged is 100.) (4) A scale range can be set by means of software. Users can set a scale range in ISPSoft. A scale range is a range of digital values to which a range of analog values corresponds. (5) 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.
2.2 Specifications and Functions 2.2.1 Specifications Electrical specifications 2-2 Module name AH04AD-5A AH08AD-5A AH08AD-5B AH08AD-5C Number of inputs 4 8 8 8 Analog-to-digital Voltage input/ Current input Voltage input/ Current input Voltage input Current input conversion Supply voltage 24 V DC (20.4 V DC~28.8 V DC) (-15%~+20%) Connector type Removable terminal block Conversion time 150 μs/channel An analog circuit is isolated from a digital circuit by a digital integrated circuit/an optocoupler, but the analog channels are not isolated from one another. 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