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Table of Contents
AD Input Module: MD-HADIN4
Specification
| Item | Description |
|---|---|
| Operating Temperature | -10 ~ 50 (no condensation) |
| Operating Humidity | 35 ~ 85%RH |
| Input Resistance | 20K ohms |
| Input Voltage Range | 1~5V mode: 0.5 ~ 5.5V (Single-ended) 0~10V mode: -0.5 ~ 10.5V (Single-ended) |
| Output Value | 0 ~ 100,000 |
| Resolution | 16.6-bit |
| Precision | ±0.1% |
| Conversion Speed | 240ms per channel |
| Communication Method | RS485 |
| Packet Transmission | 3ms |
| Isolation Method | No Isolation |
Important: The AD Input Modules' inputs are not isolated, so please be sure to not provide voltage or current in excess of the specified ranges. Doing so could cause permanent damage.
The MD-HADIN4's sampling frequency is 240ms per channel, so sampling all 4 channels will take approximately 960ms. Therefore, it is unnecessary read more than once every 960ms, as it too will always return the same value.
When the system is first powered on, all four channels are scanned once. Reading at this time will return an invalid value. Please allow at least 960ms from the time the system is powered on before reading and data.
The MD-HADIN4 has the benefit of a higher resolution than the MD-ADIN4, but takes longer to do the conversion. Therefore, the MD-HADIN4 may not be suitable for high frequency signals.
Module ID (Modbus Slave Address) Assignment
On the front of the module, there is a rotary switch labeled ID, that is used to select the Modbus slave address for the module. When installing multiple modules of the same type, the ID for each module should be unique.
Rotary switch position 0 corresponds to Modbus slave address 10. If the ID is changed after the module is powered on, it must be power cycled for the new ID to take effect.