Table of Contents
2-Channel Digital to Analog Current Output Module: MD-DAOUT2B
The MD-DAOUT2B is a 2-channel digital to analog current, 0~20mA / 4~20mA , output module. The current range is configured using the dipswitch on the side of the module
The MD-DAOUT2B’s negative terminal controls the current through a connected load; so it should not be connected to a fixed potential. The MD-DAOUT2B should be used to drive differential loads. To drive single-ended loads, an isolation circuit may be required.
Specification
| Item | Description |
|---|---|
| Channels | 2 |
| Operating Temperature | -10 ~ 50℃ (no condensation) |
| Operating Humidity | 35 ~ 85%RH |
| Input Resistance | 20KΩ |
| Analog Output | 0~20mA Or 4~20mA (600Ω or higher differential load) |
| Output Value | 0 ~ 60,000 |
| Conversion Speed | 30ms per channel |
| Communication Method | RS485 |
| Maximum Conversion Rate | 0 ~ 60,000, 600ms |
| Isolation Method | No Isolation |
Output Current
Values between 0 ~ 60,000 correspond linearly to the output current (4 ~ 20mA, dipswitch OFF / 0 ~ 20mA, dipswitch ON).
Modbus Starting Address
Each module has 2 channels, each with its own unique Modbus address.
| Channel | 0 | 1 |
|---|---|---|
| Starting Address(base 10) | 3400 | 3401 |
| Starting Address(base 16) | CE4 | CE5 |
| Address (base 10) used by HMI (SCADA) | 43401 | 43402 |
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.