The component boards of the HMDW110 series transmitters have 2 output types: Modbus mode (RS-485) and analog mode (current output). The output type is selected when ordering the device. See the type label of the device to see the chosen output type.
The component boards have also a service port for configuration and calibration use.
- 1
- Terminal block for 4 ... 20 mA current loop output(s). Must be disconnected when the transmitter is powered through RS-485 connection in the lower terminal block (terminals 1 ... 4).
- 2
- Service port connector (4-pin M8)
- 3
- Terminal block for RS-485 output. For Modbus connection.
| You can pull out the terminal blocks from the component board for easier installation, and to disconnect the transmitter from power and RS-485 when using the service port. |
| Before using the transmitter in Modbus mode, always disconnect the terminal block for terminals 5 ... 8 to prevent the effects of ground loop on measurements. The RS-485 connector used for Modbus communication in the lower terminal block will power the transmitter. |