Wittelb WIN-IO-4AOMV 4-Port Analog Output Voltage to Modbus RS485 Converter

Connect the 24V AC/DC power supply to the designated V+ and V- terminals using the 5.08mm screw terminals. For RS485, wire the A and B lines from your Modbus network to the corresponding terminals, ensuring correct polarity for network integrity. The module includes reverse polarity protection via resettable fuses to prevent damage from wiring errors.

The module typically uses fixed Modbus RTU settings (baud rate, parity, stop bits) as per its datasheet, often configurable via DIP switches or internal registers. Consult the manufacturer's documentation to set the unique slave ID (1-247) and match the baud rate (e.g., 9600, 19200) with your Modbus master. Communication is established by writing to the module's holding registers corresponding to each output channel.

The converter provides 12-bit resolution, meaning it can output 4096 discrete steps across the 0-10V range. Each step corresponds to approximately 2.44mV. You control the voltage by writing a value (0-4095) to the module's designated Modbus holding register for each channel, which the internal DAC converts into the precise analog voltage on the output terminals.

Yes, it is designed for industrial use. The closed enclosure provides basic protection, and the RS485 interface offers good noise immunity for long-distance communication. For optimal performance in electrically noisy environments, use shielded twisted-pair cable for the RS485 network and ensure proper grounding. The operating temperature range of 0-60°C suits most control panel applications.