DGH Corp., Manchester, NH, offers the D3000M series of Modbus-compatible digital-to-analog modules that let you control an analog output using a serial port. The modules combine a 12-bit DAC with programmable analog output control features and the ability to communicate using Modbus RTU over an RS-232 or RS-485 link. The series includes 16 models: 0–1 V, ±1 V, 0–5 , ±5 V, 0–10 V, ±10 VDC, 0–20 mA, and 4–20 mA with either RS-232 or RS-485 input. Output slopes are fully programmable from 0.01 V/s to 10,000 V/s and measurement resolution is 12 bits.
Modbus to Analog Modules from DGH