The Altronic DSM-4689DUS setpoint monitor is a universal microprocessor-based instrument designed to monitor critical process variables represented by an analogue voltage signal. Typical uses are measurement of pressures, temperatures and speed. In addition, an additional input is provided for connection to a negative ground C.D. ignition system for the tachometer, overspeed and hour meter functions. The device can be powered from any 12- or 24-volt source capable of supplying 10 watts. Modbus RTU communications is standard. The DSM-4689DUS has two individual setpoints (high and low) per channel. One solid state form C output switch is provided for connection to the machine protection system. Fault information in order of occurrence is available on the display and via the serial port. The front panel sealed membrane keypad provides easy selection and adjustment of the units, range, setpoints and other configuration data. The DSM- 4689DUS is housed in a gasketed, anodized aluminium case making it ideal for oilfield and other demanding-environment applications.