Operations Overview 1-2B1272M001 BARNETT ENGINEERING LTD. ProTalk Cv2HARDWAREINPUTS8INPUTS8OUTPUTSPOINTSUP TO 30 INPUTS OR OUTPUTSGROUP1TELEPHONEPORTHARDWAREOUTPUTSGROUP6DIRECTORYADIRECTORYFDIALOUTCOMMANDSCONTROLCOMMANDSFigure 1 Cv2 Block DiagramAnalog inputs convert the voltage level to a digital value and perform a comparison againstthe programmed low and high setpoints. An alarm is present when the measured value isabove or below the setpoint. Alarm messages are spoken using the stored phrase with either“High” or Low” appended depending on which setpoint has been exceeded. The actualreading, including decimal place notation and engineering units, is spoken when the Cv2 isinterrogated.The latching alarm function is also available for analog inputs.1.3 How are alarms processed?The way in which the Cv2 processes alarms is shown in Figure 1.