© National Instruments | 3-23RMX Programmable Power Supplies User ManualExternal Monitoring of the Operation StatusThe J2 connector has status outputs that can be used to externally monitor the operation statusof the RMX programmable power supply. The following five items make up the status outputs.The outputs are open collector outputs of photocouplers; they are isolated from the internalcircuits of the RMX programmable power supply. The status common is floating (that is, it hasan isolation voltage of less than or equal to 60 V).The above signal output circuit is protected with reinforced insulation from the MAINS.The maximum ratings of the signal terminals are as follows:• Maximum voltage: 30 V.• Maximum current (sink): 8 mA.Table 3-4. External Monitoring of the J2 Connector Signal Terminals Operation StatusPin Signal Description Circuit6-9 STATUS COM This is the status output common.This is the photocoupler emitter output.1 CV STATUS This is set to low level when the RMXprogrammable power supply is in constantvoltage mode.This is the photocoupler open collectoroutput.2 CC STATUS This is set to low level when the RMXprogrammable power supply is in constantcurrent mode.This is the photocoupler open collectoroutput.3 ALM STATUS This is set to low level when a protectionfunction (OVP/OVP2/ OCP/ OHP/ OHP2/FAN/ SEN/ AC-FAIL/ SD) is activated.This is the photocoupler open collectoroutput.4 PWR ON STATUS This is set to low level when the RMXprogrammable power supply is turned on(PWR ON STATUS).This is the photocoupler open collectoroutput.5 OUT ON STATUS This is set to low level when the output isturned on. This is the photocoupler opencollector output1123456 to 9
