National Instruments RMX-4120 User Manual page 102

Chapter 4 Parallel/Series Operation
If the number of units during master-slave parallel operation that has been specified in the
CONFIG settings (CF01) does not match the actual number of units connected in parallel, the
correct current will not be displayed.
External Control
This is only available on the master unit.
External Monitoring
Caution
common cable of the master unit to the monitor common cables of the slave units.
If the cables connected to the load are disconnected, the common cables will be
damaged.
• External monitoring of the output voltage (V MON)—This can be monitored from the
master unit.
• External monitoring of the output current (I MON)—You can monitor the output current
of the master unit and each slave unit. Use the master unit to monitor the total output current.
• Status monitors—You can monitor the status of the following items from the master unit
and from each slave unit: constant-voltage mode (CV STATUS), constant-current mode
(CC STATUS), output on, POWER switch on, and alarms. However, slave units always
output the status of constant-current mode.
Remote Sensing
This is only available on the master unit.
Alarm
If an alarm is detected, the units behave as follows:
• Master Unit—If an alarm is detected on the master unit, output of each slave unit is turned
off, and then the output of the entire system is turned off.
• Slave Unit—The slave unit independently enters the alarm state and turns its output off.
The output does not turn off on the master and other slave units.
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Figure 4-1. Master Unit and Slave Unit
During master-slave parallel operation, do not connect the monitor
Lit