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Current Sharing
Operation
22 Operating Manual for XDC Series Slave Power Supply
Operation
There can only be one master unit and 4 slave units current sharing. All other units
will not current share. Units must have the same output ratings or they will not
current share.
Once a current sharing network is setup, you may adjust the voltage setpoint on the
master. The master will automatically adjust the setpoints of the slave units to
equalize the current output of all units. You may also disable or enable the output of
the master, automatically disabling or enabling the output of all slaves.
When a slave’s output is disabled for any reason, the master will disable the entire
current sharing network.
You may use local or remote (RS-232, GPIB, multichannel or analog) control to
operate the master.
Slaves will be operating under remote control from the master and in local lockout.
Hence, they will only respond to remote queries.
The current limit setpoint on the master is still the current limit for a single unit, not
the current limit for the entire current sharing network. Please see the operating
manual shipped with your master unit (full digital controlled front panel unit).
Power supplies may not enter calibration mode while current sharing, or enter
current share operation while in calibration mode. To enter calibration mode, turn off
all other units on the CANbus network.
Errors A master or slave will be disabled from current sharing (set to "No share") if:
• there is more than one master connected to the CANbus, (Error +1811)
• there are more than 4 slaves, (Error +1822), or
• the model does not match that of the master’s, (Error +1822).
Sp ecifications
Max units on bus 49
Max current share units 5
Max cable length 40m
Bus speed 700 kbits/sec.
Termination 120 ohm, 1/4 Watt
Connections parallel male DB9 to female DB9 cable
TM-XDSL-01XN.book Page 22 Tuesday, November 5, 2002 3:22 PM