Current Sharing
Operation
22 Operating Manual for XDC Series Slave Power Supply
Operation
There can only be one master unit and 4 slave units curr ent sharing. All other units
will not current share. Units must have the same o utput ratings or they will not
current share.
Once a current sharing network is setup, yo u may adjust the voltage setpoint on the
master. The master will automatically adjust the s etpoints 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 t he output of all slaves.
When a slave’s output is disabled for any reason, the master wi ll disable the entire
current sharing network.
You may use local or remote (RS-232, GPIB, multichannel or analog) c ontrol to
operate the master.
Slaves will be operating under remote co ntrol from the master and in local lockout.
Hence, they will only respond to remo te queries.
The current limit setpoint on the master is stil l 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 digita l controlled front panel unit).
Power supplies may not enter calibratio n mode while current sharing, or enter
current share operation while in calibration mo de. 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).
Specifications
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