Ametek Sorensen XEL Serie Mode D'emploi page 23

Parallel Operation in Master-Slave Configuration
Parallel operation in Master-Slave configuration permits higher output currents to be realized with
equal current sharing between units and control of both voltage and current from a single unit. All
units should be of the same type, i.e. same rated output voltage and current. The diagram shows
3 units connected in parallel. For equal current sharing each unit must be independently
connected to the load with pairs of wires of equal gauge and length to ensure equal voltage
drops. Connect the V
CC switches to Remote) as shown.
Note: Do not make connections to the COM inputs of the slaves because these are already
linked to the master via the positive output connections.
The voltage and current of the master can be set by either the front panel controls via the digital
interface, or by an external voltage applied to its own CV and CC analog control inputs.
In constant voltage mode the voltage across the load is that set on the master unit by its front
panel controls, via the digital interface or by the analog CV remote control input. The current limit
for the system (i.e. the current in constant current mode) is the current limit set on the master x n,
where n is the total number of units connected in parallel.
Note: Because the analog remote control inputs are not isolated (COM is connected to the
positive output terminal) it is not possible to use analog remote control with instruments
connected in series.
Remote Off
A switch closure or logic low between the rear panel Rem Off and COM inputs will remotely turn
off the output if it was previously on; the front panel OUTPUT lamp will also go off. Opening the
switch between Rem Off and COM will turn the output on again.
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and I of the master to the CV and CC inputs of the slaves (set CV and
out out
Parallel Operation in Master-Slave Configuration
Notes:
1. Units can be wired for CV (constant
voltage, CC (constant current) or both (both
shown). Set CV and/or CC switches of
slaves to Remote.
2. Connect outputs in parallel using equal
length wires to the load.
3. If remote sensing is required use only
remote sense from the master to the load.
4. For constant current operation set the
required voltage overhead on the master.