Lambda 303 Series, Operator'S Manual

Page: 42 / 56

OPERATING INSTRUCTIONS
6-20
0V
15V
ENABLE
0V
10V
V
ANALOG
0V
INHIBIT
15V
0V
15V
ENABLE
0V
10V
V
ANALOG
0V
INHIBIT
15V
Figure 6-3 Remote Interface waveforms for 303 operated with INHIBIT
6.3
Parallel Operation
The 203/303 series capacitor charging power supplies are constant current sources,
and can be connected in parallel for applications requiring increased power. To operate
more than one unit in parallel all that is required is a parallel control cable, and to con-
nect the HV output cables together at the load. Either model 203/303L or 203/303S or
any combination of units can be operated in parallel. If at least one model 203/303L is
connected in a parallel system then the system can be operated without an external
controller by using the 203/303L as a master supply in local mode.
If status, voltage, and current displays/measurements are required individually for each
supply in a parallel system then the ‘daisy chain’ control cable is not appropriate, and
each unit must be individually connected to a remote control system.
6.3.1 Parallel system comprising 203/303L supplies
If all of the parallel units are L model supplies then one unit should be operated as the
master supply in either local or remote mode. The other parallel supplies can be con-
nected to the SLAVE 25-pin D-sub connector on the master unit rear panel (refer to
Figure 6-4). The SLAVE control cable can be a pin-to-pin ribbon or other cable that is