KEPCO RA 19-4B - Manual (Page 20)

2-10
RA 19-4B 011409
2.4.2.2.2 PARALLEL CURRENT SHARE - EXTERNAL WIRING
Due to current share bus incompatibility between HSF 350W units and the 50W, 100W and
150W units, using external wiring for parallel current share is not necessary. Parallel current
share bus configuration must be accomplished using the DIP switches (see PAR. 2.4.2.2.1).
2.4.2.3 SENSE CONNECTIONS FOR PARALLEL CONFIGURATIONS
NOTE: HSF power supply sense lines MUST be connected to the respective output terminals;
otherwise the power supplies will not work.
For parallel configurations the sense lines must be connected in parallel. This can be accom-
plished either by using the DIP switches (positions 3 and 4 set to ON) or by setting the DIP
switch positions 3 and 4 to OFF and using external wires. When configuring units to work in par-
allel, the current share bus (PAR. 2.4.2.2) must also be configured.
For local sensing (at the rack adapter) connect the sense lines in parallel using either the DIP
switches or external jumpers, then connect one +S and one –S from the I/O mating connector to
the DC OUTPUT terminal block using short jumpers.
For remote sensing (at the load) connect the sense lines in parallel using either the DIP
switches or external jumpers to connect the sense lines in parallel, then connect one +S and
one –S from the I/O connector to the load using external wires.
For both local and remote sensing Positions 1 and 2 of each DIP switch in the parallel configura-
tion must be set to OFF (open); refer to Figure 2-1 to identify the DIP switch associated with a
corresponding slot.
See the following paragraphs for more details:
• PAR. 2.4.2.3.1: Parallel configurations using DIP switches to connect the sense lines in par-
allel and external wires to configure local sensing.
• PAR. 2.4.2.3.2: Parallel configurations using external wires to connect the sense lines in
parallel and external wires to configure local sensing.
• PAR. 2.4.2.3.3: Parallel configurations using DIP switches to connect the sense lines in par-
allel and external wires to configure remote sensing.
• PAR. 2.4.2.3.4: Parallel configurations using external wires to connect the sense lines in
parallel and external wires to configure remote sensing.