DC Power Technologies FS3 Version 3 - Technical Hardware Manual - Manual (Page 15)

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DC Output Connector
The DC output connector fitted to the FSx series is a high current
SB350 connector designed for low resistance connections.
FS3
A single SB350 connector mounted horizontally. Special
applications may require an SB175 connector fitted in place of the
SB350.
FS9L
Frame allows for two connectors to manage large output currents.
FS5, FS9H
A single DC output connector is fitted.
All models provide for fixing of the connecting battery cable by way
of the supplied threaded screws fastened through the cable
connector into the internal chassis.
Auxiliary Power Supply Unit (PSU)
The FSx series chargers contain a power supply unit to provide a
DC supply to the charger controller. A feed from this supply also
holds the charger modules in a default “standby” state, ready to
commence charging.
FS3
The auxiliary PSU is integrated into the backplane PCB and can be
configured at the AC filter board (UL models) or Input Terminal
block (Standard models) for 208VAC or 480VAC input voltages.
The FS3 PSU outputs a nominal 24VDC.
FS5, FS9
The auxiliary PSU is located on a dedicated PCB assembly
mounted on the side of the internal chassis frame above the
controller and bus bars.
The FS5-9 PSU provides a regulated 54VDC output from a 480VAC
supply.
Backplane
At the rear of the FSx housing is the backplane PCB providing
connectivity to the charger modules. The backplane features a
multi-pin connector in each supported module bay for connection
with an installed charger module. The connector passes AC from
the AC Loom and DC output into the backplane. The connectors
also contain a pin for communications between the modules and
the MPC controller.
FS3
The backplane also incorporates the auxiliary PSU circuitry and
three module connectors.
FS5, FS9
Backplanes each support five and nine module connectors
respectively.