ABB DSMC112 57360001-HC DSMC 112 Floppy Disk Controller
The cabinet has been designed using the MNS cabinet system of ABBThe design consists of a skeletal frame to which
the outer panels are bolted to. Corrosion resistant
materials are used to protect the cabinet from cor rosion.
The basic elements of the frame are C-shaped steel
profiles with screw holes at a regular distance of 25
mm. The profiles are hot-dip zinc-coated. The
outer panels are bolted to the C-shaped profiles
with self-tapping screws. The panels are also pro tected by hot-dip zinc-coating.
The outside of the doors and the side panels are
painted to enhance the appearance of the cabinet.
The standard color is RAL 7035.
EMC has been achieved by applying an EMC sealing
around the doors, the rear and the side panels
(approximately 2 mm thick). The cabinet’s inside
panels are not painted, because paint tends to
reduce the effectiveness of metallic bonding which
is important for successful EMC.
All doors of the drive and the transformer are either lockable or bolted.
Additionally, the door of the DFE-INU compart ment (3) is equipped with a safety switch. The
safety switch is tied into an interlocking circuit
that prevents the door being opened as long as the
DC link of the drive is charged.
The door of the control compartment (1) is not
integrated into the interlocking circuit and can
always be opened.
For further information, see:
• 10.6.6 Emergency release of the door safety
switch
• 10.6.7 Door handles
The standard drive and the standard integrated transformer are each
equipped with fan units, whose number depends on the frame size.
2.6.1 Fan unit configurations
Optionally, the drive and the integrated trans former can have a redundant fan configuration,
ensuring full operation in the event of fan failure.
• ACS2000 drives with output power of 1 MVA are
associated with smaller fan units:
877 × 653 × 448 mm
• ACS2000 drives with output power of 2 to 4
MVA are associated with larger fan units:
957 × 764 × 486 mm

2.6.2 Function
Fan groups
For control reasons, the fan unit(s) of the drive and
the integrated transformer are combined to
groups.
• Fan unit 1 of the drive and fan unit 1 of the inte grated transformer belong to group 1.
• Fan unit 2 of the drive and fan unit 2 of the inte grated transformer belong to group 2.
• Fan unit 3 of the drive and fan unit 3 of the inte grated transformer belong to group 3.
The fan units of a group are always switched on
and off together.
Starting, stopping
The standard fan unit or fan group 1 is switched on
by the control system of the drive when the
charging of the DC link is initiated. When the drive
is stopped, the fan units continue to run for a pre set time after the main power has been switched
off and the DC link voltage has decreased below a
preset value.
Air flow inside the drive
The fan unit feeds the cooling air to the main
power electronic components and transfers the
heat to the outside of the cabinet.
The air enters the drive cabinet through the lou vered panels at the front, passes the phase mod ules in the DFE-INU compartment and the EMC
filter and exists through the fan outlet at the front.
Air flow monitoring
The air flow through the cabinet of the integrated
transformer (2-17: 1) and the cabinet of the drive
(2-17: 2) is monitored by air pressure switches (2-
17: arrows).
Separate air pressure switches in each cabinet
monitor the air flow through the filter mats and the
air flow through the cabinets.
When the filter mats are clogged and the pressure
drop reaches the specified final pressure loss, the
message Conv1CoolAirFilter is displayed on the
CDP control panel and the alarm/fault lamp lights
up on the control compartment door.
When a fan of the drive or a fan of the integrated
transformer fails, the control system of the drive
switches on the stand-by fan automatically. The
failure of a fan is indicated on the CDP control
panel of the drive as follows:
• CoolCircuit1Alm if a fan of the drive fails
• CoolCircuit2Alm if a fan of the integrated trans former fails
• The alarm fault lamp starts to flash.