Environmental Control Equipment - Nortel DMS-100 Series Maintenance Manual

Cables that extend from the equipment side of the protector field pass
through a connectorized bulkhead panel. These cables connect to the
electronics equipment. The electronics compartment contains the bulkhead
panel. This panel filters and shields the EMI. Refer to the following figure
Bulkhead of termination compartment, view from electronics compartment
Bay 0

Environmental control equipment

One in. thick foil-faced, closed-cell boards with a minimum insulation value
of R8 insulate the cabinet. A positive temperature differential between
interior cabinet air and outside air controls humidity.
Electric strip heaters are on the right and left walls of the main equipment
compartment. Refer to the figures on pages 2-10 and 2-11. The heaters are
flat elements that provide standard surface heating.
Ground bar
SPC blocks
DMS-100 Family OPAC Maintenance Manual XPM12 and up
OPAC maintenance overview 2-11
Heater panels
Bay 3
Portions of battery
strings 2 and 6
.