Section BXM‐10N‐HE3‐20A
030‐101741 Rev. B
R
5
1311IARB
Figure 6.
Door Sensor Switch Location
Door Switch (prewired
to controller card)
Function
Quantity
Description
Customer
2
2.5” knock‐out for 2” conduit
3
1.125” concentric knock‐out, can be
used for 1/2” or 3/4” conduit.
Network
2
2.5” knock‐out for 2” conduit
2
1.125” concentric knock‐out, can be
used for 1/2” or 3/4” conduit.
Battery
Box
5
0.58” knock‐outs for attaching an op
tional battery box below the cabinet.
Table 1. Knock‐out Sizes and Quantities
2.2
Interior Features
The interior cabinet features are described hereunder.
Figure 7.
Isometric View of Rack Channels and Brackets
10 RUs of Vertical
Rack Space
Left
Slotted Channel
Adjustment Bracket
(provides 6 channel positions)
One
1
2
3
4
5
6
Right
Channel
Channel
Hardware shown exploded
for visual clarity only.
Simply loosen hex
bolts to adjust.
channel
position
Hex bolt
(1”)
2.2.1
Door Sensor Switch
A door sensor switch is located at the bottom right corner of the
cabinet door opening (Figure 6). This switch is factory‐prewired
to the Controller Card for door alarm reporting purposes. To
temporarily disable the sensor, pull out the cylindrical door
switch actuator until it clicks. To re‐activate the sensor, either
gently push the actuator back in until a click is heard, or simply
close the cabinet door.
2.2.2
Internal 19” Rack Channels
Two removable/adjustable rack channels inside the cabinet pro
vide 19” relay rack mounting for equipment that is to be
mounted in the cabinet. Each channel is installed so approxi
mately 5” of equipment space is available from the inside of the
closed front door to the channel (for up to a 5” equipment pro
jection), and approximately 12” of equipment space is available
behind the channel to the rear cabinet wall. The channels can be
moved forward 2” or backward 3”, if a few additional inches of
equipment depth is needed at either the front or back of the
channel. Six channel positions are provided in the channel
bracket. Simply loosen the hex nut, lift and slide the channel
backward or forward the next slot position, then tighten the nut.
Both vertical rack channels contain predrilled holes, with stan
dard hole spacings (either 1”, 1.75”, or 2” rack hole patterns), to
mount customer‐supplied equipment in the cabinet. Network
equipment up to 10 Rack Units (10 RUs = 17.5”) high can be
mounted on the internal rack inside the cabinet, either as a
single piece or multiple pieces of equipment.
‐ LEFT CHANNEL NOTE ‐
Access to the controller card may be limited if one of the front‐
most channel mounting positions is chosen for the left channel.
2.2.3
Cooling System
The Boxer cabinet features an active heat‐exchange system that
compensates for the effects of internal equipment heat and ex
ternal solar and temperature loading inside the cabinet. The
heat exchanger fans are temperature activated. The fans turn
on when the interior of the cabinet reaches 35° C (95° F) and
turn off when the internal cabinet temperature cools to 25° C
(77° F). At the core of the heat exchange system are numerous
aluminum fins (best seen in Figure 2) on each “side” of a sealed
divider wall within the heat exchanger. The dual air‐path ex
changer uses one set of fans (shown in Figure 8) to blow cool
outside air past the “exterior air side” fins of the heat exchanger
and to direct the heated air out the screened holes on the sides
of the fan cover. Conversely, a second set of fans (shown in
Figure 2 and Figure 6) circulates warm inside air down past the
“interior air side” fins of the heat exchanger and blows cooled air
back through the main cabinet compartment. Both sets of fans
are field‐replaceable (see Table 4 for part numbers).
2.2.4
External‐Air Fans
(“
FAN A” Connector)
Two, factory‐installed, temperature‐controlled fans (shown in
Figure 8) to circulate cooler exterior air up through the heat ex
changer are located under the cover of the heat exchanger
compartment. These fans are factory‐wired to the “FAN‐A” con
nector on the controller card mounted on the left side wall of the
cabinet, and are powered from either a field‐pr24VDC
