High Density HDX DC Power Distribution
Center Product Literature
Installation Instructions- HDX Rack mount combination GMT fuse and circuit breaker panel.
Parts provided with unit: 2 RU rack mount chassis, 19”/23” reversible rack mount ears with hardware
kit, rear clear cover kit, chassis ground lug mounting screws, flip-up door assembly.
1. Remove unit from shipping box and confirm all parts are present and no damage is observed
2. Select correct orientation for rack mount ears to fit the destination equipment rack: 19” or 23”.
Attach each ear to the side of the chassis with the hardware provided. Mount unit in the
destination equipment rack
3. The HDX is available in several configurations: The most common is the A/B isolated input
version. This configuration assumes that the panel is fed via two separate DC input circuits from
either two separate DC power systems or via two redundant circuit breaker feeds from a single
power system. The single input version assumes use via a single power source feeding the panel
input. Confirm the version that you have and review the rear panel input bus bar configuration
for input DC power connections. Note the A and B input -48V input bus bars on the left rear of
the panel for the dual A/B input version. The single input version will only have the “A” input bus
bar present.
4. Connect -48VDC power source cable connections to the A and B input -48VDC bus bars. Confirm
again that you have connected the Negative (-) 48V power source polarity to these input bus
bars. Connect the Positive (+) 48V power source cable connections to the return bus bar located
on the right rear of the panel. There is an “A” side and “B” side return bar for the A/B isolated
version of the HDX with a red fiberglass insulating plate between the bus bars. The single input
version does not have this insulating plate. Connect the +48V Return cables to the appropriate A
or B sides of the return bus assembly.
5. If desired, connect a dedicated chassis ground cable with two-hole lug to the chassis ground
location on the left rear side of the chassis. There are two bolts provided for this connection
point.
6. Flip up the front panel door - you may have to loosen the left and right captive screws on the
front panel first. Observe the internal legend plate which indicates the A and B side circuit
breaker socket locations and the A and B side GMT fuse sockets. The HDX is designed to accept
A/B isolated inputs and feed A/B isolated circuit breaker outputs. 6 A and 6 B positions are
provided for bullet terminal circuit breakers. The Circuit breakers are a non-alarm contact type
AM series and are available from Comm/net Systems. Circuit breaker amperage ratings are
available from 1 to 100 Amperes. Plug in the appropriate ampacity circuit breakers to feed the
particular circuit output for the equipment being fed by the HDX. GMT fuse sockets are provided
for use for low current loads which may be present in the equipment rack if desired. This allows
the user to dedicate the circuit breaker slots for high current load use and GMT fuse sockets to
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feed light loads. GMT fuses are also available from Comm/net from 1/4A to 15A fuse ratings.
Plug in the appropriate fuses as desired.
HDX Controller PCB Circuit Breaker Inventory Switches
Image Captions
Circuit breaker inventory programming dip switches located on underside of flip up front panel door.
Switch pressed to the right indicates an installed circuit breaker for that position.
GMT Fuse socket location and Fuse fail indicator LED. Blown fuse will light LED, operate alarm contacts fuse trip flag on GMT fuse body will flip up as well.
Chassis Ground lug connection point.
GMT fused output terminal block, alarm contacts RJ45 jacks and terminal block.
HDX Controller General Operation
Front panel LED indicators: A Power Input, B Power input, Breaker/Fuse Trip.
Displays A and B input power present via BLUE LEDS, Circuit breaker/fuse trip Alarm via RED LED.
Alarm Display Mode:
Breaker/Fuse trip RED LED will illuminate when either a circuit breaker is turned off, tripped off or a
GMT fuse blows. This indicator function will only work correctly if the circuit breaker inventory dip
switches on the controller PCB have been programmed to confirm which circuit breakers are installed in
the unit. The HDX is shipped programmed with all breakers installed.
Alarm Contacts:
Major Alarm:
Contacts operate if either a circuit breaker is turned off or trips or a GMT fuse blows. This contact can
also indicate other failure conditions if the HDX is equipped with the advanced controller system.
Minor Alarm:
Used only if the HDX is equipped with the advanced controller system.
Alarm contact connections are located on the HDX rear panel. The alarms are available via two
connection points:
An RJ45 Jack pair or via a set screw terminal block. The alarms are connected to each of these
terminations in parallel. The RJ 45 jack system allows standard cat 5 LAN jumper cables to be connected
in daisy chain fashion from rack to rack for installations of multiple HDX panels in equipment racks in a
row. The Set screw terminal block allows alternate alarm connection via any wire connection desired by
the end user.
RJ45 Alarm Pin-out:
Major alarm: Pin 1: Common, Pin 2: Normally closed, Pin 3: Normally open.
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Minor alarm: Pin 4: Common, Pin 5: Normally closed, Pin 6: Normally open.
Terminal block Pin-out:
Terminal block J1: Major Alarm: Pin 1: Common, Pin: 2: Normally closed, Pin 3: Normally open.
Minor alarm: Pin 4: Common, Pin 5: Normally closed, Pin 6: Normally open.
The typical user alarm connection is to connect to the Major Alarm common and normally open
connections. When a circuit breaker is turned off, trips or a fuse blows, these contacts will close for
remote alarm monitoring.
General Specifications
Model #
Configuration
Part #
Description
Specifications, part numbers, support information.
Common Specifications for All Models
Dimensions: 17" W x 3.5" H (2 RU) x 12.5" D (incl. bus bar protrusion)
Weight: 13 lbs
Rack mount via 19/23" reversible rack mount ears
Two mounting positions: Front flush or mid-mount
Rear clear cover panel for bus bar termination area
Plug-in bullet terminal circuit breakers: Select amperage rating and quantity at time of order
Input Specifications:
Voltage: -40VDC to -60VDC
Current: 300 Amperes per input bus.
Output Specifications:
Circuit Breakers— AM Series, Bullet Terminal Style, Without Alarm Contacts
12 bullet terminal circuit breaker positions: 6A, 6B for A/B isolated version or 12 for single input version.
Circuit breakers available from 1A to 100A rating. Total load cannot exceed 300A per input bus for A/B
isolated version or 300A total for single input version. IE “A” Side circuit breakers 1-6 cannot exceed an
aggregate output load of 300A and “B” side breakers 1-6 cannot exceed an aggregate output load of
300A. Single input version is rated for total load for 12 output breakers cannot exceed 300A.
GMT Fuses— 15A Maximum Fuse Ratin
8 GMT fuse socket positions: 4A, 4B for A/B isolated version or 8 for single input version.
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Total A/B load for all 8 GMT fuse sockets cannot exceed 60A.
GMT fuses available from 1/4A to 15A each.
Rear Panel Terminations
A,B -48VDC input bus bars, A,B +48VDC return bus bars, A,B circuit breaker protected -48VDC output
terminals, A/B return +48VDC output terminals, GMT -48VDC fused terminals, GMT +48VDC return
terminals, RJ45 alarm contact jacks (2 qty), 6 position set screw terminal block for alarm contacts,
chassis ground lug landing termination.
Parts and Accessories
 Reversible 19”/23” rack mount ears with mounting hardware
 Chassis ground lug landing 1/4”x20 bolts (2 qty)
 Rear panel clear plastic protective cover with mounting hardware
Bullet Terminal Circuit Breakers
CSI Part#
470-235-10
470-402-10
470-403-10
470-407-10
470-400-10
470-406-10
470-404-10
470-269-10
Description
10 AMP AM Breaker, Plug-in Type, Midtrip (5/16" Bullet Terminals)
20 AMP AM Breaker, Plug-in Type, Midtrip (5/16" Bullet Terminals)
30 AMP AM Breaker, Plug-in Type, Midtrip (5/16" Bullet Terminals)
40 AMP AM Breaker, Plug-in Type, Midtrip (5/16" Bullet Terminals)
60 AMP AM Breaker, Plug-in Type, Midtrip (5/16" Bullet Terminals)
80 AMP AM Breaker, Plug-in Type, Midtrip (5/16" Bullet Terminals)
100 AMP AM Breaker, Plug-in Type, Midtrip (5/16" Bullet Terminals)
200 AMP AM Breaker, (2 Pole) Plug-in Type, Midtrip (5/16" Bullet Terminals)
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