User's Manual
A-9
Figure A-5 External Fan Assembly Interconnect Diagram (Sheet 2 of 2)
A.2.3
SHELF/RACK ALARM CONNECTION
Each MDR-8000 rack equipped with the Power Distribution Unit (PDU) 695-6200-001/002
has a visual rack alarm indicator to report a shelf failure. In order to activate a rack alarm
visual indicator on the PDU, the shelf alarm output from each MDR-8000 shelf must be
hardwired to connector J1 on the PDU. The shelf alarm is provided on alarm connector
J305 pin 24 (major/visual alarm). A wire-wrap adapter (PN 695-4171-002) for connector
J305 is available. Insulated 22-gauge solid copper wire is recommended for connecting to
the wire-wrap adapter. To attach to J1 (2-pin connector) on the PDU, use 2-position socket
housing PN 372-0114-140 and socket contact PN 372-0114-390. See Figure A-6 for shelf-
to-rack alarm wiring.
Each MDR-8000 rack equipped with PDU 3EM13317AA has a blown fuse alarm visual
indicator and a Form C relay alarm output (J4, J5, and J6) for connection to customer
alarm equipment.
An optional Fuse and Shelf alarm plug-in assembly is available to provide shelf alarm
connections requiring Form C relays. The alarm inputs (major and minor) must be
hard wired to J3 on the PDU. The alarms are provided on alarm connector J305 pin 24
(major/visual alarm) and pin 50 (minor/audible alarm) of each shelf. A wire-wrap
adapter (PN 695-4171-002) for connector J305 is available. Insulated 22-gauge solid
copper wire is recommended for connecting to the wire-adapter and also to J3 on the
PDU. Alarm outputs are transmitted to customer equipment via Form C relay outputs
(J4, J5, J6, relays 1 through 8). This option also includes the blown fuse alarm indica-
tor and Form C relay alarm output (J4, J5, and J6 – relay 9). See Figure A-6 for typi-
cal shelf to PDU alarm wiring.
FAN
ALM
CARD
PN 3EM11901ABAA
FAN CARD
(ON CommPak
INDOOR SHELF)
PN 3EM14508ABAA
EXT
FAN
ASSY
+12 VDC
GND
9
1
P302 J302
9
1
FAN CABLE ASSY
PN 3EM15115ABAA
1
2
3
1
2
3
J1 P1
2
P105
2
FAN
ALM
MDR-1024
06/09/04
J105
FAN
ALM
1
2
3
J302
9
1
J305
2
WIRE
COLOR
RED
BLK
BLU
FAN CABLE ASSY PIN-OUT AND COLOR CODE