For nominal steady state voltage of –48 VDC, the operating voltage range for the chassis is
–40.5 VDC (minimum) to –57.6 VDC (maximum).For nominal steady state voltage of –60
VDC, the operating voltage range for the chassis is –50.0 VDC (minimum) to –72.0 VDC
(maximum).
Note
b) To verify the ground, place the black test lead of the voltmeter to the frame ground. Place the red test lead
on the A-side return ground and verify that no voltage is present. Place the red test lead on the B-side
return ground and verify that no voltage is present.
Step 2
To power up the node, insert the fuse into the fuse position according to site practice. The fuse rating must
not exceed 40 A.
Step 3
Using a voltmeter, verify the ONS 15454 M6 shelf for –48 VDC or –60 VDC battery and ground:
a) To verify the A-side of the shelf, place the black lead of the voltmeter to the frame ground. Place the red
test lead to the –48 V or –60 V (A-side battery connection) red cable. Verify that it reads between –40.5
VDC and –72.0 VDC. Then place the red test lead of the voltmeter to the RET1 (A-side return ground)
black cable and verify that no voltage is present.
For nominal steady state voltage of –48 VDC, the operating voltage range for the chassis is
–40.5 VDC (minimum) to –57.6 VDC (maximum).For nominal steady state voltage of –60
VDC, the operating voltage range for the chassis is –50.0 VDC (minimum) to –72.0 VDC
(maximum).
Note
b) To verify the B-side of the shelf, place the black test lead of the voltmeter to the frame ground. Place the
red test lead to the –48 V (B-side battery connection) red cable. Verify that it reads between –40.5 VDC
and –72.0 VDC. Then place the red test lead of the voltmeter to the RET2 (B-side return ground) black
cable and verify that no voltage is present.
To view the shelf voltage and temperature, see the
NTP-G230 View Shelf Voltage and
.
Note
If the ONS 15454 M6 shelf is being powered at –60 VDC nominal voltage, the door must be
kept closed during regular operation.
Note
Step 4
Return to your originating procedure (NTP).
Fan-Tray Assembly
The fan-trays supported on the ONS 15454 M6 shelf are 15454-M6-FTA and 15454-M6-FTA2. The
15454-M6-FTA2 fan-tray provides increased airflow when compared to the 15454-M6-FTA fan-tray. The
15454-M2-FTA2 is compatible with R9.2.0 and later releases.
The fan-tray assembly is located on the left side of the ONS 15454 M6 shelf. The fan-tray is removable and
holds the fan-control circuitry and the fans for the ONS 15454 M6 shelf. It has a single dual-color LED on
the faceplate. When the fan-tray assembly is not functioning or when the power line is not connected, the
LED is OFF. When the power line is connected and if there is no TNC, TNCE, TSC, or TSCE card installed
in the ONS 15454 M6 shelf, then the LED is OFF. A red LED indicates an alarm in the fan-tray assembly. A
green LED indicates that the fan-tray assembly is functioning, the power line is connected, and the power
module is functioning properly. The shelf controller card controls the conditions that result in triggering the
LEDs. The LED can be overwritten by the shelf controller card (TNC, TNCE, TSC, or TSCE) in all the three
states (OFF/red/green). The fan-tray assembly supports the lamp test procedure. After you install the fan tray,
you should only access it if a fan failure occurs.
Installing the ONS 15454 M6 Shelf
117
Installing the ONS 15454 M6 Shelf
Fan-Tray Assembly
