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Figure 3-15 Connecting power to the ONS 15252 MCU
Connect the MCU power cable to the A side of the PDP. Be sure the poles are correct.
Step 6
Insert the power cables into the connector and tighten the wire retaining screws.
Step 7
Align and connect the power cable with the PS-1 connector (right side) on the MCU backplane.
Step 8
Tie-wrap the power cable to the MCU.
Step 9
Step 10
Reinsert the A-side and B-side BDB and PDP fuses.
Verify that A- and B-side -48 VDC and -48 VDC return (0 VDC) of the MCU are connected to the proper
Step 11
poles at the power source. The -48 VDC return must be connected to ground the PDP on both the A and
B sides.
Verify that the incoming power is within the range of –42 VDC to –56 VDC before applying power.
Step 12
Install the Network Control Board (NCB) and Communication Interface module (CIM) temporarily to
Step 13
determine if the ONS 15252 MCU has power. The LEDs on the CIM and NCB are green when the MCU
has power.
To obtain an accurate LED reading, do not insert an NCB in a CLIP slot while the corresponding
Note
NAM is inserted. You must first remove the corresponding NAM if you want to insert the NCB in a
CLIP slot.
3.4.3 Install the ONS 15252 MCU Fiber Cable
Always use the supplied electrostatic discharge (ESD) wristband when working with an ONS 15252
Caution
MCU.
The ONS 15252 MCU Client Layer Interface Port (CLIP) modules and the DWDM interface port use
SC fiber connectors.
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Chapter 3
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