Remove the DC Power Supply
Note |
This equipment is suitable for installation in Network Telecommunications Facilities and locations where the NEC applies. The equipment is suitable for installation as part of the Common Bonding Network (CBN). |
Caution |
The grounding architecture of this product is DC-isolated (DC-I) for DC-powered products. DC-powered products have a nominal operating DC voltage of 48 VDC. Minimal steady state DC operating voltage is 19.2 VDC. |
Procedure
Step 1 |
Before servicing the power supply, switch off the circuit breaker in your equipment area. As an additional precaution, tape the circuit-breaker switch in the Off position. |
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Step 2 |
Slip on the ESD-preventive wrist strap that was included in the accessory kit. |
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Step 3 |
Switch the power supply circuit-breaker switch to the Off (O) position. |
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Step 4 |
Pull the terminal block plug connector out of the terminal block head in the power supply. |
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Step 5 |
Loosen the captive screw on the DC power supply. See the figure below.
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Step 6 |
Grasping the power supply handle with one hand, pull the power supply out from the chassis while supporting it with the other hand. |
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Step 7 |
Replace the DC power supply within 5 minutes. |
Install the DC Power Supply
Procedure
Step 1 |
Ensure that the system (earth) ground connection has been made. For ground connection installation instructions, see the Installing the Chassis Ground Connection section. |
Step 2 |
If present, remove the blank power supply filler plate from the chassis power supply bay opening by loosening the captive installation screws. |
Step 3 |
Verify that power to the DC circuit connected to the power supply you are installing is off. To ensure that power has been removed from the DC circuits, locate the circuit breakers for the DC circuits, switch the circuit breakers to the OFF position, and tape the circuit-breaker switches in the OFF position. |
Step 4 |
Grasp the power supply metal tab with one hand. Place your other hand underneath the power supply. Slide the power supply into the power supply bay as shown in the figure below. Make sure that the power supply is fully seated in the bay. |
Step 5 |
Tighten the captive installation screw of the power supply. The recommended maximum torque is 5.5 inch-pounds (.62 newton meters). If you are installing a redundant DC power supply, repeat these steps for the second power source too. |