Chapter 2 Installing the Cisco MDS 9500 Series
Removing and Installing a Power Supply or PEM
Se n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a ck - d o c @ c i s c o . c o m .
Removing and Installing the PEMs on the Cisco MDS 9506 Director
Note For instructions on connecting the cables to the PEMs, see the “Connecting the Power Supplies” section on page
The Cisco MDS 9506 Director uses PEMs to provide an input power connection on the front of the chassis. In addition, the PEM provides current protection, surge and EMI suppression, and filtering functions. An AC PEM is required for each AC power supply, and a DC PEM for each DC power supply.
The PEM that is on the left when viewed from the front of the switch (PEM 1) connects the site power source to power supply 1 (upper power supply); the PEM on the right (PEM 2) connects the site power source to power supply 2 (lower power supply).
Note You need a
Removing an AC PEM
To remove an AC PEM from a Cisco MDS 9506 chassis, follow these steps:
Step 1 Remove power from the PEM by pressing the power switch to off (0).
Step 2 Loosen the captive screws and pull the PEM of the chassis, supporting the PEM from underneath.
Step 3 If the PEM bay is to remain empty, install a filler panel over the opening and tighten the captive screws to 8
Removing a DC PEM
Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Statement 1003
To remove a DC PEM from a Cisco MDS 9506 chassis, follow these steps:
Step 1 Ensure that all power is off by locating the circuit breaker on the panel board that services the DC circuit. Switch the circuit breaker to the off position, and tape the switch handle of the circuit breaker in the off position.
Step 2 Loosen the captive screws and pull the DC PEM from the chassis, holding it by the edges.
Step 3 Remove the cables from the DC PEM by removing the terminal block screws, and then removing the ring lugs from the screws. See Figure
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