SSG 500 M Series Hardware Installation and Configuration Guide
54 Device Power Components (SSG 550M Only)
Installing a Power Supply Unit
To install an AC PSU, perform the following steps:
1. Attach an ESD grounding strap to your bare wrist, and connect the strap to the
ESD point on the chassis or to an outside ESD point if the device is
disconnected from earth ground.
2. Using both hands, slide the PSU into the chassis until you feel resistance.
3. Firmly push the power supply into the chassis until it comes to a stop. Make
sure that the PSU is flush with any other adjacent PSU.
4. Insert the appliance-coupler end of a power cord into the appliance inlet on the
power-supply faceplate.
5. Insert the power-cord plug into an AC power-source receptacle.
6. Verify that the power cord does not block access to device components or
drape where people might trip on it.
To install a DC PSU, perform the following steps:
1. Attach an ESD grounding strap to your bare wrist, and connect the strap to the
ESD point on the chassis or to an outside ESD point if the SSG device is
disconnected from earth ground.
2. Using both hands, slide the PSU into the chassis until you feel resistance.
3. Firmly push the power supply into the chassis until it comes to a stop. Make
sure that the PSU is flush with any other adjacent PSU.
4. Attach the feed wires to the terminal block.
5. Tighten the retaining screws on the terminal block.
6. See “DC Power” on page 27 before turning on the current to the DC PSU.
NOTE: If you are not reinstalling a power supply into the emptied slot, install a blank
power-supply faceplate over the slot.
NOTE: Each power supply must be connected to a dedicated AC power feed.
WARNING: Before installing a DC power supply, you must shut off current to the
DC feed wires that lead to the power supply.
CAUTION: Ensure that the DC cables do not touch the two screws on the chassis
that are adjacent to the terminal block. Contact between the DC cables and the
chassis screws will cause a circuit failure.
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