Installation manual

Table Of Contents

3.2.9 Installing/Replacing the Power Supply Unit

Function

PSU Type Lower/Upper Input Voltage Range Current Input Frequency

PSU-M

Lower: 100 V AC to 130 V AC 2.5 A

50 Hz or 60 Hz

Upper: 200 V AC to 240 V AC 1.4 A

PSU-L

Lower: 100 V AC to 130 V AC 5.1 A

Upper: 200 V AC to 240 V AC 2.55 A

When you are installing multiple shelves, make sure that the total ampere rating of all the devices plugged into the AC outlet does

not exceed the ampere rating of either the AC outlet or the breaker.

AC Inlet

Power Switch

PSU-M/PSU-L

Ground Terminal

Accessories and User-supplied Items

Accessories (included): Screws ´ 4, AC power cord ´ 1

User-supplied (not included): Grounding wire

WARNING

• Each PSU complies with Safety Class 1 of IEC60950, EN60950, UL60950,

CAN/CSA-C22.2 No.60950, and AS/NZS60950; therefore a protective ground connection exists

between the mains outlet ground and the PSU case. To ensure the PBX chassis is safely

grounded, it is essential that the PSU case be securely fastened to the PBX chassis with the 4

screws provided with each PSU.

• Never install or replace a PSU during a lightning storm.

• Never install or replace a PSU in wet locations.

• Never install or replace a PSU unless at least 20 s has elapsed after the AC supply is

disconnected.

Notice

When installing or replacing a PSU, read Important Safety Instructions and Important Information in

this manual carefully, and always follow these guidelines to reduce the risk of fire, electric shock and injury.

Note

For details about frame ground connection, refer to "3.2.10 Frame Ground Connection".

Document Version 2009-12 Installation Manual 109

3.2.9 Installing/Replacing the Power Supply Unit