IBM TotalStorage 2109 M12, Installation And Service Manual

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Chapter 5. Installing and removing Model M12 switches
This chapter describes how to install the 2109 Model M12 switch into a 2109 Model
C36 cabinet, and how to remove an M12 from the cabinet.
One M12 is installed in the cabinet at the factory. The cabinet is designed to
support one additional 2109 Model M12, which can be added on site.
Before you install additional switches into the cabinet, be familiar with the following
installation considerations and safety guidelines. Also refer to “Safety and
environmental notices” on page xi for additional safety information and notices.
>98 kg (215 lb)
PN 18P5002
SJ000625
CAUTION:
The weight of this part or unit is more than 115
kilograms (250 pounds). It takes specially trained
persons with a lifting device to safely lift this part or
unit. (C011)
CAUTION:
A fully populated M12 weighs approximately 115 kg (250 lbs). Before you
install it, verify that the additional weight of the chassis does not exceed the
cabinet’s weight limit or unbalance the cabinet. When you calculate the
additional weight, include the cards or power supplies that partially extend
out of the chassis.
Attention: To ensure adequate cooling, install the chassis with the port side
facing the aisle where exhaust air is released (usually called the service aisle). This
prevents the fans from pulling in heated exhaust air.
Before you install an additional M12 into the cabinet, perform the following tasks:
v Ensure that a space that is 14U high, 74 cm (29 in.) deep, and 48 cm (19 in.)
wide is available in the cabinet.
v
Ensure that there is a minimum distance of 71.75 cm (28.25 in.) between the
front and back rails of the cabinet.
v
Verify that the additional weight of the chassis does not exceed the weight limit of
the cabinet.
v Ensure that all equipment that is installed in the cabinet is grounded through a
reliable branch circuit connection. Do not rely on a secondary connection to a
branch circuit, such as a power strip.
v
Plan for managing the cables before you install the chassis. You can manage the
cables in a variety of ways, such as:
– Routing the cables below the chassis
– Routing the cables to either side of the chassis
– Routing the cables through the cable channels on the sides of the cabinet
– Using the patch panels
v
Ensure that the power directors have two dedicated electrical branch circuits with
the following characteristics available for use:
– 200–40 V ac, 30 amps
– 50–60 Hz
© Copyright IBM Corp. 2004
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