Connecting The Bladecenter Ht Type 8740 To Dc Power - IBM 87401RU Installation And User Manual

Connecting the BladeCenter HT type 8740 to dc power:

The BladeCenter HT dc-power inputs are configured for dc isolated return (DC-I).
The dc RETURN (RTN) terminal or conductor is not connected to the equipment
frame or the grounding means of the equipment.
Attention:
authorized to make the connections to and disconnections from the dc power
source. IBM service technicians are not certified or authorized to install or remove
the dc power cables. The customer is responsible for ensuring that only trained
service personnel install or remove the dc power cables.
RTN
RTN
The BladeCenter HT type 8740 has four dc-power terminal connectors. Each dc
terminal has four #M6 (0.25-inch) studs, one for -48 V dc, one for RETURN (RTN),
and two for connecting the safety ground wire. Each terminal has a terminal cover.
Remove the terminal cover before connecting cables to each terminal and reinstall
the terminal cover on each terminal before supplying power to the BladeCenter HT
unit. For more information on removing and installing a terminal cover, see
"Removing a dc terminal cover" on page 42 and "Installing a dc terminal cover" on
page 61.
There are two types of terminal covers, depending on date of manufacture. The
following illustrations show both types of terminal boxes for the two types of
terminal covers.
Split washer
14
BladeCenter HT Type 8740 and 8750: Installation and User's Guide
Only trained service personnel, other than IBM service technicians, are
GND -48v
GND -48v
Flat washer
(optional)
Nut
-48v GND RTN
-48v GND RTN