Spectra T-Finity, Site Preparation Manual, Page: 24 / 38

Chapter 2 — Site Requirements Physical Requirements
March 2015 Site Preparation Guide — Spectra TFinity Library
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The two top pins are voltage inputs. The bottom pin is ground. As shown in
Figure 9 , the top input voltage pins are labeled A and B, from left to right,
and the bottom pins are labeled C. Confirm the following measurements:

The voltage from A to A or B to B should be less than 4 V.

The voltage from A to B or B to A should be between 200 and 240 V.

The voltage between any A or B pin to either C pin should be about 120 V.
Each library frame is rated at 200–240 VAC at 13 amps (2600 watts
maximum). This power rating is based on a main frame with 24 LTO drives
and 6 RIMs, which is the configuration for maximum power consumption
by a single frame. The frames are not rated at 120 VAC due to the high
current required to supply the product.
Due to electromagnetic interference (EMI) filtering in each dual AC power
supply, the leakage current for main frames and drive frames is such that
they require a secure connection from the chassis of the unit to an earth
ground.
Use one or more of the following methods for securing a ground
connection when installing a main frame or drive frame:
Notes:

Cord lock brackets and cords with locking connectors are not
compatible and cannot be used simultaneously.

Expansion Frame Power Modules do not require locking
cords or special grounding.

Add cord lock brackets (Spectra Logic part number 5497) to all drive
frames. See “Installing Cord Locks” in the Spectra TFinity Library User
Guide for more information.

Use a cord with locking connectors at both ends, such as L6 20P to
locking C19 (Spectra Logic part number 9594).

Use a dedicated external ground wire (Spectra Logic part number
91017013) from the chassis screw lug to the building’s earth ground.
Figure 9 Dual AC input voltage requirements.
240 V
120 V
120 V
A B
C
240 V
0 V
120 V
120 V
< 4 V
240 V
240 V
A B
C
< 4 V