Advant
®
Controller 450 User’s Guide
Chapter 2 Installation
2-46 3BSE 002 415R701 Rev A
2.2.15.5 Subrack, Connection Unit, Circuit Board
Table 2-9. Subrack, Connection Unit, Circuit Board
Item Concerning Action
Mounting rail
(for connection
units)
Ground connection to
cabinet chassis via
mounting screws
If problems, check R < 100 mΩ,
measured with equipment switched off and
ribbon cables disconnected
Subrack Ground connection to
cabinet chassis via
mounting screws
If problems, check R < 100 mΩ,
measured with equipment switched off and
ribbon cables disconnected
Connection unit Ground connection to
mounting rail via mounting
screws
All screws fully tightened
Mounting rail
mounted outside
the cabinet
(1)
or in nonstandard
cabinet
(1) This application does not meet the limits for emission and therefore is not generally allowed within
the EEC area (EU, EFTA).
Electrical connection to
cabinet from both ends of
mounting rail.
Internal or external cabling
to connection unit must be
kept apart.
R < 100 mΩ,
A = 10 mm
2
in tele rack
2,5 mm
2
in the cabinet
Spacing > 100 mm
Circuit board with
0V at X2
Grounding of 0V Connection to chassis from X2 0V
<50 mm
Connection Quality Only correctly made, screwed or clamped
connections are approved
Note: Inspected and approved tools must be
used
Circuit boards Variant reference Check for lowest revision approved variant to
be used for the equipment and use replace-
ment of the same or higher revision number.
This item is mainly relevant to maintenance
and use of spare parts.
Circuit boards Assembly Check that all units located in the subracks
are properly inserted.
Analog input circuit
boards
Full accuracy in the
frequency range
DSAI 130A + DSTA 135 (131)
The other analog units can have for some
frequencies in frequency range 0.15 MHz to
60 MHz error > 0.2%