6
MACH 4000
Release 11/08
Only connect the mains voltage when the power supply units are se-
curely screwed to the housing.
If you are using the M4-POWER power unit chassis: Check the config-
uration of the connection plug and the power supply cable to the switch
chassis before you connect an external voltage to the M4-POWER in-
puts.
Only use connection cables that are permitted for a temperature range
from 0 °C to 60 °C.
Warning: The power supply cables between the M4-POWER
power unit chassis and the MACH 4000 are hot-
swappable. Note the sequence for connecting the cables: First
connect the power supply cable(s) between M4-POWER and
MACH 4000. Then connect the power supply (AC or DC, de-
pending on the plug-in power unit) for the M4-POWER.
Relevant for North America:
Warning: Install an input fuse in the ungrounded voltage cables
for every voltage supply connection. For the AC input of the AC/
DC plug-in power units, use a nominal rating of not more than 10
A - slow-blow characteristic. For the DC input of the DC plug-in
power units at P1 and P2, use a nominal rating of not more than
20 A - slow-blow characteristic.
Do not use a redundant voltage supply at P1 and P2 simulta-
neously if one of the “+” connections of P1 or P2 is grounded.
For the current conductors at the voltage input of the AC/DC
power units, use a cable cross-section of at least AWG16.
For the current conductors at the voltage input of the DC power
units, use a cable cross-section of at least AWG12.
Use copper conductors 75 °C only.
Shielding ground
The shielding ground of the connectable twisted pairs lines is connected
to the front panel as a conductor.
Beware of possible short circuits when connecting a cable section with
conductive shielding braiding.
Housing
Only technicians authorized by Hirschmann are permitted to open the
housing.
The device is grounded via the voltage supply socket.
Summary of Contents for HIRSCHMANN MACH 4000 Series
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