Supply Voltage On The Back Of The Device; M4-Power Power Unit Chassis - Hirschmann MACH4000 Series User Manual

With redundant supply, the power supply unit with the higher output voltage
supplies the device on its own. The supply voltage is electrically isolated from
the housing.
With non-redundant supply of the mains voltage, the device reports a power
failure. You can avoid this message by changing the configuration in the
management, or, with power supply units of the same type, by feeding the
supply voltage in via both inputs.
The 0V connections within a DC module (M4-...-...VDC 300W) are connected
with each other.
The DC modules (M4-...-...VDC 300W) are grounded via the 3-pin DC socket
connection.
+
0V
Figure 8: Plug connections at the DC socket (external voltage supply)
1.3.1

Supply voltage on the back of the device

Plug-in power units for MACH4000 switch chassis


M4-S-AC/DC 300W
 M4-S-24VDC 300W, 2 inputs for redundant power supply

M4-S-48VDC 300W, 2 inputs for redundant power supply
See "Order numbers/product description" on page 61.
Note: The plug-in power units of the M4-POWER power unit chassis
cannot be used for the switch chassis.
M4-S-AC/DC 300W
1.3.2

M4-POWER power unit chassis

Note: Consider the sequence for the cabling of the power unit chassis.
See "Mounting the power unit chassis, connecting with the MACH4000
device" on page 43.
Installation MACH4000
Release 14 06/2013
M4-S-48VDC 300W
M4-S-24VDC 300W
19