32
Installation MACH 1040
Release
04
10/2015
2.3 Connecting the power unit connections
for supply voltage and signal contact
The supply voltage is electrically isolated from the housing.
The voltage supply is connected via a 3-pin terminal block with screw locking.
The signal contact is connected via a 2-pin terminal block with screw locking
(1 or 2 locks, depending on the device design).
For device variants without PoE: The supply voltage in
MACH1040/MACH1140 device types can be connected redundantly with two
power units. Both inputs are uncoupled.
MACH 1040 devices without PoE
MACH 1040 device variants without Power over Ethernet (PoE) are,
depending on the device type, equipped with 1 or 2 power supply units of
the following type:
Type “L”
Type “M”
See “General technical data” on page 43.
For devices without PoE featuring 2 power supply units, you can connect
the supply voltage redundantly. Both inputs are uncoupled. With a non-
redundant supply of the supply voltage, the device reports the loss of a
supply voltage. You can prevent this message by applying the supply
voltage via both inputs, or by changing the configuration in the
Management.
MACH 1040 devices with PoE
MACH 1040 device variants with Power over Ethernet (PoE) are
equipped with 2 power supply units.
Power supply unit 1 is freely selectable from the combination table.
Power supply unit 2 is a PoE power supply unit.
See “Combination options” on page 15.
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