122 • I/O modules
Digital Inputs 750-408, -409
Modular I/O System
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4.2.1.1.11 4 Channel Digital Inputs
(DC 24V, 3.0 ms / 0.2 ms)
750-408, -409
13 14
+ +
-
-
15 16
13 14
C
D
B
A
750-408
DI 2
Power jumper contacts
Data contacts
DI 4
DI 2
Status
24V
0V
DI 4
DI 3
DI 1
Status
DI 1
DI 3
Technical description
The power supply is connected to the power jumper contacts on each I/O mo-
dule for the respective operating voltage. Power connections are made auto-
matically from module to module when snapped onto the DIN rail, with power
supplied through a power feed module.
The 4-channel digital inputs are suitable for the direct connection of two 3-
conductor sensors (V+, 0V, signal). The power distribution module 750-614 is
available for the connection of more sensors to V+ and 0V.
The modules 750-408 and 750-409 are low-side switching (sinking, NPN).
RC filters are series-connected for noise rejection and switch debouncing.
They are available with time constants of 3.0 ms and 0.2 ms.
The positions of the different I/O modules in the configured node/station are
selectable by the user. A block type configuration is not necessary.
These input modules can operate with all buscouplers of the
WAGO-I/O-SYSTEM.