I/O Modules
• 7
750-428 [4 DI AC/DC 42 V 20 ms]
WAGO-I/O-SYSTEM 750
I/O Modules
2 I/O Modules
2.1 Digital Input Modules
2.1.1 750-428 [4 DI AC/DC 42 V 20 ms]
4- Channel Digital Input Module AC/DC 42 V 20 ms,
2- conductor connection
2.1.1.1 View
E1 E2
E3 E4
13 14
C
D
B
A
E1 E2
E3 E4
750-428
DI 2
Data contacts
DI 4
DI 2
Status
DI 2
DI 4
DI 4
DI 3
DI 1
Status
DI 1
DI 3
DI 1
DI 3
Fig. 2.1.1-1: 4- Channel Digital Input Module 750-428
g042800e
2.1.1.2 Description
The digital input module 750-428 reads AC/DC 42 V values from digital field
devices (sensors, switches, etc.) using the differential inputs, and transmits,
depending on these values, binary control signals to the higher ranking
controls via the fieldbus coupler/controller.
The module is a 2-conductor device and has 4 input channels. Four sensors
may be directly connected to the module.
As an example, four 2-conductor sensors can be directly connected using
connection signal input DI1 and DI1 or DI2 and DI2, DI3 and DI3 or DI4 and
DI4.
Each input module has an RC noise rejection filter with a time constant of
20 ms.
All inputs are isolated.
The status of the four input channels is indicated via status LEDs.
