Digital Input Modules; Channel Digital Input Module With Diagnostics; Channel Digital Input Modules; Table 367: 1 Channel Digital Input Module With Diagnostics - WAGO -I/O-SYSTEM 750 Manual

336 I/O Modules
13.2.1

Digital Input Modules

Digital input modules supply one bit of data per channel to specify the signal
state for the corresponding channel. These bits are mapped into the Input
Process Image.
Some digital modules have an additional diagnostic bit per channel in the Input
Process Image. The diagnostic bit is used for detecting faults that occur (e.g.,
wire breaks and/or short circuits).
When analog input modules are also present in the node, the digital data is
always appended after the analog data in the Input Process Image, grouped into
bytes.
13.2.1.1

1 Channel Digital Input Module with Diagnostics

750-435

Table 367: 1 Channel Digital Input Module with Diagnostics

Input Process Image
Bit 7
13.2.1.2

2 Channel Digital Input Modules

750-400, -401, -405, -406, -410, -411, -412, -427, -438, (and all variations),
753-400, -401, -405, -406, -410, -411, -412, -427

Table 368: 2 Channel Digital Input Modules

Input Process Image
Bit 7
13.2.1.3 2 Channel Digital Input Module with Diagnostics
750-419, -421, -424, -425,
753-421, -424, -425

Table 369: 2 Channel Digital Input Module with Diagnostics

Input Process Image
Bit 7
Manual
1.5.0
750-882 Media Redundancy ETHERNET Controller
Bit 6 Bit 5 Bit 4
Bit 6 Bit 5 Bit 4
Bit 6 Bit 5 Bit 4
WAGO-I/O-SYSTEM 750
Bit 3 Bit 2
Diagnostic
Bit 3 Bit 2
Channel 2
Bit 3 Bit 2
Diagnostic Diagnostic
bit S 2 bit S 1
Channel 2 Channel 1 Channel 2
Bit 1 Bit 0
Data bit
bit
DI 1
S 1
Bit 1 Bit 0
Data bit Data bit
DI 2 DI 1
Channel 1
Bit 1 Bit 0
Data bit Data bit
DI 2 DI 1
Channel 1