WAGO 750 Series User Manual

I/O Modules • 151
Process Data Architecture for MODBUS/TCP
WAGO-I/O-SYSTEM 750
Linux Fieldbus Coupler
7.2.3 Analog Input Modules
The hardware of an analog input module has 16 bits of measured analog
data per channel and 8 bits of control/status. However, the
coupler/controller with MODBUS/TCP does not have access to the 8
control/status bits. Therefore, the coupler/controller with MODBUS/TCP
can only access the 16 bits of analog data per channel, which are grouped
as words and mapped in Intel format in the Input Process Image.
When digital input modules are also present in the node, the analog input
data is always mapped into the Input Process Image in front of the digital
data.
1 Channel Analog Input Module
750-491, (and all variations)
Input Process Image
Byte Destination
Offset
High Byte Low Byte
Remark
0 D1 D0 Measured Value U
D
1 D3 D2 Measured Value U
ref
2 Channel Analog Input Modules
750-452, -454, -456, -461, -462, -465, -466, -467, -469, -472, -474, -475,
-476, -477, -478, -479, -480, -481, -483, -485, -492, (and all variations),
753-452, -454, -456, -461, -465, -466, -467, -469, -472, -474, -475, -476, -
477, -478, -479, -483, -492, (and all variations)
Input Process Image
Byte Destination
Offset
High Byte Low Byte
Remark
0 D1 D0 Measured Value Channel 1
1 D3 D2 Measured Value Channel 2

WAGO 750 Series Specifications

General

Protection Class	IP20
Bus Couplers	PROFIBUS, CANopen, Ethernet
Modules	Digital Input, Digital Output, Analog Input, Analog Output
Mounting	DIN rail mounting
Voltage Supply	24 V DC (typical)
Communication Protocol	Depends on the bus coupler (e.g., PROFIBUS, CANopen, DeviceNet, Ethernet)
Digital Input Channels	Varies by module (e.g., 8, 16 channels)
Digital Output Channels	Varies by module (e.g., 8, 16 channels)
Analog Input Channels	Varies by module (e.g., 2, 4, 8 channels)
Analog Output Channels	1, 2, 4 channels (depending on module)
Width	12 mm, 24 mm (typical module widths)
Number of Channels	Varies by module type
Current Consumption per Channel	Varies by module type