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2 I/O Modules
2.1 Analog Input Modules
2.1.1 750-481/003-000 [2 AI RTD EEx i]
2-Channel Analog Input Module for RTDs, EEx i
2.1.1.1
View
Function AI 1
Fig. 2.1.1-1: 2-Channel Analog Input Module 750-481/003-000
2.1.1.2
Description
The 750-481/003-000 analog input module processes signals from resistance
sensors that are operating in hazardous environments of Zones 0 and 1. It
allows the connection of Pt and Ni resistance sensors potentiometers.
The installation of the WAGO-I/O-SYSTEM 750 is to be done in Zone 2 or in
non- hazardous environments.
The operating mode of the 750-481/003-000 can be set by using the WAGO-
I/O-CHECK 2 start-up and diagnostic tool (Item No.: 759-302). The default
setting is Pt 100.
Depending on the operating mode, the resistance value is converted to a
temperature or directly sent out by the module. A microprocessor within the
module is used for converting and linearizing the measured resistance value
into a numeric value proportional to the temperature of the selected resistance
sensor.
WAGO-I/O-SYSTEM 750
I/O Modules
13 14
15 16
Error AI 1
+R1 +R2
+R 1
R1 R2
RL 1
-R1 -R2
S
Shield
(screen)
-R 1
750-481/
003-000
750-481/003-000 [2 AI RTD EEx i]
Function AI 2
Error AI 2
Data contacts
2-conductor 3-conductor
+R 2
RL 2
S
Shield
(screen)
-R 2
Power jumper contacts
• 7
View
Resistance
measuring
Potentiometer
g048100e
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