Weidmuller WI-I/O-EX: Wireless I/O Expansion Modules v1.11 - Manual (Page 16)

WI-I/O-EX Serial I/O Module User Manual v1.11
Page 16 February 2010
2.2.3.3 Floating Differential Voltage Inputs
Differential voltage inputs allow a voltage to be measured when it cannot be referenced
to earth or ground. The diagram in Figure 2-9 shows how to connect differential voltage
inputs. The module has a 27V common mode input range.
Figure 2-9: Connection for differential voltage input mode.
Note:
- The module configuration needs to be changed for this type of input
- To change the input configuration, refer to section 4.4
V-
AIN3
AIN4
AGND
WI-I/O-EX-1-S-12 Module
ALS +24V
Sensors with
voltage signals
AIN1
AIN2
+
-
+
-