Installation
• 15
Fieldbus Dependent I/O Module
PROFIBUS DP
4.2.2 Connection of the Module Supply Voltage
The connection of the module supply voltage and earth ground is made on
terminal blocks carrying the following labeling:
•
24 V (red terminal block)
•
0 V (blue terminal block)
•
(green terminal block)
Connection of earth ground to the base module’s ground terminal is required
for reliable module operation.
4.2.3 Connection of the Input Signals
The input signal connection group is identified by the imprint “INPUT” on the
base module. Three terminals are available for each digital input. The termi-
nals for one input are shown superimposed.
1
2
3
17 18 19
33 34 35
24 V
0 V
Input
grey
Color
red
blue
Supply of the field devices
Vertical connection group for one channel
Fig. 4-8: Sensor connection
g1xxx03e
2-conductor sensors, e. g. switches, are connected to the grey and red terminal
blocks.
3-conductor sensors receive their 24 VDC supply voltage through the connec-
tion to the red and the blue terminal blocks. The output signal of the 3-
conductor sensor is connected to the grey terminal block.
1
1
2
2
3
3
17
17
18
18
19
19
33
33
34
34
35
35
grey
grey
red
red
blue
blue
Color
Color
grey
grey
red
red
blue
blue
Color
Color
Fig. 4-9: Examples of a sensor connection
g1xxx04e
