7-13
C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C621-01
Three pins are grouped together to form a channel.
Table 7-1 Channels of the Analog Input Module
Pin
Name
Value Channel
AI1-U Voltage input
AI1-I Current input
Channel 1 (AI1)
AI1-M Reference potential
AI2-U Voltage input
AI2-I Current input
Channel 2 (AI2)
AI2-M Reference potential
AI3-U Voltage input
AI3-I Current input
Channel 3 (AI3)
AI3-M Reference potential
AI4-U Voltage input
AI4-I Current input
Channel 4 (AI4)
AI4-M Reference potential
Only an analog sensor can be connected to an analog input channel.
Voltage Measurement
Current
Voltage
Reference potential
Nj
Single channel voltage measurement
Figure 7-8 Connection of a Channel for Voltage Measurement
Current Measurement
Current
Voltage
Reference potential
Nj
Single channel current measurement
Figure 7-9 Connection of a Channel for Current Measurement
Channels
Connection to an
Analog Input
C7-621 Analog I/Os
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