2.4 Universal inputs connection
2.4.1 Analog sensors connection
The device allows to measure the voltage applied to the inputs in the range of 0 ... 31 V.
When connecting analog FLS or other sensors for which the output voltage has to be monitored, the voltage
measurement profile must be set in the inputs setting. In this case, the function of adjustable averaging of measured values
and the setting of the threshold level for fixing the voltage measurement event become available.
CPU_adc
R
1
R
2
UIN
C
1
+U
Figure 14. Connection of analog sensors
2.4.2 Discrete sensors connection
The device allows to connect any type of sensors that have two steady states: "on" ("activated") and "off" ("normal").
The voltage thresholds at which the device fixes the sensor on (activating) or off (switching to normal) depend on
the line profile setting and the set levels on the voltage scale. In order to operate with discrete sensors, the “Discrete NO
+”, “Discrete NC +”.
CPU_adc
R
1
R
2
UIN
C
1
2–10
кОм
+U
Figure 18. Connection of normally open (NO-) sensors
2–10
кОм
+U
CPU_adc
R
1
R
2
UIN
C
1
Figure 19. Connection of normally closed (NC-) sensors
Summary of Contents for SMART S-2420
Page 11: ...Figure 11 Figure 12...
