Simex SPI-638, User Manual

Page: 14 / 68

User manual - FLOW METER SPI-638
Construction of pulse input allows connecting of inductive or optical sensor with common earth
(
Figure 4.14 ) or common plus ( Figure 4.15 ), without additional intermediary circuits (sensor
with PNP or NPN type output).
Figure 4.14. An example of sensor connection with common earth
Figure 4.15. An example of sensor connection with common plus
14
- Uo +
16 17 18 19 20 22 21
n.c. n.c.
pulse
input
COM
-
+
NPN type sensor
n.c.
pulse
input
- Uo +
16 17 18 19 20 22 21
n.c. n.c.
COM
+
-
PNP type sensor
n.c.