SMC Networks LECPA Series - Page 48

- 47 -
● Photo coupler: ON
Inside of the driver
Positioning unit
NP+/PP+
NP-/PP-
● Photo coupler: OFF
Inside of the driver
Positioning unit
NP+/PP+
Line driver
NP-/PP-
[About the photo coupler ON/OFF in the LECPA pulse input circuit during differential input connection]
Command pulse
signa
High
Low
Line driver
A current is passing
through the circuit.
No current is in the
circuit.
Photo coupler: OFF
Photo coupler: ON
Command pulse
signa
Low
High