ABB FEN-31 User Manual page 23

23
Resistor configuration for open collector HTL encoder
For open collector HTL encoder, the OUT+ channel (A+/B+/Z+) is
actively driven low when the transistor closes the circuit. When
transistor opens the circuits the signal line is passively pulled high
by the 1.5 kilo-ohm load resistor in FEN-31.
Resistor configuration for open emitter HTL encoder
For open emitter HTL encoder, the OUT+ channel (A+/B+/Z+) is
actively driven high when the transistor closes the circuit. When
transistor opens the circuits the signal line is passively pulled low
by the 1.5 kilo-ohm load resistor in FEN-31.
Installation