Agromatic ESR-NK Series, Installation And Operating Manual, Page: 43 / 98

5 Assembly 5.3 Electrical connection
Actuators NK and VK, Position Controller ESR-NK 37
Fig. 5.7: PCB NK-Basic (design example)
Left-hand rotation
−
If mains voltage is applied between terminal 1 and 2 , the output shaft ro-
tates in left-hand direction (CCW).
−
This direction of rotation is limited by switch SL .
−
When the switch is operated, mains voltage is applied to terminal 4 .
−
Series VK: Limit switch SL is operated by control cam NL when the actu-
ator travels in the “push” direction (see Fig. 5.8).
Right-hand rotation
−
If mains voltage is applied between terminal 1 and 3 , the output shaft ro-
tates in right-hand direction (CW).
−
This direction of rotation is limited by switch SR .
−
When the switch is operated, mains voltage is applied to terminal 5 .
−
Series VK: Limit switch SR is operated by control cam NR when the ac-
tuator travels in the “pull” direction (see Fig. 5.8).
NOTE
If the actuator moves in opposite direction to the control commands, im-
mediately interrupt the actuator's supply voltage and check the wiring by
referring to the schematic diagram inside the hood.
Possible troubleshooting:
–
For AC motors: interchange the external connections of terminal 2 and
3.
Important information!
Any modification to the internal wiring is strictly forbidden!