13
RELAY CONTROL SYSTEM ELECTRICAL INSTRUCTIONS
Remove the cover of the NEMA-4 station and note the location of the N/O and N/C
terminals for each button. The N/O terminals are located closer to the base and are on
the “right” side of the station. The N/C terminals are raised and are on the “left” side.
Use a short piece of green wire from the 5-
conductor “Thermo Wire” and jumper
between one of the N/O terminals on the Open button and one of the N/O terminals on
the Close button. Also connect the free end of the green wire in the 5-conductor bundle
to one of these terminals.
Connect the rest of the wires as shown in the following photo. Note that the yellow and
red wires go to the N/C terminals on the Stop button.
Route the cable through one of the station knockouts and carefully reinstall the cover.
Make sure that the cover is installed properly and that the buttons work freely.
