Owner's manual

BRAY Series 70 Electric Actuator
Operation and Maintenance Manual
11
external Signal feedbacK POtentiOMeter
Potentiometers for external feedback can be eld installed
on all continuous duty actuators. Actuators which are not
continuous duty do not have a pot gear tted on their indicator
shafts & must be tted with a new shaft which has a pot drive
gear for feedback pot (see Options: Auxiliary Switches).
feedbacK POtentiOMeter Kit cOnSiStS Of:
1. One potentiometer assembly
2. Two #6 cross drive pan head screws
3. Two #6 internal lockwashers
4. One 4 point terminal strip
5. One terminal strip marker for feedback pot
6. One small wiring diagram sticker for the additional
potentiometer
tOOlS required:
• For terminal wiring Screwdriver,
3
/
16
” tip at blade
• For pot mounting screws Screwdriver, No.2 phillips
inStallatiOn PrOcedure:
1. The potentiometer installs next to the camshaft where
there are two threaded holes provided for it.
2. The potentiometer assembly must be mounted in the
correct orientation, with the actuator in its fully open
(counter clockwise) position, the indicator shaft should
be in-line with raised green rib on pot gear.
3. Push the assembly towards the cam to mesh the pot
gears. Then tighten the mounting screws.
4. Rotate the actuator handwheel so that the red cam lobe
is facing the body of the potentiometer. Make sure that
the cam is not touching the potentiometer assembly.
Readjust the assembly position if necessary.
5. Fit the 4 point terminal strip and marker in the kit. Be-
fore laying down the marker, cut it to obtain a marker
as illustrated: opposite
6. Wire the pot to the terminal strip using the small stick-on
wiring diagram provided.
7. Adhere the wiring diagram sticker to the inside of
the cover.
Set the POtentiOMeter:
1. Manually operate the actuator handwheel until the unit
is in the fully closed position.
2. Rotate the black potentiometer drive gear adjustment
knob, to engage the potentiometer gear at the closed
position.
3. Manually operate the actuator to the fully open position.
auxiliary SWitcheS
Auxiliary switches are available / refer to chart on next page.
NOTES:
1. All auxiliary switches have voltage-free contacts.
2. Housing Sizes 6, 12, and 30 have double lobe cams.
Housing Size 180 has single lobe cams.
3. Main switches are one OPEN and one CLOSE switch.
4. Auxiliary switches are one OPEN and one CLOSE
switch, which are xed to activate 3° before the main
switches.
5. Adjustable auxiliary switches are adjustable to any
position.
inStallatiOn PrOcedure:
1. Cut terminal strip marker to length needed with letters
facing up.
2. Mount terminal strip and marker to switchplate using
two #4-40 screws.
1
7
8 9
2 3
4 5
6
D
C
B
A
Cut marker as needed (4-way
shown as example) and mount to
switchplate as shown.
Green Rib
Aux Terminal Strip