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Caution
We strongly recommend that all Neptronic
prevent interference with, and/or possible damage to incompatible equipment. When multiple actuators are wired on a single transformer, polarity must be observed. Long
wiring runs create voltage drop which may affect the actuator performance.
Mechanical Installation
MOUNTING
BRACKET
Wiring Diagrams
Analog
1
COMMON (-)
SUPPLY (+)
For 4 to 20mA control signal, connect supplied 500 Ohm resistor between
pins 1 and 3.
For 2 to 10Vdc feedback signal, connect supplied 500 Ohm resistor
between pins 1 and 5.
3-wire/Digital 2 positions
2.2K
1
Common (-)
Drive CW
Drive CCW
24Vac (+)
Note: In Digital Mode, the actuator is sensitive to induced electrical voltages from external sources. To prevent interference, install a
2.2k Ohm, 0.5 W resistor (included) between pins 1 and 3 and another between pins 1 and 4 of TB1 as shown above.
Note: In any of the above wiring configurations, connect a supplied 500 Ohm resistor between pins 1 and 5 for a 2-10Vdc feedback
signal.
www.neptronic.com
®
products be wired to a separate transformer and that transformer shall service only Neptronic
CLUTCH
2
3
4
5
FEEDBACK
4 to 20 mA
2 to 10 Vdc
2.2K
2
3
4
5
Feedback
4 to 20 mA
BM Series Actuators
Specification and Installation Instructions
Manually close the damper blades and position the
1.
actuator at 0º or 90º.
Slide the actuator onto the shaft.
2.
Tighten the nuts on the "U" bolt to the shaft with an 8mm
3.
wrench to a torque of 60 in.lb. [6.7 Nm].
Slide the mounting bracket under the actuator. Ensure free
4.
movement of the slot at the base of the actuator. The
bracket pin must be placed in the mid distance of the slot.
Fix the bracket to the ductwork with #8 self-tapping screws.
5.
PWM
1
2
COMMON (-)
SUPPLY (+)
4-wire/Digital 3 point floating
2.2K
1
2
Common (-)
Drive CW
Drive CCW
24Vac (+)
®
products. This precaution will
3
4
5
FEEDBACK
4 to 20 mA
PWM CONTROL SIGNAL
2.2K
3
4
5
Feedback
4 to 20 mA
2
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