Selection Guide

800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA
7
3
Technical Data
NFB24-MFT, NFB24-MFT-S,
NFX24-MFT, NFX24-MFT-S
P
ower supp
l
y 24 VA
C
±20%, 50
/
60 H
z
24 VD
C
+2
0%
/
-1
0%
P
ower consum
p
t
i
o
n
runn
i
n
g
6.5
W
holdin
g
3
W
Transformer sizin
g
9
VA
(
c
l
ass 2 power source
)
E
l
ec
tri
ca
l
co
nn
ec
ti
on
NFB..
.
3 ft, 18 GA appliance cable, 1/2" conduit
connecto
r
-S m
o
dels: two 3 ft, 18
g
au
g
e appliance cables
with 1/2” conduit connectors
NFX..
.
3
ft
[
1m
]
, 10 ft
[
3m
]
or 16 ft
[
5m
]
18 GA
appliance or plenum cables, with or without 1/2”
conduit connecto
r
-S models: Two 3
f
t [1m], 10
f
t [3m] or
16 ft [5m] appliance cables with or without 1/2"
conduit connectors
Overload protectio
n
e
l
ectron
i
c t
h
rou
gh
out 0 to 95° rotat
i
on
Operatin
g
ran
g
e Y
*
2 to 10 VDC, 4 to 20mA
(
default
)
variable
(
VDC, PWM, floatin
g
point, on/off
)
I
nput impedanc
e
100 k
Ω
for 2 to 10 VDC (0.1 mA)
500
Ω f
o
r 4 t
o
2
0
mA
1
5
00
Ω
for PWM, floating point, on/off
F
eedback out
p
ut U* 2 to 10 VDC (max. 0.5 mA
)
Tor
q
u
e
90 in-lb
[
10 Nm
]
minimu
m
Direction of rotation
*
s
prin
g
reversible with CW/CCW mountin
g
m
o
t
o
r
revers
ibl
e w
i
t
h
b
u
il
t-
i
n sw
i
tc
h
M
echanical an
g
le of rotation
*
95°
(
ad
j
ustable with mechanical end stop, 35° to
95°
)
R
unnin
g
tim
e
spring
< 20 sec @ -4°F to 122°F
[
-20°C to 50°C
];
< 60 sec @ -22°F
[
-30°C
]
motor
*
150 seconds (de
f
ault), variable (40 to 220 secs)
A
ngle of Rotation Adaptation
*
off (Default)
Override control
*
min position = 0%
mid. position = 50%
max. position = 100
%
Pos
iti
o
n in
d
i
ca
ti
on
visual indicator, 0° to 95
°
(
0° is
f
ull sprin
g
return position
)
Ma
n
ua
l
o
v
e
rri
de
5 mm hex crank
(
³⁄
₁₆
"
Allen
)
, supplied
H
umidit
y
max. 95% RH non-condensin
g
A
m
bi
ent tem
p
eratur
e
-22°F to 122°F
[
-30°
C
to 50°
C]
Stora
g
e temperatur
e
-40°F to 176°F
[
-40°C to 80°C
]
H
ousin
g
Nema 2, IP54, Enclosure T
yp
e
2
H
ousin
g
materia
l
zinc coated metal and plastic casin
g
Ag
ency listin
gs
†
cULus acc. to UL60730-1A/-2-14
,
CAN/CSA E60730-1:02
,
CE acc. t
o
2
00
4
/
1
08/
E
C
&
2
006/95/
E
C
N
o
i
se
l
eve
l
≤40dB(A) motor
@
150 seconds, run time
d
epen
d
en
t
≤62dB(A) spring return
S
ervicin
g
m
a
int
e
n
a
n
ce
f
r
ee
Qualit
y
standar
d
I
SO
900
1
W
e
i
g
ht
4.2
lb
s
(
1.9
k
g
)
, 4.4
lb
s
(
2.0
k
g
)
w
i
t
h
sw
i
tc
h
e
s
*Variable when con
f
igured with MFT options
.
† Rated Impulse Voltage 800V, Type of action 1.AA (1.AA.B for -S version), Control Pollution Degree 3.
Programmed
f
or 40 sec motor run time. At 150 sec motor run time, trans
f
ormer sizing is 6.5 VA and
power consumption is 4.5 W running
/
3 W holding
.
NFB24-MFT-
S
, NFX24-MFT-
S
A
ux
ili
ary sw
i
tc
h
e
s
2 x
S
PDT 3A (0.5A)
@
250 VA
C
, UL approve
d
one set at +10°, one adjustable 10° to 90°
Tiilb
•
T
or
q
ue m
i
n. 90
i
n-
lb
•
Control 2 to 10 VDC
(
DEFAULT
)
•
Feedback 2 to 10 VDC
(
DEFAULT
)
Applicatio
n
F
or proportional modulation of dampers and control valves in HVA
C
systems. The
N
FB24-MFT and NFX24-MFT provides mechanical spring return operation for reliable
fail-safe application.
D
efault/Confi
g
uratio
n
D
efault
p
arameters for 2 to 10 VDC a
pp
lications of the NFB24-MFT and NFX24-MFT
a
ctuator are assigned during manufacturing. If required, custom versions of the
a
ctuator can be ordered. The parameters noted in the Technical Data table are
v
ariable.
Th
ese parameters can
b
e c
h
ange
d
b
y t
h
ree means:
•
Pre-set confi
g
urations from Belimo
•
C
ustom confi
g
urations from Belimo
•
Confi
g
urations set by the customer usin
g
the MFT PC tool
(
version 3.4 or hi
g
her
)
s
oftware application
.
•
H
a
n
d
h
e
l
d
ZTH-
G
E
N
Op
eratio
n
T
he NFB24-MFT, NFX24-MFT actuator
p
rovides 95° o
f
rotation and is
p
rovided with a
g
raduated position indicator showin
g
0° to 95°. The actuator will synchronize the 0°
mechanical stop or the damper or valves mechanical stop and use this point
f
or its
z
ero position durin
g
normal control operations.
T
he actuator uses a brushless DC motor which is controlled by an Application Specific
I
nte
g
rated Circuit
(
ASIC
)
and a microprocessor. The microprocessor provides the
i
ntelligence to the A
S
I
C
to provide a constant rotation rate and to know the actuator’s
exact position. The ASIC monitors and controls the brushless DC motor’s rotation and
p
rovides a Di
g
ital Rotation Sensin
g
(
DRS
)
function to prevent dama
g
e to the actuator
i
n a stall condition. The position
f
eedback si
g
nal is
g
enerated with out the need
f
or
mechanical feedback potentiometers usin
g
DRS. The actuator may be stalled
a
nywhere in its normal rotation without the need o
f
mechanical end switches
.
T
he NFB24-MFT, NFB24-MFT-S, NFX24-MFT and NFX24-MFT-S is mounted directly to
c
ontrol shafts u
p
to 1.05” diameter b
y
means of its universal clam
p
and anti-rotation
b
racket. A crank arm and several mountin
g
brackets are available for damper
app
lications where the actuator cannot be direct cou
p
led to the dam
p
er shaft. The
s
pring return system provides minimum speci
f
ied torque to the application during a
p
ower interruption. The NFB24-MFT, NFB24-MFT-S, NFX24-MFT and NFX24-MFT-S
a
ctuator is shipped at +5°
(
5°
f
rom
f
ull
f
ail-sa
f
e
)
to provide automatic compression
ag
ainst damper
g
askets for ti
g
ht shut-off
.
NOTE: Re
f
er to Multi-Function Technolo
g
y documentation
.
Dimensions (Inches [mm])
W
AFBNFBDim
NFB24-MFT, NFB24-MFT-
S
, NFX24-MFT, NFX24-MFT-
S
Proportional, Spring Return, Multi-Function Technology
Proportional
,
S
®
K7-2 (supplied)
1/2" Centered
(Default)
3/4" Centered
(Field Selectable)
1.05" Centered
(Field Selectable)
M40024 - 05/10 - Subject to change. © Belimo Aircontrols (USA), Inc.