Belimo AFB24-SR - AFB24-SR N4;AFX24-SR N4 Series

800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN
59
Torque min. 180 in-lb, for control of air dampers
A
pp
licatio
n
For proportional modulation of dampers in HVAC systems. Actuator sizing should be
done in accordance with the damper manufacturer’s specifications
.
The actuator is mounted directly to a damper sha
f
t up to 1.05” in diameter by means
o
f its universal clamp. A crank arm and several mountin
g
brackets are available for
a
pplications where the actuator cannot be direct coupled to the damper shaft
.
The actuator operates in response to a 2 to 10 VDC, or with the addition of a 50
0
Ω
r
esistor, a 4 to 20 mA control in
p
ut from an electronic controller or
p
ositioner. A 2 to
10 VDC feedback signal is provided for position indication. Not to be used for a
master-slave a
pp
lication
.
O
p
eratio
n
The AFB N4
(
H
)
, AFX N4 series actuators provide true sprin
g
return operation for
r
eliable fail-safe application and positive close-off on air ti
g
ht dampers. The sprin
g
r
eturn s
y
stem
p
rovides constant tor
q
ue to the dam
p
er with, and without,
p
ower
appli
e
d
to t
h
e actuator
.
The AFB N4(H), AFX N4 series provides 95° of rotation and is provided with a
gra
d
uate
d
pos
i
t
i
on
i
n
di
cator s
h
ow
i
ng 0° to 95°.
The AFB24-SR N4(H), AFX24-SR N4 uses a brushless DC motor which is controlled by
a
n Application Specific Integrated Circuit (ASIC) and a microprocessor. The
microprocessor provides the intelli
g
ence to the A
S
I
C
to provide a constant rotation rate
a
nd to know the actuator’s exact fail-safe position. The A
S
I
C
monitors and controls the
b
rushless D
C
motor’s rotation and provides a digital rotation sensing function to
p
revent
d
amage to t
h
e actuator
i
n a sta
ll
con
di
t
i
on.
Th
e actuator may
b
e sta
ll
e
d
a
nywhere in its normal rotation without the need o
f
mechanical end switches.
The AFB24-SR-S N4
(
H
)
, AFX24-SR-S N4 version are provided with two built-in
a
uxiliary switches. These SPDT switches provide safety interfacing or signaling, for
example,
f
or
f
an start-up. The switching
f
unction at the
f
ail-sa
f
e position is
f
ixed at
+10°, the other switch
f
unction is adjustable between +10° to +90°
.
A
TTENTI
O
N: AFB24-SR(-S) N4(H) and AFX24-SR(-S) N4
c
ann
ot
be tandem
mounted on the same dam
p
er or valve shaft. Onl
y
On/Off and MFT AF models can
b
e used
f
or tandem mount a
pp
lications.
Dimensions (inches [mm])
6.77” [172]
Clamp Congurations
1/2” Field Selectable 3/4” Centered 1.05” Centered
(Default) (Field Selectable)
12.99” [330]
6.45” [163.9]
0.39” [10]
0.92” [23.4]
3.62” [92.1]
9.37” [238] 1.12” [28.5]
3.36” [85.2]
3.5” [0.14]
0.81” [20.5]
1.17” [29.8] 0.79” [20]
D
312_Confi
g
Technical Data AFB24-SR N4(H) AFB24-SR-S N4(H),
AFX24-SR N4 AFX24-SR-S N4
Power su
pp
l
y
24 VAC ±20%
,
50/60 H
z
24 VD
C
+20%
/
-10%
P
ower consumpt
i
on runn
i
ng
5
.
5
W
/
h
ea
t
e
r 2
5
W
h
o
ldi
n
g
3
W
Trans
f
ormer sizing 6 VA (class 2 power source) / heater 25 V
A
Electrical connectio
n
AFB... N4 3 ft, 18
G
A appliance cable, 1
/
2" conduit
connecto
r
-
S
models: two 3
f
t, 18 gauge appliance cables
with 1/2” conduit connector
s
h
eater
(
N4H
)
terminal block
,
26-16 GA
AFX... N4
3
ft
[
1m
]
, 10 ft
[
3m
]
or 16 ft
[
5m
]
18 GA
appliance or plenum cables, with 1/2” conduit
connecto
r
-S m
o
dels: Two 3
f
t
[
1m
]
, 10
f
t
[
3m
]
or
16 ft
[
5m
]
appliance cables with 1/2" conduit
connec
t
ors
O
verload
p
rotectio
n
electronic throu
g
hout 0 to 95° rotation
O
peratin
g
ran
g
e Y 2 to 10 VD
C
, 4 to 20m
A
Input impedanc
e
100 k
Ω
for 2 to 10 VD
C
(0.1 mA
)
500
Ω
f
or 4 to 20 mA
Feedback output U 2 to 10 VDC
(
max. 0.5 mA
)
Torque 180 in-lb
[
10 Nm
]
minimu
m
Direction of rotatio
n
sprin
g
reversible with CW/CCW mountin
g
Inside housin
g
m
oto
r
revers
ibl
e w
i
t
h
b
u
il
t-
i
n sw
i
tc
h
M
echanical angle o
f
rotatio
n
95°
(
a
dj
usta
bl
e w
i
t
h
mec
h
an
i
ca
l
en
d
stop, 35° to
95°
)
R
unn
i
ng t
i
me
m
o
t
o
r
95 secon
d
s
spr
i
n
g
< 20 seconds
@
-4°F to 122°F [-20°
C
to 50°
C
]
;
< 60 seconds @ -22°F
[
-30°C
]
sprin
g
(
with heater
)
< 20 seconds
@
-4°F to 122°F
[
-20°
C
to 50°
C];
< 60 seconds
@
-49°F
[
-45°
C]
P
os
iti
o
n in
d
i
ca
ti
on
visual indicator, 0° to 95
°
(
0° is full sprin
g
return position
)
Ma
n
ua
l
o
v
e
rri
de
5 mm hex crank
(
³⁄
₁₆
"
Allen
)
, supplie
d
Humidit
y
max. 95% RH non-condensin
g
Ambient tem
p
eratur
e
-22°F to 122°F
[
-30°
C
to 50°
C]
with heate
r
-49°F to 122°F [-45°
C
to 50°
C]
S
torage temperature -40°F to 176°F [-40°
C
to 80°
C]
Housin
g
UL Type 4, NEMA 4, IP6
6
H
ous
i
n
g
mater
i
a
l
po
l
ycar
b
onate
A
g
ency listin
gs
†
cULus acc. to UL60730-1A
/
-2-14
,
C
AN
/CS
A
E60730-1:02
,
CE acc. to 2004/108/EC &
2
006/95/
E
C
N
o
i
se
l
e
v
e
l ≤40dB(A) motor @ 95 second
s
≤
62dB(A) spring return
S
ervicing m
a
int
e
n
a
n
ce
fr
ee
Q
ualit
y
standar
d
I
SO
9001
Weigh
t
9.7 lbs (4 kg); 10 lbs (4.5 kg) with switche
s
10.5 lbs (4.8 kg
)
† Rated Impulse Voltage 800V, Type of action 1.AA (1.AA.B for -
S
version),
C
ontrol Pollution Degree 4.
A
FB24-
S
R-
S
N4(H), AFB24-
S
R-
S
N4
Auxiliary switches 2 x
S
PDT 3A (0.5A)
@
250 VA
C
, UL approve
d
one set at +10°, one a
dj
usta
bl
e 10° to 90
°
AFB24-SR N4(H), AFB24-SR-S N4(H), AFX24-SR N4, AFX24-SR-S N
4
N
EMA 4, Proportional, Sprin
g
Return, 24 V, for 2 to 10 VDC or 4 to 20 mA Control Si
g
na
l
N40103 - 09/11 - Subject to change. © Belimo Aircontrols (USA), Inc
.