Submittal Sheet

800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA
3
06/10 - Sub
j
ect to chan
g
e. © Belimo Aircontrols
(
USA
)
, Inc
.
AFB24-SR
,
AFB24-SR-S
,
AFX24-SR
,
AFX24-SR-
S
Proportional, Sprin
g
Return, 24 V, for 2 to 10 VDC or 4 to 20 mA Control Si
g
na
l
Tor
q
ue min. 180 in-lb,
f
or control o
f
air dam
p
ers
Appl
i
cat
i
o
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 shaft up to 1.05” in diameter by means
of its universal clamp. A crank arm and several mounting brackets are available for
applications 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
resistor, a 4 to 20 mA control input from an electronic controller or positioner. A 2 to
10 VDC feedback signal is provided for position indication. Not to be used for a
master-slave a
pp
lication
.
Operatio
n
The AFB and AFX series actuators provide true spring return operation for reliable fail
-
s
afe application and positive close-off on air tight dampers. The spring return system
p
rovides constant tor
q
ue to the dam
p
er with, and without,
p
ower a
pp
lied to the
ac
t
ua
t
o
r
.
The AFB and AFX series provides 95° of rotation and is provided with a graduated
pos
i
t
i
on
i
n
di
cator s
h
ow
i
n
g
0° to 95°.
The AFB24-
S
R and AFX24-
S
R uses a brushless D
C
motor which is controlled by an
Application
S
pecific Inte
g
rated
C
ircuit
(
A
S
I
C)
and a microprocessor. The
microprocessor provides the intelli
g
ence to the A
S
I
C
to provide a constant rotation rate
and to know the actuator’s exact fail-safe position. The A
S
I
C
monitors and controls
the brushless D
C
motor’s rotation and provides a digital rotation sensing function to
prevent dama
g
e to the actuator in a stall condition. The actuator may be stalled
an
y
where in its normal rotation without the need o
f
mechanical end switches
.
The AFB24-SR-S and AFX24-SR-S versions are
p
rovided with two built-in auxiliar
y
s
witches. These
S
PDT switches provide safety interfacin
g
or si
g
nalin
g
, for example, for
f
an start-up. The switching
f
unction at the
f
ail-sa
f
e position is
f
ixed at +10°, the other
s
witch function is ad
j
ustable between +10° to +90°. The AFB24-SR, AFB24-SR-S,
AFX24-SR and AFX24-SR-S actuator is shipped at +5°
(
5° from full fail-safe
)
to
provide automatic compression a
g
ainst damper
g
askets
f
or ti
g
ht shut-o
ff.
ATTENTI
O
N
:
AFB24-SR
(
-S
)
and AFX24-SR
(
-S
)
canno
t
be tandem mounted on the
s
ame damper or valve shaft. Only On/Off and MFT AF models can be used for tandem
mount app
li
cat
i
ons.
Dimensions (Inches [mm])
K7-2 (supplied)
1/2" Centered
(Default)
3/4" Centered
(Field Selectable)
1.05" Centered
(Field Selectable)
WAFBNFBDim
Technical Data AFB24-SR, AFB24-SR-S,
AFX24-SR, AFX24-SR-S
P
ower su
pp
l
y
24 VAC ±20%
,
50/60 Hz
24 VD
C
+20%
/
-10%
Power consum
p
tio
n
r
unnin
g
5.5
W
h
oldin
g
3
W
T
rans
f
ormer sizin
g
8.5 VA (class 2 power source)
E
lectrical connectio
n
A
FB..
.
3 ft, 18
G
A appliance cable, 1
/
2" conduit
connec
t
or
-S models: two 3 ft, 18
g
au
g
e appliance cables
with 1/2” conduit connectors
AFX
..
.
3
f
t [1m], 10 ft [3m] or 16 ft [5m] 18
G
A
appliance or plenum cables, with or without 1
/
2”
conduit connecto
r
-
S
models:
T
wo 3
f
t
[
1m
]
, 10
f
t
[
3m
]
or
16 ft
[
5m
]
appliance cables, with or without 1/2"
con
d
u
i
t connectors
Overload
p
rotectio
n
electronic throu
g
hout 0 to 95° rotatio
n
Operatin
g
ran
g
e
Y
2 to 10 VDC, 4 to 20mA
In
p
ut im
p
edanc
e
1
00
k
Ω
for 2 to 10 VDC
(
0.1 mA
)
500 Ω
f
or 4 to 20 mA
Feedback output
U
2 to 10 VDC (max. 0.5 mA)
T
or
q
u
e
180 in-lb
[
20 Nm
]
minimum
Direction o
f
rotation sprin
g
reversible with CW/CCW mountin
g
mo
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 o
f
rotation 95°
(
ad
j
ustable with mechanical end stop, 35° to
95°
)
Runnin
g
time
sprin
g
< 20 seconds @ -4°F to 122°F
[
-20°C to 50°C
];
< 60 seconds
@
-22°F
[
-30°
C]
m
o
t
o
r
95
seco
n
ds
P
os
i
t
i
on
i
n
di
cat
i
o
n
v
i
sua
l
i
n
di
cator, 0° to 95°
(0° is full spring return position
)
Ma
n
ual
o
v
e
rr
ide
5 mm
h
ex cran
k
(
³⁄
₁₆
"
All
en
)
, supp
li
e
d
H
um
idi
ty
m
ax. 95%
RH
non-con
d
ens
i
n
g
A
m
bi
ent temperature -22°F to 122°F
[
-30°
C
to 50°
C]
S
tora
g
e temperature -40°F to 176°F
[
-40°
C
to 80°
C]
Housin
g
Nema 2, IP54, Enclosure T
yp
e
2
Housin
g
materia
l
zinc coated metal and plastic casin
g
Ag
ency
li
st
i
n
g
s
†
cULus acc. to UL60730-1A
/
-2-14,
C
AN
/CS
A
E60730-1:02,
C
E acc. to 2004
/
108
/
E
C
&
2006/95/EC
N
o
i
se
l
e
v
e
l ≤40dB
(
A
)
motor @ 95 seconds
≤62
dB(A)
spr
i
ng retur
n
S
ervicin
g
m
aintenance free
Quality standar
d
I
SO
900
1
W
eigh
t
4.6 lbs (2.1 kg); 4.9 lbs (2.25 kg) with switches
†
Rated Impulse Voltage 800V, Type of action 1.AA (1.AA.B for -S version), Control Pollution Degree 3.
AFB24-
S
R-
S
, AFX24-
S
R-
S
A
ux
ili
ary sw
i
tc
h
e
s
2 x SPDT 3A (0.5A) @ 250 VAC, UL approve
d
one set at +10°, one adjustable 10° to 90
°