Belimo AFB24-MFT - AFB24-MFT;AFX24-MFT Series: Technical Details; Technical Data and Multi-Function Technology; MFT Actuator Operation and Configuration

800-543-9038 USA 866-805-7089 CANADA 203-791-8396 LATIN AMERICA / CARIBBEAN
61
AFB24-MFT
,
AFB24-MFT-
S,
AFX24-MFT
,
AFX24-MFT-
S
P
roportional,
S
pring Return, 24 V, Multi-Function Technology
®
•
Tor
q
ue m
i
n. 180
i
n-l
b
•
C
ontrol 2 to 10 VD
C
(
DEFAULT
)
•
Feedback 2 to 10 VD
C
(
DEFAULT
)
A
pp
l
i
cat
i
o
n
F
or
p
ro
p
ortional modulation of dam
p
ers and control valves in HVA
C
s
y
stems. The
A
FB24-MFT, AFX24-MFT provides mechanical spring return operation
f
or reliable
f
ail-
s
a
f
e application.
D
efault/Configuratio
n
Default parameters for 2 to 10 VDC applications of the AFB24-MFT, AFX24-MFT
a
ctuator are assi
g
ned durin
g
manufacturin
g
. If required, custom versions of the
a
ctuator can
b
e or
d
ere
d
.
Th
e parameters note
d
i
n t
h
e
T
ec
h
n
i
ca
l
D
ata ta
bl
e are
va
ri
ab
l
e
.
T
hese parameters can be changed by three means:
• Pre-set configurations from Belimo
• Custom confi
g
urations from Belimo
•
C
onfi
g
urations set by the customer usin
g
the MFT P
C
tool
(
version 3.4 or hi
g
her
)
s
oftware application
.
• H
a
n
d
h
e
l
d
ZTH-
G
E
N
Operatio
n
T
he AFB24-MFT, AFX24-MFT actuator provides 95° of rotation and is provided with a
g
raduated position indicator showin
g
0° to 95°. The actuator will synchronize the 0°
mechanical sto
p
or the
p
h
y
sical dam
p
er or valve mechanical sto
p
and use this
p
oint
for its zero position durin
g
normal control operations. A unique manual override allows
the setting o
f
any actuator position within its 95° o
f
rotation with no power applied.
T
his mechanism can be released physically by the use of a crank supplied with the
a
ctuator.
Wh
en power
i
s app
li
e
d
t
h
e manua
l
overr
id
e
i
s re
l
ease
d
an
d
t
h
e actuator
d
rives toward the
f
ail-sa
f
e position
.
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 ASIC to provide a constant rotation rate and to know the actuator’s
exact position. The A
S
I
C
monitors and controls the brushless D
C
motor’s rotation and
p
rovides a Di
g
ital Rotation
S
ensin
g
(
DR
S)
function to prevent dama
g
e to the actuator
i
n a stall condition. The position
f
eedback si
g
nal is
g
enerated without 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 AFB24-MFT, AFX24-MFT is mounted directly to control sha
f
ts up to 1.05" diameter
by
means of its universal clam
p
and anti-rotation bracket. A crank arm and several
mountin
g
brackets are available for damper applications where the actuator cannot be
d
irect coupled to the damper sha
f
t. The sprin
g
return system provides minimum
s
pecified torque to the application durin
g
a power interruption. The AFB24-MFT,
A
FX24-MFT actuator is shipped at +5°
(
5°
f
rom
f
ull
f
ail-sa
f
e
)
to provide automatic
compression against damper gaskets
f
or tight shut-o
ff
.
N
O
TE: Please see documentat
i
on on Mult
i
-Funct
i
on Technolo
g
y.
Dimensions (Inches [mm])
A
FBNFBDim
Technical Data AFB24-MFT, AFB24-MFT-S,
AFX24-MFT, AFX24-MFT-S
P
ower supp
ly
24 VA
C
, +
/
- 20%, 50
/
60 H
z
24 VD
C,
+20%
/
-10
%
Powe
r
runnin
g
7
.5 W
consumpt
i
o
n
h
o
ldi
n
g
3
W
Transformer sizin
g
1
0 VA
(
Class 2 power source
)
Electrical connection
AFB..
.
3
ft, 18 GA appliance cable, 1/2" conduit connecto
r
-
S
models
:
two 3 ft, 18 gauge appliance cables with
1/
2” conduit connectors
AFX..
.
3
ft
[
1m
]
, 10 ft
[
3m
]
or 16 ft
[
5m
]
18
G
A appliance or
p
lenum cables, with or without 1/2” conduit connector
-
S
models
:
two
3
f
t
[
1m
]
, 10
f
t
[
3m
]
or
1
6 ft [5m] appliance cables with or without 1/2" conduit
connec
t
or
s
O
verload protectio
n
el
ectron
i
c t
h
rou
gh
out 0 to 95° rotat
i
on
Operating range Y* 2 to 10 VDC, 4 to 20 mA (default
)
variable
(
VDC, PWM, floatin
g
point, on/off
)
In
p
ut im
p
edanc
e
1
00
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 and on
/
off contro
l
Feedback output U
*
2 to 10 VDC, 0.5 mA ma
x
Torque
m
inimum 180 in-lb
(
20 Nm
)
Direction o
f
sprin
g
reversible with cw
/
ccw mountin
g
r
otation
*
m
o
t
or reversible with built-in switch
M
echanical
a
n
g
le of rotation
*
95°
(
ad
j
ustable with mechanical end stop, 35° to 95°
)
R
unn
i
n
g
t
i
me spr
i
n
g
<
20 sec @ -4°F to 122°F
[
-20° C to 50° C
]
;
<
60 sec @ -22°F [-30° C
]
mo
t
o
r*
1
50 seconds (default), variable (70 to 220 seconds
)
Angle of Rotation
a
daptation
off (default)
Override control*
m
in position = 0%
m
id. position = 50
%
m
ax. pos
i
t
i
on = 100
%
Posi
t
io
n
i
n
dica
t
io
nv
i
sua
l
i
n
di
cator, 0° to 95
°
(
0°
i
s spr
i
ng return pos
i
t
i
on
)
M
anua
l
overr
id
e 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 tem
p
erature
-
22 to 122° F (-30 to 50°
C
)
S
torage temperatur
e
-
40 to 176° F (-40 to 80°
C
)
H
ous
i
n
g
NEMA
2,
IP
54,
E
nc
l
osure
T
ype
2
Housin
g
material zinc coated metal and plastic casin
g
N
o
i
se
l
eve
l
≤
40dB
(
A
)
motor
@
150 seconds, run time dependen
t
≤62
dB(A)
spr
i
ng return
Agency listings
† cULus acc. to UL60730-1A
/
-2-14,
C
AN
/CS
A E60730-
1
:02, CE acc. to 2004/108/EC & 2006/95/EC
Quality standard ISO 9001
Servicin
g
ma
int
e
n
a
n
ce
fr
ee
Weigh
t
4.6 lbs. (1.9 kg), 4.9 lbs. (2 kg) with switc
h
*
Variable when configured with MFT option
s
†
Rated Impulse Voltage 800V, Type of action 1.AA (1.AA.B for -
S
version),
C
ontrol Pollution Degree 3.
Pro
g
rammed
f
or 70 sec motor run time. At 150 sec motor run time, trans
f
ormer sizin
g
is 8.5 VA and power consumption is 6 W running / 3 W holding.
i
K7-2 (supplied)
1/2" Centered
(Default)
3/4" Centered
(Field Selectable)
1.05" Centered
(Field Selectable)
A
FB24-MFT-
S
, AFX24-MFT-
S
Auxiliary switches 2 x
S
PDT 3A
(
0.5A
)
@
250 VA
C
, UL approve
d
one set at +10°, one adjustable 10° to 90°
N40103 - 09/11 - Subject to change. © Belimo Aircontrols (USA), Inc
.