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07/27/2017
1 of 6
SERIES:
CFM-120
│
DESCRIPTION:
DC AXIAL FAN
FEATURES
• 120 x 120 mm frame
• high fan speed for greater air flow
• dual ball bearing construction
• auto restart protection standard on all models
MODEL
rated
(Vdc)
input
voltage
range
(Vdc)
typ
(A)
input
current
max
(A)
input
power
max
(W)
rated
speed
typ
(RPM)
air
flow
1
(CFM)
static
pressure
2
(inch H
2
O)
noise
max
(dBA)
CFM-A225-13
CFM-A225-23
CFM-A225-43
CFM-A238-13
CFM-A238-23
CFM-A238-43
Notes:
12
24
48
12
24
48
6~13.8
16~27.6
30~55.2
6~13.8
16~27.6
30~55.2
0.59
0.31
0.17
1.40
0.77
0.36
0.79
0.39
0.23
1.75
0.88
0.48
9.48
9.36
11.04
21
21.12
23.04
4,100
4,100
4,100
4,600
4,600
4,600
126.89
126.89
126.89
200.9
200.9
200.9
0.49
0.49
0.49
0.78
0.78
0.78
53.5
53.5
53.5
61.5
61.5
61.5
1. At 0 inch H
2
0 static pressure.
2. At 0 CFM airflow.
PART NUMBER KEY
CFM-A2
XX
-
X
3 -
XX
-
CXX
Base Number
Depth
25 = 25 mm
38 = 38 mm
Reserved for Custom
Configurations
Input Voltage
1 = 12 Vdc
2 = 24 Vdc
4 = 48 Vdc
Fan Signals
10 = no signals
11 = rotation detector signal
20 = tachometer signal
22 = tachometer signal / PWM control signal
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SERIES:
CFM-120
│
DESCRIPTION:
DC AXIAL FAN
date
07/27/2017
│
page
2 of 6
INPUT
parameter
operating input voltage
conditions/description
12 Vdc input models
24 Vdc input models
48 Vdc input models
CFM-A225-13
CFM-A225-23
CFM-A225-43
CFM-A238-13
CFM-A238-23
CFM-A238-43
CFM-A225-13
CFM-A225-23
CFM-A225-43
CFM-A238-13
CFM-A238-23
CFM-A238-43
at 25°C
12 Vdc input models
24 Vdc input models
48 Vdc input models
min
6
16
30
typ
12
24
48
0.59
0.31
0.17
1.40
0.77
0.36
7.08
7.44
8.16
16.80
18.48
17.28
6
12
24
max
13.8
27.6
55.2
0.79
0.39
0.23
1.75
0.88
0.48
9.48
9.36
11.04
21
21.12
23.04
units
Vdc
Vdc
Vdc
A
A
A
A
A
A
W
W
W
W
W
W
Vdc
Vdc
Vdc
current
power
starting voltage
PERFORMANCE
parameter
rated speed
conditions/description
at 25°C, after 10 minutes
CFM-A225 models
CFM-A238 models
at 0 inch H
2
O, see performance curves
CFM-A225 models
CFM-A238 models
at 0 CFM, see performance curves
CFM-A225 models
CFM-A238 models
at 1 m
CFM-A225 models
CFM-A238 models
min
3,690
4,140
typ
4,100
4,600
126.89
200.9
0.49
0.78
51.5
59.5
53.5
61.5
max
4,510
5,060
units
RPM
RPM
CFM
CFM
inch H
2
O
inch H
2
O
dBA
dBA
air flow
static pressure
noise
PROTECTIONS / SIGNALS
1
parameter
auto restart protection
rotation detector
tachometer signal
PWM control signal
Notes:
conditions/description
available on all models
available on “11” models
available on “20” and “22” models
available on “22” models
min
typ
max
units
1. See application notes for details.
SAFETY & COMPLIANCE
parameter
insulation resistance of frame
dielectric strength
safety approvals
EMI/EMC
life expectancy
RoHS
conditions/description
at 500 Vdc between frame and positive terminal
at 500 Vac, 60 Hz, 1 minute between frame and
positive terminal
UL/cUL 507, TUV (EN 60950-1)
EN 55022:2010+AC:2011 Class B, EN 61000-3-
2:2014, EN 61000-3-3:2013, EN 55024:2010
at 45°C, 15~65% RH
2011/65/EU
70,000
hours
min
10
5
typ
max
units
MΩ
mA
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│
SERIES:
CFM-120
│
DESCRIPTION:
DC AXIAL FAN
date
07/27/2017
│
page
3 of 6
ENVIRONMENTAL
parameter
operating temperature
storage temperature
operating humidity
storage humidity
non-condensing
non-condensing
conditions/description
min
-10
-40
5
5
typ
max
70
70
90
95
units
°C
°C
%
%
PERFORMANCE CURVES
CFM-A225
(Inch H2O)
CFM-A238
0.50
14.00
12.00
10.00
(mm H2O)
0.98
.
0.40
.
0.30
8.00
6.00
4.00
.
0.20
10.
0.10
2.00
0.00
0.00
.
0.00
0.00
50.00
100.00
150.00 (CFM)
(CMM)
0.
0.
.
100.
.
.
.
0.00
0.74
1.49
2.23
2.98
3.72
0.00
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SERIES:
CFM-120
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DESCRIPTION:
DC AXIAL FAN
date
07/27/2017
│
page
4 of 6
MECHANICAL
parameter
motor
bearing system
direction of rotation
dimensions
material
conditions/description
4 pole DC brushless
ball bearing
counter-clockwise viewed from front of fan blade
CFM-A225 models 120 x 120 x 25.4
CFM-A238 models 120 x 120 x 38
PBT (UL94V-0)
CFM-A225-13
CFM-A225-23
CFM-A225-43
CFM-A238-13
CFM-A238-23
CFM-A238-43
190.0
189.8
190.6
297.0
283.7
283.2
g
g
g
g
g
g
mm
mm
min
typ
max
units
weight
MECHANICAL DRAWING
units: mm [inch]
CFM-A225
wire: UL 1007, 24 AWG
WIRE CONNECTIONS
Wire Color
Red
Black
Yellow
1
White
1
Blue
1
Function
+Vin
-Vin
FG Signal
RD Signal
PWM
CFM-A238
wire: UL 1007, 24 AWG
WIRE CONNECTIONS
Wire Color
Red
Black
Yellow
1
White
1
Blue
1
Function
+Vin
-Vin
FG Signal
RD Signal
PWM
Note:
1. Wires only present on versions with output signals.
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CUI Inc
│
SERIES:
CFM-120
│
DESCRIPTION:
DC AXIAL FAN
date
07/27/2017
│
page
5 of 6
APPLICATION NOTES
Auto Restart Protection/Current Limit Protection
When the fan motor is locked, the device will cut off the drive current within two to six seconds and restart automatically
after a few seconds. If the lock situation is continued, the device will work on a repeated cycle of cut-off and restart until
the lock is released. (See Figure 1 below).
Figure 1 Current Limit Protection
Lock Sensor/Rotation Detector
Lock Sensor is used to detect if the fan motor is operating or stopped. Alarm High: the output will be logical low when fan
is operating and be logical high when fan motor is locked. (See Figures 2~3 below).
Figure 2 Alarm High
Output Waveform
Figure 3 RD Signal Output Circuit:
Open Collector
Ic=5mA max
Pulse Sensor/Tachometer Signal/FG
Pulse Sensor is for detecting the rotational speed of the fan motor. At locked rotor condition, the signal stops cycling and
the output is fixed at VoH or VoL
(See Figures 4~5 below).
Figure 4 Output Waveform
Figure 5 FG Signal Output Circuit:
Open Collector
Ic=10mA max
PMW Control Signal
A speed control lead can be provided that will accept a PWM signal from the customer circuit to vary the speed of the fan.
The change in speed is linear by changing the Duty-Cycle of the PWM. Open collector type and pull-up voltage is changed
by maximum operating voltage and sink current by consuming current. (See Figure 6 below).
Figure 6 Duty Cycle
Vs=4~5 V
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