
Preparation
Upon opening the package, verify that the items listed below are
included. Report any missing or damaged items to the branch or
sales office from which you purchased the product.
• Fan .....................................................................1 pc.
• OPERATING MANUAL (this manual) .................1 copy
Accessories for fan kit products
• Finger guard .......................................................1 pc.
• Set of mounting screws for finger guard .............1 set
Installation
Location for installation
The fan is designed and manufactured for installation in equipment.
Install it in a well-ventilated location that provides easy access for
inspection. The location must also satisfy the following conditions:
• Inside an enclosure that is installed indoors (provide vent holes)
• Operating ambient temperature
−10 to +60 °C (+14 to +140 °F) (non-freezing)
• Operating ambient humidity 85% or less (non-condensing)
• Area that is free of explosive atmosphere or toxic gas (such as
sulfuric gas) or liquid
• Area not exposed to direct sun
• Area free of excessive amount of dust, iron particles or the like
• Area not subject to splashing water (rains, water droplets), oil (oil
droplets) or other liquids
• Area not subject to continuous vibration or excessive shocks
• Area free of radioactive materials, magnetic fields or vacuum
• Area free of excessive electromagnetic noise (from welders,
power machinery, etc.)
When using near a switching circuit or high-frequency power
supply, the induced current may flow inside the fan due to
electromagnetic noise (conductive noise, radiative noise). If the
induced current flows, the electric corrosion is caused in the
bearings of the fan. As a result, it may generate the noise or
shorten the service life of the products. Use the fan in the
environment that the electromagnetic noise does not cause.
How to install the fan
Install the fan onto an appropriate flat metal plate having excellent
vibration resistance and heat conductivity.
Drill holes on the mounting plate and fix the fun on the plate using
screws (not supplied).
For air orientation and rotational direction, see the indications
shown on the fan’s side frame.
Mounting screw
Screw size Tightening torque
M4 0.6 N·m (5.3 lb-in)
Connection and operation
This fan motor has 4 lead wires (color: red, black, brown, yellow).
Connect the lead wires as follows.
Wiring diagram
Red
Black 24 VDC
GND
Brown PWM signal
Yellow Pulse output
+
Connecting the speed control line
The rotating speed varies in response to the duty cycle of the input
pulse signal. As the duty cycle increases, the rotating speed is
faster and air flow-static pressure is larger.
Use the PWM signal at the following conditions.
Frequency: 25 kHz
Voltage: 5.25 VDC or less
Duty cycle: 0 to 100%
PWM signal Brown
Black
I source
Fan
I sink
R
R
0 V
PWM Input Signal : TTL Input, Open Collector Input,
Open Drain Input
Source Current (I source) < 1 mA (at the time of inputting PWM
Signal to VL)
Sink Current (I sink)∗< 1 mA (at the time of inputting PWM Signal
to VH)
∗ For MDV1238, Sink Current (I Sink) < 3 mA
Connection of the alarm
Pulse sensor
The yellow wire is lead wire for the pulse output. GND is common
to the sensor and power supply.
Two cycles of rectangular waves are output per rotation.
Yellow
Black
Fan
Client's circuit
R
10 mA or
less
GND
30 VDC or less
0 V
Overheat protection
The fan is equipped with an internal protective circuit against
overheating. In the event a lock-up condition is detected, this
function automatically controls the current flow to the fan motor’s
windings, thus preventing the fan blades from locking and burning
out. The fan resumes operation automatically as soon as it is
released from the locked condition. Be sure to shut off the power to
the fan before performing an inspection.
• Unauthorized reproduction or copying of all or part of this
manual is prohibited.
• Characteristics, specifications and dimensions are subject to
change without notice.
• and are registered trademarks or
trademarks of Oriental Motor Co., Ltd., in Japan and other
countries.
© Copyright ORIENTAL MOTOR CO., LTD. 2012
• Please contact your nearest Oriental Motor office for further information.
Technical Support Tel:(800)468-3982
8:30
A.M.
to 5:00
P.M.
, P.S.T. (M-F)
7:30
A.M.
to 5:00
P.M.
, C.S.T. (M-F)
E-mail: techsupport@orientalmotor.com
www.orientalmotor.com
Headquarters and Düsseldorf Office
Tel:0211-52067-00 Fax:0211-52067-099
Munich Office
Tel:089-3181225-00 Fax:089-3181225-25
Hamburg Office
Tel:040-76910443 Fax:040-76910445
Tel:01256-347090 Fax:01256-347099
Tel:01 47 86 97 50 Fax:01 47 82 45 16
Tel:02-93906346 Fax:02-93906348
Tel:(02)8228-0707 Fax:(02)8228-0708
Tel:+65-6745-7344 Fax:+65-6745-9405
Tel:(03)22875778 Fax:(03)22875528
KOREA
Tel:080-777-2042 Fax:02-2026-5495
Headquarters Tokyo, Japan
Tel:03-6744-0361 Fax:03-5826-2576
Tel:+66-2-251-1871 Fax:+66-2-251-1872
Tel:400-820-6516 Fax:021-6278-0269