2
Installation method
Installation methods of the speed controller are shown below. After connecting a power
supply and fan to the speed controller, attach the wiring cover before use.
Attaching the wiring cover
Wiring cover
Speed
controller
Groove
Tab
As shown in the figure, put the tab of the
wiring cover into the groove of the speed
controller until making a clicking sound.
When removing the wiring cover from the
speed controller, pull out while pressing the
tab of the wiring cover.
The speed controller cannot be installed to
a panel in a state where the wiring cover is
attached.
z
When installing to a panel
Install the speed controller to a flat panel offering excellent vibration resistance.
Applicable thickness of panel: 2.0 to 3.0 mm (0.08 to 0.12 in.)
Panel
Speed
controller
Wiring cover
1.
Assemble the speed controller to a
panel.
2.
Attach the wiring cover to the speed
controller.
Check if the speed controller is properly
installed to the panel.
Panel cut-out
[Unit: mm (in.)]
4×R2 or less
+0.6
0
34.2
(1.35
)
+0.024
0
+0.5
0
64.5 (2.54
)
+0.02
0
z
When installing to a DIN rail
Use a DIN rail 35 mm (1.38 in.) wide to install the speed controller.
Pull down the DIN lever of the speed controller, and push in the speed controller with
hanging the hook at the rear to the DIN rail, and then lift the DIN lever.
After installation, secure the both sides of the speed controller with the end plate that the
customer provides.
Hook
DIN rail
DIN lever
End plate
Removing from DIN rail
Pull the DIN lever down using a screwdriver or the like, and
lift the bottom of the speed controller to remove it from the
rail.
Use force of about 10 to 20 N (2.2 to 4.5 lb.) to pull the DIN
lever down.
Excessive force may damage the DIN lever.
z
When installing with screws
Secure the wiring cover using the mounting holes with two
screws (M4: not included) in a state of removing the speed
controller.
Tightening torque: 0.7 N·m (6.1 lb-in)
Install the speed controller after securing the wiring cover.
Use screws and washers, which sizes are Ø10 mm (0.39 in.) or
less, to secure the lever.
53.5 mm (2.11 in.)
Mounting
holes
Lever
Note
Check periodically if any of the tightened screws come loose.
Re-tighten if the screw was loose.
Connection
Note
Check the specification of the power supply voltage before applying the
voltage. Applying a voltage exceeding the rated range may damage the
product.
Connection method
GND
24 V
GND
ALM
GND
1
2
3
4
5
6
24 VDC
-10 to
+
15%
（
21.6 to 27.6 V
）
Speed controller
Red
Black
Brown
Yellow
Connection of fan
Alarm
signal
output
TB1
TB2 FAN
1
2
3
4
Check the specifications and number of fans connected, and use a power supply having
a suitable capacity.
Use crimp terminals to connect fans of
MDV420
,
MDV515
,
MDV625
,
MDV825
and
MDV925
.
The maximum extension distance between the speed controller and fan is 2 m (6.6 ft.).
External DC power
supply
M0
Speed
switching
input
Connecting the TB1
Pin assignment
9
*1'
0
*1'
$/0
*1'
Pin No. Terminal
name
Function
Description
1
24 V
Power supply
input
Connects a 24 VDC power supply.
2
GND
3
M0
Speed
switching input
The fan speed can be switched
between the rotation speed being set
and the maximum speed.
ON: Maximum speed
OFF: Setting speed
4
GND
5
ALM
Alarm signal
output
This signal is output if an alarm is
generated. (Normally closed)
6
GND
z
Internal configurations of circuit for speed switching input
The input signal circuit of the speed controller is C-MOS input.
GND
+5 V
200
M0
C-MOS
Speed controller
internal circuit
0 V
Open
collector
R
GND
+5 V
200
C-MOS
Speed controller
internal circuit
0 V
M0
Switch
●
In the case of open-collector output
●
In the case of connecting a switch
R
C
C
0 V
•
Status of signal
ON: 0 to 1 V (L level) PWM output 100% fixed
OFF: 4 to 5 V (H level) PWM output variable
•
Open circuit voltage 5 Vtyp
•
Outflow current: 20 to 30 mA
z
Internal configurations of circuit for alarm signal output
The output signal circuit of the speed controller is open-collector output.
If a current significantly exceeding the specification is generated, the internal transistor is
turned OFF.
Speed controller
User's circuit
R
27.6 VDC
or less
0 V
GND
R: Limiting resistor
ALM
30 mA
or less
0 V
•
Status of signal
When a fan rotates:
Internal transistor ON
When an alarm is generated
(when a fan stops):
Internal transistor OFF
•
Maximum applied voltage:
27.6 VDC or less
•
Maximum inflow current:
30 mA or less
•
ON voltage: 1.5 VDC or less
