Sentera Controls SDX-DM Series, Mounting And Operating Instructions

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MIW-SDX-DM-EN-000 - 17 / 06 / 2021 5 - 8
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SDX-DM
ELECTRONIC FAN SPEED
CONTROLLER
► EN 61000-3-2:2014 Electromagnetic compatibility (EMC) – Part 3-2: Limits -
Limits for harmonic current emissions (equipment input current ≤ 16 A per phase)
■
WEEE Directive 2012/19/EU
■
RoHs Directive 2011/65/EU
OPERATIONAL DIAGRAMS
Low to high speed with soft start Low to high speed with kick start
Uout [%]
Min. Max.
Off
Switch
On
0
Potentiometer position
Umax
Umin
Uout [%]
Min. Max.
Off
Switch
On
0
Potentiometer position
Umax
Umin
Kickstart
2—20 s
High to low speed with soft start High to low speed with kick start
Uout [%]
Min.
Max.
Off
Switch
On
0
Potentiometer position
Umax
Umin
Uout [%]
Min.
Max.
Off
Switch
On
0
Potentiometer position
Umax
Umin
Kickstart
2—20 s
NOTE
By default, the desired fan speed or output value is set via the built-in potentiometer.
It is possible to overrule the built-in potentiometer via Modbus RTU communication.
Output overwrite can be enabled via Modbus Holding register 12. When output
overwrite is enabled, the desired output value can be written in Modbus Holding
register 13. In that case it is advisable also to activate Modbus safety timeout
by writing a value different from 0 in Holding register 8. After the time out period
elapses, the output is forced to the minimum output value. If timeout is set to zero,
this function is disabled.
ATTENTION
Overheating protection is activated when an excessive load is connected to the
output or in case the ambient temperature exceeds the maximum allowed operating
temperature. When overheating protection is activated, the output is disabled and
overheat condition is indicated in Modbus input register 10. When the overheating
condition is removed, the device automatically resumes operation.
WIRING AND CONNECTIONS
A
Modbus RTU communication, signals A and /B
/B
L
Power supply, line (230 VAC ±10 % / 50—60 Hz)
N Power supply, neutral
U2
Regulated output to motor, neutral
U1 Regulated output to motor, line
Connections Spring contact terminal block, cable cross section: 1,5 mm
2
; pitch 5 mm
Umax from
75—100 % Us
Umin from
20—70 % Us
Umax from
75—100 % Us
Umax from
75—100 % Us
Umax from
75—100 % Us
Umin from
20—70 % Us
Umin from
20—70 % Us
Umin from
20—70 % Us