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ExMax-...-Y
Special options
Important information for installation and operation
Actuators are maintenance free. An annual inspection is recommended. For electrical
installations inspection and maintenance, EN/ IEC 60079-17 can be used. Ex-actua-
tors must not be opened by the customer.
B. Manual override
Manual override only if supply voltage is cut. Use delivered socket wrench with slow
motions, usage can be tight. Attention: Releasing or letting go the Allen key too fast
at manual operating actuators with spring return causes risk of injury !
C. Shaft connection, selection of running time
Actuators are equipped with a direct coupling double square shaft connection of
12 × 12 mm. For round shafts adaptors/clamping connection (accessories, e.g. KB-S)
are available. The housing of the actuator is axially symmetrically built to select Open-close
direction of the spring return function by left-right mounting. Using the 10-position switch
different motor running times and spring return running times can be selected on site
in acc. to the actuator type.
D. 3-position control mode
...Max actuators are in the best way suitable for the 3-pos. operation. To protect such
elements as gears and mounting elements against harmful influences like minimum
pulse time, ...Max actuators are protected via internal electronics. It ignores impulses
< 0.5 s, the cyclic duration must be min. 0.5 s. At changing direction the pause is 1 s.
E. Spring return
Spring return function works only if the supply voltage for terminal 1 or 2 is cut. In the
event of an electrical interruption, the spring returns to its end position even if supply
voltage is available again during return function. Thereafter operation will continue.
F. Operation at ambient temperatures below −20 °C
All actuators are equipped with a regulated integrated heating device designed for
employments down to −40 °C ambient temperature. The heater will be supplied
automatically by connecting the constant voltage supply on the clamps 1 and 2.
1. After mounting the actuator must bei immediately electrically connected.
2. The heater switches on automatically when actuator reaches internally −20 °C. It
heats up the actuator to a proper working temperature, then heater switches off auto-
matically. Actuator will not run during heating process.
3. The adjustment options are only ensured after this heating up period.
G. Excess temperatures
In acc. to the ATEX rules and regulations Ex actuators must be protected against excess
temperature. The internal thermostat works as a maximum limiter and, in the event of
failure at incorrect temperatures, shuts off the actuator irreversible. An upstream
connected temperature sensor stops the actuator before reaching its max. temperature.
This safety feature is reversible, after cooling down the actuator is completely functional
again. In this case the failure must be eliminated immediately on site !
H. Synchron mode
Do not connect several actuators to one shaft or link mechanically together.
I. Mechanical protection
Actuators must be operated with a minimum external load.
After installing the actuator to the damper /armature a self adjustment drive has to be
performed in order to protect the damper/ armature against mechanical overload.
During operation the actuator reduces briefly its speed (motor power) before reaching
the end position for a "gentle" blockade/stop.
J. Intrinsically safe circuits
The actuator has a flameproof enclosure acc. to EN 60079. The supply of the push
button (adjustment drive), the 10-position switch (adjustment of torque and running
time) and the LED indicator is performed intrinsically safe !
Extra information (see additional data sheet)
Additional technical information, dimensions, installation instruction, illustration
and failure indication
Schischek GmbH Germany, Muehlsteig 45, Gewerbegebiet Sued 5, 90579 Langenzenn, Tel. +49 9101 9081-0, Fax +49 9101 9081-77, E-Mail info-de@schischek.com
ExMax-...-YF
... -CTS
... -VAS
www.schischek.com
E X P L O S I O N P R O O F
Parameters, adjustments and failure indication
Switch – Push button – Lamp
for adjustment
(behind the blanking plug)
10-position switch (S)
Push button (T)
3-colour LED
Parameter selection
Type
Example:
ExMax- 5.10-Y ►
ExMax-15.30-Y
ExMax- 15.30-Y ►
ExMax- 5.10-YF ►
Requested parameter:
ExMax-
Torque
30 Nm
Motor running time 30 s / 90°
Running times
7,5 s/90°
Result:
15 s/90°
Switch position 07
30 s /90°
60 s/90°
120 s/90°
Functions, adjustments and parameters
A) Self adjustment of angle of rotation
Turn switch (S) to position 02 (low torque) or 07 (high torque). Press button (T) for
a minimum of 3 seconds. The actuator drives to both end positions and detects the
blocking positions. The LED flashes GREEN during adjustment.
The adjustment takes about 60 seconds (30 sec. "On", 30 sec. "Off").
B) Selecting motor running time and torque
Adjust parameters only if actuator is in idle state or without applied potential.
Turn switch (S) to the position required for the intended operation acc. to table
above. The selected parameters will be carried out at the actuator's next operation.
C) Selecting spring return time
Spring return time is selected by wiring.
D) Changing modulating operation to 3-pos. operation with feedback
Modulating mode: The LED lights GREEN, potential applied.
Press button (T) briefly 3 times:
▪ each for at least 0.2 seconds
▪ altogether within max. 5 seconds
The LED changes from steady GREEN to steady YELLOW*.
E) Changing 3-pos. operation with feedback to modulating operation
3-pos. mode: The LED lights YELLOW*, potential applied.
Press button (T) briefly 3 times.
The LED changes from steady YELLOW* to steady GREEN.
F) Additional information for control in 3-pos. operation with feedback
a closed, b open
= direction I
b closed, a open
= direction II
The rotation direction (I and II) depends on left / right mounting of the actuator to the
damper. To reverse the rotation direction (by motor) exchange the electrical wiring
of terminal 3 and 4.
In 3-pos. operation with feedback the Y-inputs are without function.
G) Inverting <=> Reverting
Bridging signal wires 3 –4 (cable B) inverts the function of input signals Y and feed-
back signals U.
* Note: "YELLOW" may vary from yellowish to orange.
!
Attention
During commissioning apply a self adjustment drive.
Regard duty cycle at motor running times !
Never use spring return actuators without external load.
S
T
Torques
5 Nm
10 Nm
15 Nm
30 Nm
5 Nm
10 Nm
.15-YF ►
15 Nm
▼
▼
Position of switch (S)
►
00
05
►
01
06
07
►
02
►
03
08
►
04
09
a and b closed
= motor doesn't work
a and b open
= motor doesn't work
!
ExMax-S-Y_en
V01 – 16-Nov-2017
4 / 4
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