ZPA Pečky MODACT MON User manual

Electric Multi-turn
Actuators
4/16
MOUNTING INSTRUCTIONS
Type numbers 52 030 - 52 036
Type numbers 52 030 - 52 032
Type numbers 52 030 - 52 036
Type numbers 52 030 - 52 032
Actuators
Type numbers 52 030 - 52 036

3
1. APPLICATION
MODACT MON, MOP, MONJ series actuators are intended for actuating valves or other appliances suitable for
control using actuators’ rotary reverse movement. Other application than for operating valves must be consulted with
manufacturer. Actuators may work in remote-controlled circuits. Actuators fitted with current transmitter may also work in
automatic control circuits in S4 – 25%; 1,200 h -1 operating mode.
Depending on the relevant version, MODACT MON, MOP, MONJ Control actuators may be fitted with position
regulator, reversing contactors, electric motor current protection, and electronic brake. Control elements, working in
regulating circuits, can be set depending on the analogue input signal value of position regulator. They can be also
delivered only with reversing contactors, or with reversing contactors and electronic brake.
2. WORKING ENVIRONMENT, OPERATING POSITION
Working environment
MODACT MON, MOP, MONJ actuators are resistant to operating conditions and external impact classes AC1, AD5,
AD7, AE4, AE6, AF2, AG2, AH2, AK2, AL2, AM-2-2, AN2, AP3, BA4 and BC3 pursuant to ČSN 33 2000-5-51 ed 3.
When located in outdoor areas, we recommend you to provide a light shelter to prevent direct impact of atmospheric
conditions. The shelter should overreach the actuator’s ground plan by at least 10 cm at the level of 20 to 30 cm.
When actuators are located in a working environment with temperatures below +10°C, with relative humidity exceeding
80%, below a shelter, or in tropical areas, it is always necessary to use thermal element that is mounted to all actuators.
Actuators can be applied in premises with inflammable and non-conductive dust unless such environment
adversely influences the electric motor’s function. In such case, the CSN 34 3205 standard must be consequently
adhered to. Dust should be wiped off when the dust layer thickness reaches about 1 mm.
Notes:
Sheltered areas are considered those where the fall of atmospheric precipitations under the angle up to 60° from
vertical axis is prevented.
Electric motor must be located in areas providing free access of cooling air so that warm air blown out is not
re-aspired by the electric motor. Minimum distance from wall for fresh air access is 40 mm. The area where the electric
motor is located must be sufficiently large, clean and ventilated.
Ambient temperatures
MON, MON Control actuators are fabricated for ambient temperatures from -25 °C to +70 °C, from -40 °C to +60 °C
or from -60 °C to +60 °C.
MOP actuators are fabricated for ambient temperatures from -25 °C to +60 °C.
MONJ actuators are fabricated for ambient temperatures reaching from -25 °C to +70 °C.
Relative humidity from 10 % to 100 % with condensation.
External impact classes
Basic characteristics – extract from ČSN 33 2000-5-51 ed 3
1) AC1 – above-sea level ≤ 2000 m
2) AD5 – spouting water; water may spout in all directions
AD7 – shallow immersion, possible sporadic partial or full coverage (only for MOP)
3) AE4 – light dust formation
AE6 – strong dust formation (only for MOP)
4) AF2 – occurrence of corrosive or polluting agents is atmospheric; presence of corrosive pollutants is significant
5) AG2 – mean mechanical strain; in normal industrial operations
6) AH2 – mean vibrations; in normal industrial operations
7) AK2 – serious risk of plant and moulds growth
8) AL2 – serious risk of occurrence of animals (insects, birds, small animals)
9) AM-2-2 – normal level of signal voltage. No additional requirements.
10) AN2 – mean solar radiation. Intensity > 500 and ≤ 700 W / m2
11) AP3 – mean seismic impacts; acceleration > 300 Gal ≤ 600 Gal
12) BA4 – capability of persons; instructed persons
13) BC3 – frequent contact of persons with ground potential; persons often touch foreign conductive parts or stand
on conductive substrate

4
Operating position
MODACT® MON, MOP, MONJ actuators filled with grease can be operated in any position. Actuators with grease
are identified with label stating “Filled with grease”, located on the power box on the hand wheel side.
Working position of actuators with oil filling is limited only by the inclination of electric motor axis – max. 15° below
horizontal line. This prevents possible clippings and impurities in oil bath from reducing the service life of electric motor
shaft seal.
In case of installation with electric motor above horizontal level, oil bath must be supplemented so as to secure
rmotor pinion’s reliable lubrication.
Actuators with oil bath are not identified by any label.
3. OPERATING MODE, ACTUATOR SERVICE LIFE
Operating mode
Actuators can operate with S2 load type as per ČSN EN 60 034-1; see course of load on diagram below. Period
of operation at +50 °C is 10 minutes and mean load torque value is maximally 60 percent of the maximum tripping
torque value.
Actuators may also work in interrupted operating mode with S4 start-up as per ČSN EN 60 034-1 (e.g. in case of
gradual valve opening action etc.). Maximum number of switching actions at automatic regulation is 1,200 cycles
per hour with a load factor of 25 % (proportion of operating period to rest period 1:3). Mean load torque value
equals maximally to 40 percent of the maximum tripping torque. Longest operating cycle (N+R) is 10 minutes; load
factor (N/N+R) is maximally 25 %.
Maximum mean value of load torque equals to rated torque of actuator.
Actuators service life
Actuator intended for closing valves must be able to execute at least 10,000 operating cycles (Close - Open - Close).
Actuator intended for regulation purposes must execute at least 1 million cycles with operating period of (with
input shaft in motion) at least 250 hours. Service life in operating hours (h) depends on load and number of
switching operations. High frequency of switching operations may have a negative impact on regulation accuracy.
To achieve the longest possible fault-free service life, we recommend you to set switching frequency to the lowest
possible number necessary for the relevant process. Reference information on service life, derived from set-up
regulation parameters, is specified in the table below.
Actuators service life for 1 million starts
service life [h] 830 1,000 2,000 4,000
number of starts maximum number of 1,000 500 250
[1/h] starts1,200
Operating period N Resting period R
Cycle time
Mz breakaway torque ≥ 1.3 Mv
Mstř mean value of load torque
Mv maximum value of tripping torque
Operating cycle course

4. TECHNICAL SPECIFICATIONS
Feeding voltage
Actuators feeding voltage: MODACT MON, MOP: 3 x 230 / 400 V, +10 %, -15 %, 50 Hz, ±2 %
3 x 220 / 380 V, +10 %, -15 %, 50 Hz +3 % -5 %
MODACT MONJ: 1 x 230 V, +10 %, -15 %, 50 Hz, ±2 %
1 x 220 V, +10 %, -15 %, 50 Hz +3 % -5 %
Upon agreement with supplier, actuators can be supplied also to comply with another feeding voltage and
frequency. More details can be found in Technical Conditions.
Ingress protection
Ingress protection of actuators: MODACT MON, (MODACT MON Control), MODACT MONJ – IP 55
MODACT MOP (MODACT MOP Control) – IP 67
Noise
Sound pressure level A max. 85 dB (A)
Sound power level A max. 95 dB (A)
Tripping torque
Tripping torque is set up by manufacturer as per customer’s requirement pursuant to Version Table 1 or 2. If tripping
torque adjustment is not required, maximum value of tripping torque is set up.
Breakaway torque
Breakaway torque is a calculated value, determined by electric motor’s breakaway torque, actuator's total ratio and
effectiveness. Actuator can produce breakaway torque after run reversing operation for 1 to 2 revolutions of the output shaft,
while torque tripping is interlocked. This may occur either in end position or in any optional intermediate position.
Self-locking function
Actuator is self-locking provided that load acts against the motion of the actuator's output shaft. Self-locking function
is provided by a roller lock, which immobilizes actuator’s rotor even in case of manual operation.
With respect to safety regulations, it is unacceptable to apply actuators for operating transport lifting equipment with
possible transport of persons, or for equipment where persons may be present below the lifted load.
Rotation direction
When looking at the input shaft from the control box, “closing” direction is equal to clockwise rotation direction.
Working stroke
Working stroke is specified in Table 1 or 2.
Raising spindle
Actuators with A and C-shape installation dimensions can be adjusted to install actuator on valve with raising spindle, which
overreaches the top end of the actuator output shaft in the valve’s end position. Room for raising spindle of valve is obvious from
dimensional sketches. When necessary, operator may install a protective cylindrical cover for raising spindle, replacing the cover
of openings in the control box. Protective cover for raising spindle is not included in the scope of actuator delivery.
Manual operation
Manual operation is carried out by hand wheel directly (without clutch) and can take place also while the electric
motor is running (output shaft motion is determined by the differential gear’s function). When rotating the hand wheel
in clockwise direction, the actuator’s output shaft also rotates in clockwise direction (looking at the shaft into the control
box). If the valve nut has a left-hand thread, the actuator will close the valve.
Torque values in actuators are set up and work if the actuator is energized.
If manual operation is used i.e. if actuator is operated mechanically, the torque set up will not work and valve
may be damaged.
5

6
5. ACTUATOR FEATURES
Torque switches
Actuators are fitted with two torque switches (MO, MZ), each for one direction of actuator output shaft motion.
Torque switches may work in any point of the operating stroke except where they are interlocked (Breakaway torque).
Tripping torque value can be set up within the range specified in Table 1 or 2. Torque switches are interlocked in
the event that once switched off they lose load torque. This provides protection of actuator against so-called “pulsing”.
Position switches
Position switches PO, PZ delimit the working stroke of the actuator (one switch for each limit position).
Position signalling
Actuator’s output shaft position is signalled by two signal switches SO, SZ – each for one output shaft motion
direction. Switching point of micro switches can be set up in the entire range of working stroke, except a tight range
before micro switch tripping point, which deactivates the electric motor.
Position transmitters
Actuators MODACT MON, MOP, MONJ may be delivered without position transmitter or they can be provided with
position transmitter:
a) Resistance transmitter 2 x 100 Ω
Technical parameters:
Position sensing by resistance
Rotation angle 0° – 160°
Linearity ≤ 1 %
Contact resistance max. 1.4 Ω
Permissible voltage 50 V DC
Maximum current 100 mA
b) Passive current transmitter type CPT 1Az. Current loop feeding is not part of the actuator. Recommended feeding
voltage is 18 to 28 V DC, with maximum loop load resistance of 500 Ω. Current loop must be earthed in one point. Feeding
voltage does not need to be stabilized, however, it must not exceed 30 V, otherwise the transmitter may be destructed.
Range of CPT 1Az is adjusted using potentiometer on the transmitter’s body, and output value is adjusted by rotating
the transmitter accordingly.
Technical parameters of CPT 1Az:
Position sensing by capacity
Working stroke adjustable 0° – 40° to 0° – 120°
Non-linearity ≤ 1 %
Non-linearity including gears ≤ 2.5 % (for max.stroke 120°).
Hysteresis including gears ≤ 5 % (for max. stroke 120°)
(Non-linearity and hysteresis relate to signal value of 20 mA.)
Load resistance 0 – 500 Ω
Output signal 4 – 20 mA or 20 – 4 mA
Feeding voltage for Rz 0 – 100 Ω 10 – 20 V DC
for Rz 400 – 500 Ω 18 – 28 V DC
Maximum feeding voltage ripple 5 %
Maximum power input of transmitter 560 mW
Insulation resistance 20 MΩ at 50 V DC
Electrical resistance of insulation 50 V DC
Temperature of working environment -25 °C to +60 °C
Temperature of working environment – extended range -25 °C to +70 °C (other ranges upon request)
Dimensions ø 40 x 25 mm
c) Active current transmitter type DCPT. Current loop feeding is part of the actuator. Maximum load resistance of
loop is 500 Ω. For MODACT MON, MOP, MONJ Control versions with ZP2.RE5 regulator, the current transmitter is
used as position sensor.
DCPT is easy to adjust by means of two pushbuttons with LED on the transmitter body.

7
Technical parameters of DCPT:
Position sensing contactless, magnetoresistant
Working stroke adjustable from 60°to 340°
Non-linearity max. ±1 %
Load resistance 0 – 500 Ω
Output signal 4 – 20 mA, or 20 – 4 mA
Feeding 15 – 28 V DC, < 42 mA
Working temperature -25 °C to +70 °C
Dimensions ø 40 x 25 mm
Transmitters CPT 1Az and DCPT are connected by two-wires, i.e. transmitter, power supply and load are
connected in series. User must provide connection of two-wire circuit of current transmitter to ground of the
adjacent regulator, computer etc. Connection must be provided only in one point in any part of the circuit,
outside the electric actuator.
d) Resistance transmitter VISHAY 1 x 100 Ω. Resistance transmitter is used only in combination with regulator
ZP2RE6. It is utilized for higher thermal resistance and higher electric strength.
Technical parameters:
Position sensing by resistance
Scope of resistance 5 Ω to 40 kΩ
Angle of rotation 340° ±2°
Linearity ± 0.5 %
Contact resistance max. 0.5 Ω
Noise 100 Ω ENR
Minimum voltage 0.5 % max.
Insulation resistance 1,000 MΩ at 50 V DC
Dielectric strength 1,000 V RMS, 60 Hz
Transmitter power input 2 W (reduction to zero from 125 °C)
Working temperature -55 °C to +125 °C
Position indicator
Actuator can be equipped with local position indicator.
Heating element
Actuators are equipped with a heating element to prevent water vapour condensation. Heating element is to be
connected to 230 V power supply.
Local control
Local control serves to operate the actuator from the place of installation. Local control consists of two switches:
switch1 has positions: “remote control – off – local control”, switch 2: “opening – stop – closing”. Switch 1 can be
integrated as 2-pole or 4-pole switch. Switches are located in terminal box.
Position regulator
Position regulator, integrated in the actuator, enables the position of the actuator output shaft and thus also the
actuated fitting to be controlled by an input analogue signal.
The regulator’s basic component is a microcomputer, programmed to regulate the actuator, to identify and lever
error statuses and to easily set regulation parameters.
In case of power failure, the regulator will not regulate. Parameters and diagnostic data are written in
regulator memory, where they are stored. After power up, data will be automatically loaded from regulator
memory.
In the regulator’s circuits, input signal is compared with feedback signal from the position transmitter of the actuator
input shaft. If a discrepancy is found between the input and feedback signal, the regulator switches one of the integrated
contactors in the electric motor so that the actuator’s shaft is set to a position corresponding to the value of the input
signal. If the feedback signal corresponds to the input signal, the actuator will stop.
Regulation parameters are adjusted using function buttons on regulator or by means of a personal computer
connected to the regulator through communication module, while adjusting the parameters.

8
Dynamic brake
Brake is an optional equipment of MODACT MON, MOP Control actuators. Upon contactor disconnection, it incites
dynamic braking torque in the electric motor for several tenths of second. It significantly reduces rundown time and thus
makes regulation more precise. No braking torque is applied when actuator is stopped.
Autonomous brake BAM-002 is used for actuators without regulator. For its function, the brake needs supplementary
auxiliary contacts of contactors as well as an additional over-current relay contact. It is designed for electric motors
3 x 230 / 400 V with output up to 550 W.
For actuators with regulator ZP2.RE5, simpler controlled brakes BR2 are used. They are interconnected with
regulator that gives them actuation impulse.
The corresponding version is selected depending on the electric motor version:
BR2 550 up to the output of 550 W,
BR 2.2 up to the output of 2.2 kW.
If outputs higher than 2.2 kW need to be braked, special versions of electric motors with electromagnetic brake must be
applied.
Electric motor switching, contactor unit
Control versions of actuators have integrated reversing contactor combinations. These consist of two contactors and
an over-current relay. The combination also includes mechanical interlocking, which prevents both contactors from
switching at the same time. This could happen for instance as result of wrong connection of jumpers in the terminal box.
Interlocking is not designed for long-term function. Over-current relay protects the electric motor from overloading and is
designed according to its output.
Depending on the actuator version, contactors are controlled by regulator, local control switch or by external input.
Standard control voltage is 230 V/50 Hz and is transferred through contacts of position and/or torque micro switches.
Thus, these micro switches do not need to be led out of the actuator.
6. ELECTRICAL PARAMETERS
External electrical connection
a) Terminal board
Actuator is fitted with a terminal board providing connection to external circuits. Terminal board is provided with
screw terminals for connection of conductors with a maximum section of 4 mm2. Terminal board is accessible upon
removal of terminal box cover. All electrical control circuits of actuator are led to the terminal board. Terminal box is
provided with cable bushings for electric connection of actuator. Electric motor is provided with separate box including
terminal board and bushing.
b) Connector
Upon customer’s request, actuators MODACT MON, MOP, MONJ can be provided with a connector that enables
connection of control circuits. Connector is provided with crimp terminals for connection of conductors with a maximum section
of 4 mm2. ZPA Pečky, a.s. also supplies terminal counterpart for cable. Special crimping scissors are necessary for attaching
a cable to this counterpart.
Internal electrical connection of actuators
Internal electrical wiring diagrams of MODACT MON, MOP, MONJ actuators including identification of terminals
are included in the present Catalogue.
On the actuator, the internal wiring diagram is depicted on the inner side of the terminal box cover. Terminals are
identified by numbers on adhesive stickers attached on carrying belt below the terminal board.
Current-carrying capacity and maximum voltage of micro switches
Micro switches maximum voltage is 250 V AC and DC at the following maximum current values:
MO, MZ 250 V AC / 2 A; 250 V DC / 0,2 A
SO, SZ 250 V AC / 2 A; 250 V DC / 0,2 A
PO, PZ 250 V AC / 2 A; 250 V DC / 0,2 A

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Micro switches can be used only as single-circuit micro switches. Two voltages of varying values or phases must
not be connected to the terminals of one micro switches.
Insulation resistance
Insulation resistance of electrical circuits against the ground or against each other at normal conditions must be at
least 20 MΩ, after humidity test at least 2 MΩ. Insulation resistance of electric motor must be at least 1.9 MΩ. More
details can be found in Technical Conditions.
Electric strength of electrical circuits’ insulation
Circuit of position resistance transmitter 500 V, 50 Hz
Circuit of current transmitter 50 V DC
Circuits of micro switches and heat resistor 1,500 V, 50 Hz
Electric motor Un = 1 x 230 V 1,500 V, 50 Hz
Un = 3 x 230/400 V 1,800 V, 50 Hz
Deviations from basic parameters
Tripping torque ±12 % of maximum value of range
Setting speed - 10 % of maximum value of range
+15 % of rated value (in idle run)
Signal switches setting ± 2.5 % of maximum value of range
(ranges are specified in Installation Manual)
Signal switches hysteresis max. 4 % of maximum value of range
Position switches setting ± 25° of output shaft swivel angle (no run-out impact)
Position switches hysteresis max. 45° of output shaft swivel angle
Protection
Actuators are provided with one internal and one external protective terminal serving as protection from electric
shock as per CSN 33 2000-4-41 ed. 2. Also the electric motor is provided with one protective terminal. Protective
terminals are identified with a sign complying with ČSN EN 60 417-1 and 2 (013760).
If actuator is not provided with over-current protection when purchased, such protection must be provided
externally.
7. DESCRIPTION
Actuators with basic installation dimensions are designed for direct installation to valves. Connection of actuator with
valve is enabled by a flange complying with ČSN EN ISO 5210 (13 3090). To transfer the motion of the actuator’s output
shaft to the valve, actuators are provided with C or D-shape couplings as per ČSN 18 6314 (equivalent to DIN 3338),
or with E-shape couplings as per ČSN 18 6314; ČSN 18 6314; B3 as per ČSN EN ISO 5210 (13 3090). Using adapters,
supplied as an option, A or B1 shape installation dimensions as per ČSN EN ISO 5210 (13 3090) can be obtained.
Adapters are fitted between actuator and valve.
Description:
1 – electric motor
2 – counter gear set box
3 – power gear
4 – hand control wheel
5 – control box
6 – control box cover
7 – terminal box
8 – terminal box cover
9 – cable bushings P 16 (for control)
10 – electric motor terminal board
11 – position indicator
12 – cable bushing (for motor)
13 – local control block
Fig. 1 - Actuator assembly
Handwheel
locking screw
12 10 5 11 6 13
1 2 3 4
7
8
9

10
Three-phase asynchronous motor 1 drives the central wheel of the differential gear, through counter gear set
2. The central wheel is located in the actuator's bearing box (power transmission 3).
While operated by motor, the ring gear of the planetary gear differential is held in a constant position by means
of a self-locking worm gear. Hand wheel 4, connected with worm, allows manual control, even when motor is
running. The hollow output shaft is firmly connected with the planetary gear and passes into control box 5,
where all control elements of the actuator are concentrated – i.e. position, signalling and torque switches,
resistant or current position transmitter and heating element. Operation of position and signalling switches is
derived, through mechanisms, from the output shaft rotation.
The operation of torque switches is derived from the axial displacement of the “floating worm” of manual
control, which is sensed and transferred to the control box by a lever. Control elements are accessible upon
removal of cover 6 of this box. Also terminal box 7 is accessible upon removal of cover 8. Cable inlets are
secured by means of cable bushings P 16 (or P 21 and P 16 for versions with connector). Electric motor is fitted
with a separate terminal board 10 and a cable bushing. Output shaft position can be identified on position
indicator 11. The actuator's various operational functions such as tripping by torque, tripping by position,
signalling, remote position reporting (position transmitter) are provided by mechanical groups (units). These are
located on the control board (fig. 2, 2a), fitted inside the control box.
Other items are equivalent to items of control board with resistance transmitter (fig. 2a). Also micro switch terminal numbers are
identical. For actuators ser. No. 52 030, the transmitter bracket is turned by 180° against the drawing.
14 66 13
17 67
15
66
16
75
16
12
Fig. 2a - Control board – version with resistance position transmitter 2 x 100 Ω
12
10
13
11
Description:
12 – torque tripping unit
13 – signalling unit
14 – transmitter setting mechanism
15 – resistance position transmitter with mechanical
position indicator
16 – position unit
17 – heating element
66 – fixing screws
67 – basic control board
Numbers in circles correspond to terminal numbers
on the terminal board of the actuator.
Micro switches can be used only as single-circuit
micro switches.
14 67 66 22 20 21 24
15 14 16
18
17
19
23 25
15
12
13
66
17
16
Description:
5 – Vishay
resistance position transmitter
11 – local position indicator
14 – driving gear
15 – current position transmitter
(4 – 20 mA)
65 – adapters
19
65
5
65
11
1O
1O
Z
O
O
31
2
O
Z
65
5
14 11
65
Fig. 2b - Control board
- version with current position transmitter
Fig. 2c - Control board – version with current position
transmitter and VISHAY position indicator 1 x 100 Ω

11
Control units are differentiated by function as follows:
a) torque tripping unit -12-
b) signalling unit -13-
c) resistance transmitter setting mechanism -14-
d) position transmitters – resistance tr. 2 x 100 Ω with mechanical position indicator position indicator -15-
– current tr. 4 – 20 mA without position indicator -15a-
e) position unit -16-
f) heating element -17-
The above-stated units are universal for all sizes of MODACT MON, MOP, MONJ actuators.
Important notice:
Micro switches applied in the various units do not allow two voltages with varying values or phases to be connected
to the contacts of one micro switch. These micro switches can only be used as switches, interrupters or selectors for one
circuit.
Description and function of control units
a) Torque tripping unit (fig. 3)
- as an independent assembly unit, it consists of base plate 19, which carried micro switches 20 and at the same time
creates bearings for torque control shaft 22 and locking shaft 29.
Torque control shaft transfers motion of the floating worm from power gear, using segments 23 or 24 and
levers 45 or 46, to micro switches MZ or MO. Tripping torque value is adjusted by rotating the segments against
the tripping levers. To allow tripping torque setting outside the manufacturing plant, segments 23 are provided
with a scale providing individually for each actuator indications of points for setting up the maximum and
minimum torque. The set up torque is indicated by recesses in segments 27 or 28. Figures on the scale do not
give direct indication of the tripping torque. Increments on the scale only serve to provide a more accurate
division between the maximum and minimum torque levels, and thus to enable a more precise set-up of the
tripping torque outside the manufacturing plant if no loading bench is available. Segment 23 is intended for
“closing” direction, segment 24 for “opening” direction.
Micro switch diagram
Description:
19 – base plate
20 – micro switches MZ, MO
21 – adjuster
22 – torque control shaft
23 – top “closing” segment
24 – bottom “opening” segment
25 – locking “closing” screw
26 – locking “opening” screw
27 – bottom “closing” segment by recess
28 – bottom “opening” segment by recess
29 – locking shaft
44 – locking nut
46 – tripping “closing” lever
Numbers in circles correspond to terminal
numbers on the terminal board of the actuator.
Micro switches can be used only as single-cir-
cuit micro switches.
19 20 29 21 23 25 27
45 22 44 24 26 28
46 12
10
13
11
1
2
Fig. 3 - Torque tripping unit

12
The torque control unit is also fitted with two locking mechanisms. The first mechanism locks the torque switch once
tripped and prevents it from re-triggering and thus also the actuator from pulsing. The second locking mechanism
prevents the torque switch, after actuator rotation reversing, from tripping, and thus enables the electric motor’s
breakaway torque to be fully utilized. The locking mechanism operates in both directions of motion of the actuator’s
output shaft, both in limit positions and in the interim position, over 1 to 2 revolutions of the output shaft, after reversing of
its motion.
When the actuator’s output shaft is loaded by a restoring torque, the torque control shaft 22 rotates slightly, thus
making segments 23 or 24 rotate two, which transfer the motion to tripping lever 45 or 46. As soon as the torque on the
actuator’s output shaft achieves a value, to which the torque tripping unit has been set up to, the tripping lever will push
the button of the relevant micro switch, which will disconnect the electric motor from power supply, and the actuator will
stop.
Torque unit adjustment procedure
To set the tripping torque to another value, differing from the default value set at the manufacturing plant, proceed as
follows: release locking nut 44 (fig. 3), and the relevant locking screw 25 (for “closing” direction) or 26 (for opening
direction).
Subsequently, put a screwdriver into the recess in the top segment 23 or 24 and rotate the segment until the recess
in segment 27 or 28 points at the relevant point on the scale. This point can be identified by dividing the difference
between the maximum and minimum adjustable torque in Nm by the number of increments between the maximum and
minimum torque signs. This approach shows us how many Nm of tripping torque falls on one increment on the scale. By
interpolation, identify the point on the scale, at which the recess in segment 27 or 28 should point. The coloured line on
the scale that is closer to number 10 indicates the setting point of maximum tripping torque; the other line identifies the
setting point of minimum torque. The torque control unit must never be set up in a way that the recess in the bottom
segment lies outside the area between the two coloured lines on the scale.
Once the tripping torque has been set up, tighten locking screw 25 or 26 and locking nut 44.
b) Signalling unit (fig. 4)
- secures transmission of electric signal of the actuator input shaft’s position. The unit is driven by gear 38 from the
output shaft through a gearbox to cams 30, 31, controlling micro switches 36 (SO) and 37 (37). The switching moment of
signal switches can be selected in any point of the actuator's working stroke, except a narrow range around end positions
(signal switch must switch before the position switch while the output shaft is still moving). Top cam 37 pertains to
“closing” direction and bottom cam 36 pertains to “opening” direction.
Signalling unit is designed as a separate assembly. It is installed on bracket 39, below which gears are fitted,
organized according to the kinematic diagram (fig. 6). The transmission is set up so that setting gear K3 can be moved to
various levels (I, II, III, IV, V) once locking screw 47 is released. By adjusting gear K3, the setting range of signalling
switches and transmitter will change depending on the working stroke. Next to figure 6 is a table specifying setting
ranges corresponding to the various positions of setting gear K3.
Description:
30 – cams for “closing” direction
31 – cams for “opening” direction
32 – screws for cams for “closing” direction
33 – screws for cams for “opening” direction
34 – lever for “opening” direction
35 – lever for “closing” direction
36 – micro switch for “opening” (bottom) direction
37 – micro switch for “closing” (top) direction
38 – gear (driving gear)
39 –unit bracket
Micro switches can be only used as single-circuit micro
switches. Two voltages with different values or phases
must not be connected to the contacts of one micro
switch.
Fig. 4 - Signalling unit
Micro switch diagram
31 32 34 36 37 38 39
30 33 35
1
2
4

13
Signalling unit adjustment
If the set up range of signal switches and transmitter needs to be changed, you have to change the position
of setting wheel K3. To re-adjust wheel K3, you must partially slide the signalling unit out of the control box (the
length of wires connected to micro switches allows it). This can be done after removing three screws 66 (fig. 2),
which hold the unit on the base plate. Once the signalling unit is readjusted to the necessary range, reinstall the
unit. Before re-tightening screws 66, check wheels K1 and K2 (fig. 6) for correct meshing. Pinion 49 is slid on the
bottom end of cam shaft 48 (fig. 6), which is connected with shaft 48 by an adjustable friction clutch. Motion of
this pinion is sensed for actuating the resistance or current transmitter. Cams and micro switches of signalling
unit are aligned as shown on figure 4. Cam toes 30 displace levers 34 and 35, which further operate micro
switches 36 (SO) or 37 (SZ). When setting up signalling and position switches and transmitter, it is always
necessary to set the actuator output shaft to a position, in which the micro switches are supposed to switch or in
which the required position of transmitter is supposed to be reached.
When adjusting the signalling switches, first release screws 32 (for SZ) or 33 (for SO) – fig. 4. Then turn cam
30 or 31 - at micro switch SZ counter clockwise, at SO clockwise, until the micro switch switches. In this position,
hold the cams and re-tighten the locking screws.
Warning:
After each manipulation with locking screws in the control part of the actuator, these screws must be secured from releasing
by vibrations, by dropping quick-drying varnish on them. If these screws had previously been secured using the varnish, the old
varnish layer rests must be removed while adjusting, and the surface must be duly degreased.
c) Position unit (fig. 5)
This unit secures that switches PZ or PO will trip when the preset output shaft speed has been achieved. The unit’s rotary
motion is derived from the output shaft motion, by means of driving wheel 62.
This wheel turns stepwise the aligned gears, which control cam 57 (60). Cam turning to lever of switch PZ and PO will make
the switches change over.
Handling and adjustment
Unit is adjustable in the range specified in Table No. 1, 2. Adjustment procedure is as follows:
1) Once the actuator has been fixed to the valve, set valve to closed position using actuator.
2) In this position, push tripping rod 58 in vertical direction and then turn it by 90 degrees in any direction.
3) Turn set screw 56 in “Z” arrow direction until cam 57 pushes the spring of micro switch PZ 63.
4) Turn tripping rod 58 by 90°. Tripping rod will slip out again. If tripping rod fails to slip out, just very slightly turn screw 56 or 59.
5) Use actuator to move the valve by the required number of revolutions to open position.
6) Again push tripping rod 58 in vertical direction and then turn it by 90 degrees in any direction.
7) Turn set screw 59 in “O” arrow direction until cam 60 pushes the spring of micro switch PO 61.
8) Turn tripping rod 58 by 90°. Tripping rod will slip out again. If tripping rod fails to slip out, just very slightly turn screw 59 or 56.
Micro switch diagram
Description:
55 – decade gear
56 – set screw “closing”
57 – tripping cam “closing”
58 – tripping rod
59 – set screw “opening”
60 – tripping cam “opening”
61 – micro switch PO
62 – driving wheel
63 – micro switch PZ
Numbers in circles correspond to terminal
numbers on actuator terminal board.
Fig. 5 - Position unit
55 56 57 58 59
63 62 60 61
19
17
18
16
14
15
1
2
4

14
Note:
Stop turning screw 56, 59 at the moment of switching!
If, prior to adjustment, cams are in such a position as indicated on fig. 5 or if cam has already pushed the micro switch
button, it is advisable to proceed adjustment as follows:
After pushing and turning tripping rod 58, turn set screws 56 or 59 against arrows’ direction until the cam's tip leaves
the micro switch lever (towards the closest set screw) and the micro switch switches (use suitable tester to make sure
that micro switch has switched). Then turn set screw 56 or 59 in arrow direction to turn the cam’s tip back to the micro
Open Closed Terminal numbers
on terminal board
PO 15-16
14-15
PZ 18-19
17-18
Open Closed
SO 21-22
20-21
SZ 24-25
23-24
Contact closed Contact open
Working diagram of position and signalling switches
Description:
K1 – gear
K2 – driving gear
K3 – setting gear
47 – locking screw of setting gear
48 – cam shaft
49 – pinion with friction clutch
Output
shaft
Gearboax Cams
Adjustment range of working stroke (resistance position transmitter)
Fig. 6 - Kinematic diagram of gears
Note :
Position of setting gear for actuators ser.
No. 52 030 for the various gear ratios is
specified on left-hand side of figure above,
for other serial numbers on the right.
48 47
49
52 031 52 033
52 030 52 032 52 034 52 036
52 035
I 2 - 2,5 2 - 6,5 2 - 5 1 - 2,2
II 2,5 - 10,5 6,5 - 22 5 - 17 2,2 - 7,5
III 10,5 - 35 22 - 72 17 - 55 7,5 - 24
IV 35 - 111 72 - 220 55 - 190 24 - 82
V 111 - 250 220 - 250 190 - 240 82 - 100
Serial number
Gear
ratio

15
switch lever until the micro switch switches again (micro switch button is pressed). Now the micro switch has been
adjusted. Then slide tripping rod 58 out as described above.
d) Position transmitters
Resistance position transmitter 2 x 100 Ω including position indicator (fig. 8)
The fundamental component of this unit is resistance transmitter 42, whose rated resistance signal value is 100 Ω.
The transmitter has a shaft led out on two sides. On the bottom end, pinion 43 is slid on the shaft, which can slip through
on the shaft in both end positions of the transmitter, which is beneficial when adjusting this unit. Position indicator 40
is mounted on the top end of the transmitter shaft. Indicator is fixed on the transmitter shaft by means of screw 41.
This allows the position indicator to be adjusted relatively to the sight glass in the control box cover.
Resistance position transmitter setting mechanism (fig. 7)
This mechanism consists of toothed links 51 and 55, on which spring 52 is suspended. Bar with pins 53 provides
relative sliding motion of both links. This group rotates on pin 54. The entire mechanism is mounted on control base
plate 67 (fig. 2). Toothed links are in mesh with transmitter pinion 43 (fig. 8) and pinion 49 (fig. 6).
Position of pin 54 determines the gear ratio of the setting mechanism – i.e. for various values of working stroke of
actuator and thus also for positions of cam shaft in signalling unit, the transmitter turning angle and the local position
indicator turning angle is always 160°. This enables the rated transmitter signal value of 100 Ω to be available for any
working stroke value.
Adjustment of resistance transmitter and position indicator
To adjust the position transmitter: while input shaft is in “closed” position, slide link 51 (fig. 7) towards transmitter, from
meshing with pinion 49 (fig. 6). Then turn the link clockwise up to dead stop, which is provided by pole below the
signalling unit.
Now slide the link back to meshing position with pinion 49. The transmitter’s indicator should point at 0°.
If this is not the case, move link 51 back before the dead stop position and push link 55. This will release
transmitter pinion; now set transmitter indicator close to 0° sign on the scale so that once link 55 is brought into
meshing position with transmitter pinion, their teeth clinch correctly. Cautiously turn the transmitter shaft to
make sure their clinching is correct. Subsequently, slide link 51 from meshing position again and use extra force
to push it up to dead stop (transmitter pinion will slip through once transmitter indicator arrives at 0° sign). Again
bring link 51 into meshing position with pinion 49 (fig. 6). In this position, oval openings in toothed links are in
Description:
40 – position indicator
41 – indicator screw
42 – resistance transmitter
43 – transmitter pinion
Fig. 8 - Resistance transmitter with position indicator
Description:
51 – toothed link
52 – spring
53 – bar and pins
54 – setting pin
55 – toothed link
64 – screw
65 – setting lever
40
41
42
43
53
55
54
52
64
65
51
Fig. 7 - Resistance position transmitter setting
mechanism

16
parallel position with oval opening in control base plate 67 (fig. 2). Now the transmitter is adjusted for “closed”
position. Afterwards, release screw 64 (fig. 7), shift setting lever 65 (fig. 7) towards transmitter up to dead stop
and retighten screw 64 again.
Now adjust actuator to “open” position, while transmitter indicator will move to a position between 0° and 160°.
Release screw 64 and turn setting lever 65 anticlockwise until the transmitter indicator reaches 160 °C sign. Subsequently
re-tighten screw 64 again and drop quick-drying ink on it to prevent it from releasing. Thus the transmitter is set to “open”
position. Position indicator is affixed to the axis of resistance transmitter 42 (fig. 8) using screw 41. Release this screw
and, in “open position”, turn indicator in such a way that 100 sign on the scale of indicator -40- lines up with the colour
spot on the eye sight in the control box cover. Subsequently, tighten screw 41 and secure it in tightened position by
dropping quick-drying varnish on it.
Vishay resistance transmitter
Alternatively, actuators MON can be equipped with a Vishay resistance transmitter. This transmitter has
a shaft led out on one side, with double wheel 73, consisting of toothed gears A and B, fixed on the end of the
shaft. The principle of drive and adjustment of Vishay transmitter is identical to current transmitter CPT 1Az.
The only difference consists in sizes of toothed gears A and B of double wheel 73, and thus also in table including
values for working stroke setting.
Adjustment of resistance position transmitter
First of all, it is necessary to set up suitable gear ratio between actuator output shaft and transmitter shaft as per
required working stroke of actuator – see table below.
To do this setting, use setting wheel K3 inside the transmission box of signalling unit as described under
point b) above. Further, you must bring the necessary gear of the double wheel, affixed on the transmitter shaft,
into meshing position. Gear with smaller diameter is identified as A, larger gear as B. Carry out alignment by
moving spacers 72 either below the transmitter bracket (to make gear A mesh) or above the transmitter bracket
(to make gear B mesh). This must be done in a position when the transmitter bracket is in the furthermost
distance from the transmission box.
Afterwards, screws fixing the transmitter bracket must be slightly re-tightened to make possible for the transmitter
bracket to be moved to a position, when gear A or B is in meshing position with the driving gear. In this position, check
gears meshing and, when necessary, adjust the relative height of double wheel against the driving gear by means of
spacers on the transmitter shaft. A minor play must be maintained between gear A (or B) and the driving gear to prevent
transmitter shaft from strain in perpendicular direction to its axis. Now properly tighten the fixing screws of transmitter
bracket and secure them using varnish.
Select gear ratio for wheel K 3 and gears A, B using the following table. If the required working stroke lies in two
ranges at the same time, it is preferable to select the lower range.
Wheel on transmitter - gears
Description:
68 – resistance transmitter
69 – transmitter bracket
70 – locking screw
71 – adapter
72 – spacers
73 – double wheel
74 – spacer rings
B
A
73
72
70
71
74 69
K3
68
70
71
A
B
73
K3
686972 74

17
Table for adjusting working stroke of resistance position transmitter
Once suitable gear ratio has been set up, adjust resistance transmitter as follows:
Due to the stepwise gear ratio of the signalling unit, the potentiometer traveller does not always move over the entire
range of the resistance path, but only in a part of it.
When adjusting the signalling unit to “open” and “closed” end positions as per point b), the resistance transmitter will
automatically be adjusted to a certain position.
Final adjustment of the transmitter is carried out as follows:
Set actuator output shaft to “closed” position. Then release screws on adaptors of transmitter so that the whole
transmitter can be turned. Afterwards, rotate the transmitter to adjust it to the lowest resistance value (approx. 4 Ω, not
less) and re-tighten screws on adapters. When actuator is switched on, or while turning the hand wheel to “open” position,
resistance will start rising up to resistance value corresponding to “open” end position (50 Ω to max. 98 Ω). Now the
transmitter has been adjusted.
Local position indicator
Local position indicator (fig. 8a) serves to
determine the approximate position of output shaft.
It is mechanically attached to cam shaft of signalling
unit pos. 49, and can detached. When setting up
cam shafts of signalling unit, the whole indicator
assembly must be removed after releasing fixing
screws pos. 48.
Position adjustment
First of all, position and signalling unit must be
adjusted as per point b) of Installation Manual. Once
this unit has been adjusted, attach indicator assembly
to cam shaft and adjust indicator according to the
following procedure: Set actuator output shaft to
“closed” position. When actuator is in this position, after
releasing screw pos. 47, set “closed” sign of bottom
indicator against signalling unit’s pillar, indicated on
figure 2a with bold print. (The position of this pillar then
corresponds to the position of the sign on the eye sight
of the cover, once attached). Tighten screw pos. 47
and move output shaft of actuator to “open” position. In
this position, use the same approach to adjust “open”
sign of the top indicator, again against the same
signalling unit pillar. While doing so, make sure not to
change the already set up position of bottom “closed”
indicator. After attaching the cover, check the accuracy
of signs setting against sign on eye sight, and adjust
position if necessary. Now the indicator has been
adjusted for both end positions.
I A 0,5 - 1,1 1,2 - 2,5 0,9 - 1,8
B 0,9 - 1,9 2,3 - 4,6 1,7 - 3,4
II A 1,7 - 3,5 4,0 - 8,2 3,1 - 6,4
B 3,2 - 6,4 7,7 - 15,4 5,9 - 11,7
III A 5,8 - 11,7 13,8 - 27,7 10,6 - 21,4
B 10,4 - 20,8 25,6 - 51,3 19 - 38
IV A 20 - 39,9 46,8 - 93,8 36,4 - 73
B 37,4 - 74,8 86 - 172,2 68,5 - 137
V A 67,1 - 134,2 155,4 - 311,1 122,9 - 245,7
B 122,5 - 245,3 292 - 584,5 224,3 - 450
Serial number
Gear on
transmitter
Gear ratio
52030 52031 - 52032 52033 - 52035
Fig. 8a - Position indicator
Description:
43 – indicator shaft
44 – bottom “closing” indicator
45 – top “opening” indicator
46 – driving rubber collar
47 – locking screw
48 – fixing screw
49 – top cam with opening
46
43
48
47
44
45
49
4647
45
44
43
48
49

18
Current position transmitter CPT 1Az – adjustment
Before starting to adjust the current transmitter, end positions (torque or position switches) of actuator must be
adjusted and connected to tripping circuits of electric motor. In case of external power supply source, it must be verified
that it does not exceed the maximum value of 30 V DC (limit value when CPT 1Az still will not be destructed).
Recommended value is 18 to 28 V DC.
Connect positive pole to positive pole of transmitter CPT 1Az and connect milli-ammeter with minimum accuracy of
0.5 %. Current loop must be grounded in one point. No grounding is displayed on drawing; this can be executed in any
point of the circuit.
1 . Set output shaft to “closed” position. When closing, the current signal value must drop. If it rises, release the
transmitter body and turn it by approx. 180° to changeover to the dropping portion of the output curve. Adjust 4 mA by
fine turning. Tighten adapters to secure transmitter from voluntary turning.
2. Set output shaft to “open” position and use potentiometer to set 20 mA on the transmitter body. The potentiometer’s
range is 12 revolutions and has no dead stops, so it cannot be damaged by overturning.
3. Again verify current value in “closed” condition. If the value has changed too much, repeat points 1 and 2. If the
necessary corrections are too extensive, this procedure must be repeated several times. Once set up, secure
the transmitter from turning and drop varnish on locking screws .
4. Use voltmeter to check voltage on terminals of CPT 1Az. To maintain output signal integrity, voltage must not drop
below 9 V even at power take-off of 20 mA. If this condition is not fulfilled, feeding voltage must be increased (within
the range of recommended values) or the total resistance of current loop R must be reduced.
Warning!
Do not connect transmitter CPT 1Az without prior check of feeding voltage. Transmitter outlets must not be connected
in the actuator with actuator ground conductor or earth, not even incidentally.
Prior to checking feeding voltage, first disconnect transmitter from power supply source. On actuator’s terminals, where
the transmitter is connected to, determine voltage firstly using voltmeter with input resistance at least 1 MΩ. Voltage must
lie between 18 to 25 V=, and must in no case exceed 30 V (this would result in transmitter destruction). Then connect
transmitter so that the positive pole of power supply source is connected to positive pole of transmitter, i.e. to pin with red
insulator (r) + (closer to transmitter’s centre). Terminal with white collar (connected to terminal 52) is connected to negative
pole of transmitter (white insulator). On newer versions, the red conductor is +, black conductor is -.
Connect mA-meter, digital as far as possible, with an accuracy of at least 0.5 %, in series with the transmitter. Set
output shaft to “closed” position. While doing so, the signal value must sink. If this is not the case, turn the output shaft
in “closing” direction until the signal starts decreasing and until the output shaft reaches “closed” position.
Then release screws on adaptors of transmitter so that the whole transmitter can be turned. Turn the whole transmitter
to adjust current to 4 mA, and tighten adapter screws. Subsequently adjust actuator output shaft to “open” position. Use
resistance trimmer in the front part of transmitter (closer to the edge) to set current to 20 mA. The trimmer’s range is 12
revolutions and has no dead stops, so it cannot be damaged by overturning.
If correction of 20 mA has been significant, repeat adjustments to 4 mA and 20 mA once again. Then disconnect
the mA-meter. It is forbidden to turn the screw with varnish drops close to the centre. Properly tighten screws that lock
the transmitter adapters, and use varnish to protect them from release.
After adjustment, use voltmeter to verify voltage on transmitter terminals. It must lie between 9 and 16 V at
the current of 20 mA.
CPT 1Az
U UR
mA V
R
red
51 51 52 52
red
white white
CPT 1Az

19
Note:
The transmitter’s curve has two branches - a decreasing branch relatively to “Z” position, or a rising branch relatively
to “Z” position. To select transmitter’s curve, turn the transmitter body.
Current position transmitters DCPT - adjustment
1. Limit positions adjustment
Before starting to adjust, it must be verified that end positions lie within the range between 60°and 340° of
DCPT revolution. Otherwise, an error will be indicated after adjustment (LED 2x).
1.1. Position “4 mA”
Adjust actuator to the required position and push “4” button until LED blinks (approx. for 2 sec).
1.2. Position “20 mA”
Adjust actuator to the required position and push “20” button until LED blinks (approx. for 2 sec).
2. Running rotation adjustment
Running direction is determined by viewing from DCPT panel side.
2.1. Left-turning direction
Push “20” button, then button “4” and hold them both pressed until LED blinks.
2.2. Right-turning direction
Push “4” button, then button “20” and hold them both pressed until LED blinks.
Description:
68 – current transmitter CPT 1Az
69 – transmitter bracket
70 – locking screw
71 – adapter
72 – oval spacers
73 – double wheel
74 – spacer rings
Fig. 9 - Wheel on transmitter - gears (version with current position transmitter)
Table of working stroke adjustment for current position transmitter CPT 1Az
68 69 70 71
K3
č (-)
r/č (+)
74 73 72
B
A
black (-)
red (+)
03025230-1302553-33025
IA8,1-9,06,2-3,12-1
B3,3-6,18,4-4,2 7,3-8,1
II A2,4-1,2 8,8-4,48,6-4,3
B9,6-4,361-83,21-1,6
III A4,31-7,66,92-8,418,22-4,11
B3,32-6,1145-72 7,14-8,02
VI A9,24-4,12 99-945,67-8,73
B5,87-2,93181-09931-5,96
VA441-57433-761852-921
B362-131906-403074-432
Gear
ratio
Gear on
transmitter
Serial number
52 030 52 031 - 032 52 033 - 035

20
When reversing the running rotation direction, end positions “4 mA” and “20 mA” remain saved, but the operating
area (DCPT’s trajectory) between these two points will change so as to supplement the original operating area. This may
lead to exceeding the permitted range of operating area (LED 2x) - may be lower than 60°.
3. Error messages
In case of an error, LED will indicate the following error codes:
1x Switch position outside operating area
2x Wrong set up of operating area
3x Outside magnetic field tolerance area
4x Wrong EEPROM parameters
5x Wrong RAM parameters
4. Calibration of currents 4 mA and 20 mA
During power up, hold buttons “4” and “20” pressed and release them after LED blinks once. Like this you enter
menu described under 4.1 Calibration 4 mA.
4.1. Calibration of current 4 mA
Connect amp-meter to testing terminals. Push button “20”. Pushing button without interruption will trigger an auto-
repeat command with current decrease. By releasing the button, you confirm the set-up of the currently active value.
4.2. Calibration of current 20 mA
Connect amp-meter to testing terminals. Push button “4”. Pushing button without interruption will trigger an auto-
repeat command with current increase. By releasing the button, you confirm the set-up of the currently active value.
4.3. Toggling between calibration menus of 4 mA and 20 mA
Enter 4 mA calibration menu:
Push “4” button, then button “20” and hold them both pressed until LED blinks.
Enter 20 mA calibration menu:
Push “20” button, then button “4” and hold them both pressed until LED blinks.
5. Entering standard parameters
During power up, hold buttons “4” and “20” pressed and release the after two LED blinks.
ATTENTION! During this approach, the transmitter calibration will also be overwritten, and thus needs to be carried
out additionally!!!
Parameter setup
8. PACKAGING AND STORAGE
When shipping to domestic customers, actuators are transported unpacked. Covered means of transport or transport
cases are used for actuators shipping.
When shipping to foreign customers, actuators must be provided with packing. Type and version of packing must be
adapted to the transport conditions and distance to place of destination.
Position “4 mA”
Set actuator to the required position (mostly closed)
and push button 4 until LED blinks
Position “20 mA”
Set actuator to the required position (mostly open)
and push button 20 until LED blinks
20
4
- L
+ L
- U
+ U
1DCPT
EHL elektronika
v.č. 000106
20
4
- L
+ L
- U
+ U
1DCPT
EHL elektronika
v.č. 000106
2 s
2 s