SMC Networks C RB 10 Series User manual

文書 No.JCRB-OM00003
Model name
ROTARY ACTUATOR
Standard Type
Part number / Series
C  RB  10 to 40- 

INDEX
Precautions for Safety Front matter
1. Product Description 1
How to order 1
Specifications 1
Effective Torque 2
Chamfer Position and Rotation Range 3
2. Internal Construction and Description of Individual Parts 4
Standard Type (Size 10, 15) 4
Standard Type (Size 20, 30, 40) 5
With Auto Switch 6
Auto Switch Proper Mounting Position 7
Operating Angle and Hysteresis Angle 7
3. Basic Circuit 8
Circuit Configuration 8
Preferred Components 8
4. Setting 8
Shaft Load Limit 9
Use of Shaft Coupling 9
How to Mount Loads 10
Mounting 10
Adjusting the rotating angle 11
Operating environment 12
5. Setting of Rotation Time 13
Moment of Inertia 13
Kinetic Energy 15
Eternal Stopper 16
6. Maintenance and Inspection 17
Standard Type (Size 10, 15) 17
Standard Type (Size 20, 30, 40) 18
With Auto Switch (Size 20, 30, 40) 19
7. Troubleshooting 20
Notice on Trouble and Troubleshooting 21

前付 1
Safety Instructions
These safety instructions are intended to prevent hazardous situations and/ or equipment damage.
These instructions indicate the level of potential hazard with the labels of “Caution,” “Warning” or “Danger”.
They are all important notes for safety and must be followed in addition to International Standards (ISO/ IEC)
Japan Industrial Standards (JIS)*1) and other safety regulations.
*1) ISO 4414: Pneumatic fluid power -- General rules relating to systems
ISO 4413: Hydraulic fluid power -- General rules relating to systems
IEC 60204-1: Safety of machinery -- Electrical equipment of machines (Part 1: General requirements)
ISO 10218-1992: Manipulating industrial robots -- Safety
etc.
Caution
Operator error could result in injury or equipment damage.
Warning
Operator error could result in serious injury or loss of life.
Danger
In extreme conditions, there is a possibility of serious injury or loss of life.

前付 2
Warning
1. The compatibility of the product is the responsibility of the person who designs the
equipment or decides its specifications.
Since the product specified here is used under various operating conditions, its compatibility with
specific equipment must be decided by the person who designs the equipment or decides its
specifications based on necessary analysis and test results.
The expected performance and safety assurance of the equipment will be the responsibility of
the person who has determined its compatibility with the product.
This person should also continuously review all specifications of the product referring to its latest
catalog information, with a view to giving due consideration to any possibility of equipment failure
when configuring the equipment.
2. Only personnel with appropriate training should operate machinery and equipment.
The product specified here may become unsafe if handled incorrectly.
The assembly, operation and maintenance of machines or equipment including our products
must be performed by an operator who is appropriately trained and experienced.
3. Do not service or attempt to remove product and machinery/equipment until safety is
confirmed.
1) The inspection and maintenance of machinery/equipment should only be performed after
measures to prevent falling or runaway of the driven objects have been confirmed.
2) When the product is to be removed, confirm that the safety measures as mentioned above
are implemented and the power from any appropriate source is cut, and read and understand
the specific product precautions of all relevant products carefully.
3) Before machinery/equipment is restarted, take measures to prevent unexpected operation
and malfunction.
4. Contact SMC beforehand and take special consideration of safety measures if the product
is to be used in any of the following conditions.
1) Conditions and environments outside of the given specifications, or use outdoors or in a place
exposed to direct sunlight.
2) Installation on equipment in conjunction with atomic energy, railways, air navigation, space,
shipping, vehicles, military, medical treatment, combustion and recreation, or equipment in
contact with food and beverages, emergency stop circuits, clutch and brake circuits in press
applications, safety equipment or other applications unsuitable for the standard specifications
described in the product catalog.
3) An application which could have negative effects on people, property, or animals requiring
special safety analysis.
4) Use in an interlock circuit, which requires the provision of double interlock for possible failure
by using a mechanical protective function, and periodical checks to confirm proper operation.
Caution
The product is provided for use in manufacturing industries.
The product herein described is basically provided for peaceful use in manufacturing industries.
If considering using the product in other industries, consult SMC beforehand and exchange
specifications or a contract if necessary.
If anything is unclear, contact your nearest sales branch.

前付 3
Limited warranty and Disclaimer / Compliance Requirements
The product used is subject to the following “Limited warranty and Disclaimer” and
“Compliance Requirements”.
Read and accept them before using the product.
Limited warranty and Disclaimer
1. The warranty period of the product is 1 year in service or 1.5 years after the product is
delivered, whichever is first. ＊2)
Also, the product may have specified durability, running distance or replacement parts.
Please consult your nearest sales branch.
2. For any failure or damage reported within the warranty period which is clearly our
responsibility, a replacement product or necessary parts will be provided.
This limited warranty applies only to our product independently, and not to any other
damage incurred due to the failure of the product.
3. Prior to using SMC products, please read and understand the warranty terms and
disclaimers noted in the specified catalog for the particular products.
＊2) Vacuum pads are excluded from this 1 year warranty.
A vacuum pad is a consumable part, so it is warranted for a year after it is delivered.
Also, even within the warranty period, the wear of a product due to the use of the vacuum pad or failure due
to the deterioration of rubber material are not covered by the limited warranty.
Compliance Requirements
When the product is exported, strictly follow the laws required by the Ministry of Economy,
Trade and Industry (Foreign Exchange and Foreign Trade Control Law).

前付 4
Design / Selection
(1) Confirm the specifications.
Products represented in this catalog are designed only for use in compressed air systems.
Do not operate at pressures or temperatures, etc., beyond the range of specifications, as this can cause
damage or malfunction. (Refer to the specifications.)
Please contact SMC when using a fluid other than compressed air.
We do not guarantee against any damage if the product is used outside of the specification range.
(2) If the operation involves load fluctuations, ascending/descending movements, or changes in friction
resistance, make sure to provide safety measures.
Failure to provide such measures could accelerate the movement, which may be hazardous
to humans, machinery, and other equipment.
(3) If there is a chance that the product will pose a hazard to humans, install a protective cover.
If the moving portion of the product will pose a hazard to humans or will damage machinery or equipment,
provide a construction that prevents direct contact with those areas.
(4) Make sure that the secured portions will not loosen.
Be sure to adopt a reliable connecting method if the rotary table is used very frequently or if it is used in a
location that is exposed to a large amount of vibrations.
(5) There may be cases in which a speed reduction circuit or a shock absorber is required.
If the driven object moves at high speeds or is heavy, it will be unfeasible for only the rotary actuator cushion
to absorb the shock. Therefore, provide a speed-reduction circuit to reduce the rotary actuator speed before
the thrust is applied to the cushion, or an external shock absorber to dampen the shock. If these
countermeasures are taken, make sure to take the rigidity of the mechanical equipment into consideration.
(6) Consider the possibility of a reduction in the circuit air pressure caused by a power failure.
When an actuator is used as clamping mechanism, there is a danger of workpiece dropping if there is a
decrease in clamping force, due to a drop in circuit pressure caused by a power failure. Therefore, safety
equipment should be installed to prevent damage to machinery and bodily injury.
(7) Consider the possibility of power source related malfunctions that could occur.
For equipment that relies on power sources such as compressed air, electricity, or hydraulic pressure, adopt
countermeasures to prevent the equipment from causing a hazard to humans or damage to the equipment in
the event of malfunction.
(8) If a speed controller is provided in the exhaust restrictor, implement a safety design taking the residual
pressure into consideration.
If air pressure is applied to the air supply side without residual pressure in the exhaust side, the rotary actuator
will operate at abnormally high speeds, which could pose a hazard to humans and damage the machinery and
equipment.
(9) Consider the behavior of the rotary actuator in the event of an emergency stop.
Devise a safe system so that if a person engages the emergency stop, or if a safety device is tripped during a
system malfunction such as a power failure, the movement of the rotary actuator will not cause a hazard to
humans or damage the equipment.
(10) Consider the action of the rotary actuator when restarting after an emergency stop.
Devise a safe design so that the restarting of the rotary actuator will not pose a hazard to humans or damage
the equipment. Install manually controlled equipment for safety when the actuator has to be reset to the starting
position.
(11) Do not use the product as a shock absorber.
If an abnormal pressure or air leakage occurs, the rotary actuator speed reduction capability could become
severely affected, which could pose a hazard to humans and damage the machinery and equipment.
Warning

前付 5
(12) Select a speed within the product’s allowable energy value.
If the kinetic energy of the load exceeds the allowable value, it could damage the product, and cause a
hazard to humans and damage the machinery and equipment.
(13) Provide a shock absorber if the kinetic energy that is applied to the product exceeds the
allowable value.
If the product’s kinetic energy exceeds the allowable value, it could damage the product, and cause a hazard
to humans and damage the machinery or equipment.
(14) Do not stop or hold the product at midpoint by keeping air pressure in the product.
For a product without an external stopping mechanism, if a directional control valve is closed to keep the air
pressure in the product, in an attempt to stop the product at midpoint, it might not be possible to maintain
that stopped position due to an air leakage. As a result, it could pose a hazard to humans and cause
damage to machinery and/or equipment.
(15) Do not use two or more rotary actuator with the aim of synchronized movement.
One of the actuators may bear the load of operation, making synchronized movement impossible, and
possibly leading to deformation of the equipment.
(16) Do not use in a location where external leakage of lubricant could have an adverse effect.
The lubricant coating the interior of the product may leak to the outside of the product from connecting parts
of the rotary body, cover, etc.
(17) Do not disassemble the product or make any modifications, including additional machining.
This may cause human injury and/or an accident.
(18) Refer to the Auto Switches Precautions when using with an auto switch.
Selection
(1) Do not use below the adjustment range specified for the product.
If the product is used below the specified speed adjustment range, it could cause the product to stick, slip, or
the movement to stop.
(2) Do not apply external torque to the product that exceeds the rated output.
If an external force that exceeds the product’s rated output is applied to the product, it could damage the
product.
(3) If it is necessary to provide repeatability of the rotation angle, directly stop the load externally.
Even with a product that is equipped with an angle adjuster, there are times when the initial rotation angle
could change.
(4) Do not use the product under hydraulic pressure.
The product will be damaged if it is used by applying hydraulic pressure.
(5) Do not use in a location where there are many temperature fluctuations.
When using in lower temperature applications, take care not to allow frost inside the cylinder.
Operation may be unstable.
(6) Perform speed adjustment in the environment in which the product is to be used.
Speed adjustments may be necessary if the environmental conditions vary.
Caution

前付 6
Mounting
(1) Operation manual
Install the product and operate it only after reading the operation manual carefully and understanding its
contents. Also, keep the manual in a location where it can be referred to as necessary.
(2) Ensure sufficient space for maintenance activities.
When installing the products, allow access for maintenance.
(3) Tighten threads with the proper tightening torque.
When installing the products, follow the listed torque specifications.
(4) Before adjusting the angle by supplying air pressure, take appropriate measures to prevent the
equipment from rotating unnecessarily.
When an adjustment is performed under air pressure, the equipment could rotate and fall during the adjustment,
depending on the mounted posture of the equipment. As a result, it could pose a hazard to humans and damage
the machinery and equipment.
(5) Do not place a magnetic object near the product.
The auto switch is a magnetic sensing type. If a magnetic object is placed close to it, the rotary actuator could
operate suddenly, which could pose a hazard to humans and damage the machinery and equipment.
(6) Do not perform additional machining to the product.
Additional machining to the product can result in insufficient strength and cause damage to the product.
This can lead to possible human injury and damage to the surrounding equipment.
(7) Do not enlarge the fixed throttle by modifying the pipe connectors.
If the hole diameter is enlarged, the product’s rotation speed will increase, causing the shock force to increase
and damage to the product. As a result, it could pose a hazard to humans and damage the machinery and
equipment.
(8) If shaft couplings are to be used, use those with angular freedom.
If shaft couplings that lack angular freedom are used, they could scrape due to eccentricity, leading to
equipment malfunction and product damage. As a result, it could pose a hazard to humans and damage the
machinery and equipment.
(9) Do not apply a load that exceeds the values given in the catalog.
If a load that exceeds the allowable values is applied to the product, it could lead to equipment malfunction, a
hazard to humans, and damage to the machinery and equipment.
(10) Place an external stopper in a position away from the rotating shaft.
If the stopper is placed near the rotating shaft, the torque that is generated by the product itself will cause the
reaction force which is directed to the stopper to be redirected and applied to the rotating shaft. This will lead
to the breakage of the rotating shaft and bearing. As a result, it could pose a hazard to humans and damage
the machinery and equipment.
Precautions when using external stoppers
Be sure to install external stoppers in the proper places. Installation in the wrong place can result in equipment
breakage, which could damage other equipment or cause human injury.
Warning

前付 7
Precautions when Converting Rotational Motion to Linear Motion
When using a link mechanism, etc., to convert rotational motion to linear motion, and determining the operation
end using the stopper on the linear motion end (see below), a small value for θ at the operation end may result in
the torque of the rotary actuator causing excessive radial load to act on the output axle, and equipment breakage
may occur.
Install a stopper on the rotation motion side, or increase the value of θ at the operation end, to make sure the load
generated does not exceed the allowable value for the product.
(11) Do not use springs, etc., to add force in the rotational movement direction.
When rotational force from an external spring, etc., acts and generates negative pressure on the product’s
interior, breakage of the internal seal or acceleration of abrasion may occur.
(1) Do not use organic solvent to wipe the area of the name plate that shows the model.
It will erase what is indicated on the name plate.
(2) Do not hit the output shaft by securing the body or hit the body by securing the output shaft.
These actions could cause the table to bend or damage the bearing. When a load must be coupled to the output
shaft, secure the output shaft.
(3) Do not step directly onto the table or on the equipment that is coupled to the table.
Standing directly on the output shaft could cause the output shaft or the bearing to become damaged.
(4) If a product is equipped with an angle adjustment function, use it within the specified adjustment range.
If the product is used outside the specified adjustment range, it could lead to equipment malfunction or product
damage. Refer to the product specifications for details on the adjustment range of the products.
ストッパ
Rotary table
Stopper
Caution

前付 8
Piping
(1) Refer to the Fittings and Tubing Precautions (Best Pneumatics No.6) for handling one touch fittings.
(2) Preparation before piping
Before piping is connected, it should be thoroughly blown out with air (flushing) or washed to remove chips,
cutting oil and other debris from inside the pipe.
(3) Wrapping of pipe tape
When screwing piping or fittings into ports, ensure that chips from the pipe threads or sealing material do not
enter the piping. Also, if pipe tape is used, leave 1.5 to 2 thread ridges exposed at the end of the threads.
Speed and cushion adjustment
(1) To make a speed adjustment, gradually adjust starting from the low speed end.
If the speed adjustment is performed from the high speed end, it could damage the product.
As a result, it could pose a hazard to humans and damage the machinery and equipment.
For products with shock absorbers, when the shock absorber stops moving before reaching the stroke
end by using a stopper mechanism with the objective of shortening tact time, be sure the shock
absorber is stopped in a position where it has adequately absorbed the kinetic energy.
Failure to do so can result in damage to equipment.
Lubrication
(1) This product should be used without lubrication. Although it will operate even if it is lubricated, it could
lead to sticking or slipping.
Pipe tape
Leave approx.
2 threads exposed
Winding
direction
Caution
Warning
Warning

前付 9
Air Supply
(1) Type of fluids
Please consult with SMC when using the product in applications other than compressed air.
(2) When there is a large amount of moisture
Compressed air containing a large amount of moisture can cause malfunction of pneumatic equipment. An air
dryer or water separator should be installed upstream from filters.
(3) Drain flushing
If condensation in the drain bowl is not emptied on a regular basis, the bowl will overflow and allow the
condensation to enter the compressed air lines. This may cause malfunction of pneumatic equipment.
If the drain bowl is difficult to check and remove, installation of a drain bowl with an auto drain option is
recommended.
(1) When extremely dry air is used as the fluid, degradation of the lubrication properties inside the
equipment may occur, resulting in reduced reliability (or reduced service life) of the equipment. Please
consult with SMC.
(2) Install an air filter.
Install an air filter upstream near the valve. Select an air filter with a filtration size of 5μm or smaller.
(3) Take measures to ensure air quality, such as by installing an aftercooler, air dryer, or water separator.
Compressed air that contains a large amount of moisture can cause malfunction of pneumatic equipment such
as rotary actuator. Therefore, take appropriate measures to ensure air quality, such as by providing an
aftercooler, air dryer, or water separator.
(4) Ensure that the fluid and ambient temperature are within the specified range.
If the fluid temperature is 5°C or less, the moisture in the circuit could freeze, causing damage to the seals and
equipment malfunction. Therefore, take appropriate measures to prevent freezing.
Operating Environment
(1) Do not use in an atmosphere containing corrosive gases, chemicals, sea water, water, steam, or where
there is direct contact with any of these.
Refer to the construction diagram for information on the materials used in the rotary actuator.
(2) Do not expose the product to direct sunlight for an extended period of time.
(3) Do not use in a place subject to heavy vibration and/or shock.
(4) Do not mount the product in locations where it is exposed to radiant heat.
(5) Do not use in dusty locations or where water oil, etc., splash on the equipment.
Warning
Caution
Warning

前付 10
Maintenance
(1) Perform maintenance inspection according to the procedures indicated in the operation manual.
If handled improperly, malfunction and damage of machinery or equipment may occur.
(2) Maintenance work
If handled improperly, compressed air can be dangerous. Assembly, handling, repair and element replacement
of pneumatic systems should be performed by a knowledgeable and experienced person.
(3) Drain flushing
Remove drainage moisture from air filters regularly.
(4) Removal of equipment, and supply/exhaust of compressed air
When components are removed, first confirm that measures are in place to prevent workpieces from dropping,
run-away equipment, etc. Then, cut off the supply pressure and electric power, and exhaust all compressed air
from the system using the residual pressure release function.
When machinery is restarted, proceed with caution after confirming that appropriate measures are in place to
prevent cylinders from sudden movement.
(1) For lubrication, use the designated grease for each specific product.
The use of a non-designated lubricant could damage the seals.
Warning
Caution

前付 11
Auto Switches Precautions
Design / Selection
(1) Confirm the specifications.
Read the specifications carefully and use this product appropriately. The product may be damaged or
malfunction if it is used outside the range of specifications of current load, voltage, temperature or impact.
We do not guarantee against any damage if the product is used outside of the specification range.
(2) Cautions for use in an interlock circuit
When an auto switch is used for an interlock signal requiring high reliability, devise a double interlock system
to avoid trouble by providing a mechanical protection function, or by also using another switch (sensor) together
with the auto switch.
Also, perform regular maintenance and confirm proper operation.
(3) Do not make any modifications (including exchanging the printed circuit boards) to the product.
This may cause human injuries and accidents.
(1) Pay attention to the length of time when a switch is ON at an intermediate stroke position.
When an auto switch is placed at an intermediate position of the stroke and a load is driven, at the time the
piston passes the auto switch will operate, but if the speed is too great the operating time will be shortened and
the load may not operate properly.
The maximum piston speed is:
V ( mm / s ) = ×1000
(2) Keep wiring as short as possible.
<Reed>
As the length of the wiring to a load gets longer, the rush current at switching ON becomes greater, and this
may shorten the product’s life. (The switch will stay ON all the time.)
1) Use a contact protection box when the wire length is 5m or longer.
2) Even if an auto switch has a built-in contact protection circuit, when the wiring is more than 30m long, it is
not able to adequately absorb the rush current and its life may be reduced.
It is again necessary to connect a contact protection box in order to extend its life. Please consult SMC in
this case.
<Solid state>
3) Although wire length should not affect switch function, use a wire 100m or shorter.
Even if the length is less than 100m, longer wiring makes it more likely to be affected by noise.
When the wire length is long, we recommended a ferrite core should be attached to both ends of the cable
to prevent excess noise.
A contact protection box is not necessary for solid state switches due to the nature of the product construction.
Auto switch operating range (mm)
Load applied time (ms)
Warning
Caution

前付 12
(3) Do not use a load that generates surge voltage. If a surge voltage is generated,
discharge may be generated at the contact, possibly reducing the product life.
If driving a load such as a relay that generates a surge voltage.
<Reed>
Use an auto switch with built-in contact protection circuit or use a contact protection box.
<Solid state>
Use a built-in surge absorbing element type device.
(4) Take precautions when multiple rotary actuator are used close together.
When multiple auto switch rotary actuator are used in close proximity, magnetic field interference may cause
the auto switches to malfunction. Maintain a minimum separation of 40mm between rotary actuator.
The auto switches may malfunction due to the interference from the magnetic fields.
Use of a magnetic screen plate (MU-S025) or commercially available magnetic screening tape can reduce the
interference of magnetic force.
(5) Pay attention to the internal voltage drop of the auto switch.
<Reed>
1) Auto switch with an indicator light
●If auto switches are connected in series as shown below, note that there will be a large voltage drop because
of internal resistance in the LED. (Refer to the internal voltage drop in the auto switch specifications.)
[The voltage drop will be “n” times larger when “n” auto switches are connected.]
Even though an auto switch operates normally, the load may not operate.
●In the same way, when operating under a specified voltage, although an auto switch may operate normally,
the load may not operate. Therefore, the formula below should be satisfied after confirming the minimum
operating voltage of the load.
Supply Internal voltage Minimum operating
voltage drop of auto switch voltage of load
2) If the internal resistance of an LED causes a problem, select an auto switch without an indicator light.
<Solid state / 2-wire type>
3) Generally, the internal voltage drop will be greater with a 2-wire solid state auto switch than with a reed auto
switch. Take the same precautions as in 1).
Also, take note that a 12VDC relay is not applicable.
(6) Pay attention to leakage current.
<Solid state / 2-wire type>
Current (leakage current) flows to the load to operate the internal circuit even when in the OFF state.
Operating current of load (OFF condition) > Leakage current
If the criteria given in the above formula are not met, it will not reset correctly (stays ON).
Use a 3-wire switch if this specification will not be satisfied.
Moreover, leakage current flow to the load will be “n” times larger when “n” auto switches are connected in
parallel.
(7) Ensure sufficient clearance for maintenance activities.
When designing an application, be certain to allow sufficient clearance for maintenance.
(8) Use the rotary actuator and auto switch in proper combination.
The auto switch is pre-adjusted to operate properly for an auto-switch-capable SMC rotary actuator.
If the auto switch is mounted improperly, used for another brand of rotary actuator or used after changing the
machine installation, the auto switch may not operate properly.
Load
>

前付 13
Mounting / Adjustment
(1) Do not drop or bump.
Do not drop, bump or apply excessive impacts (300m/s2 or more for reed auto switches and 1000m/s2 or more
for solid state auto switches) while handling. Although the body of the auto switch may not be damaged, the
inside of the auto switch could be damaged and cause malfunction.
(2) Observe the proper tightening torque for mounting an auto switch.
When an auto switch is tightened beyond the range of tightening torque, auto switch mounting screws, auto
switch mounting brackets or auto switch may be damaged.
On the other hand, tightening below the range of tightening torque may allow the auto switch to slip out of
position.
(3) Do not carry a rotary actuator by the auto switch lead wires.
Never carry a rotary actuator by its lead wires. This may not only cause broken lead wires, but it may cause
internal elements of the auto switch to be damaged by the stress.
(4) Fix the auto switch using the appropriate screws on the switch body. If other screws are used, the auto
switch may be damaged.
Wiring
(1) Confirm proper insulation of wiring.
Be certain that there is no faulty wiring insulation (contact with other circuits, ground fault, improper insulation
between terminals, etc.). Damage may occur due to excess current flow into the auto switch.
(2) Do not wire with power lines or high voltage lines.
Wire separately from power lines or high voltage lines, avoiding parallel wiring or wiring in the same conduit
with these lines. Control circuits containing auto switches may malfunction due to noise from these other lines.
(3) Avoid repeatedly bending or stretching lead wires.
Broken lead wires will result from repeatedly applying bending stress or stretching forces to the lead wires.
Stress and tensile force applied to the connection between the cable and auto switch increases the possibility
of disconnection.
Fix the cable in the middle so that it is not movable in the area where it connects with the auto switch.
(4) Be certain to connect the load before power is applied.
<2-wire type>
If the power is turned ON when an auto switch is not connected to a load, the auto switch will be instantly
damaged because of excess current (Short circuit).
It is the same as when the 2-wire brown lead wire (+, output) is directly connected to the (+) power supply
terminal.
(5) Do not allow short-circuit of loads.
<Reed>
If the power is turned ON with a load in a short circuit condition, the switch will be instantly damaged because
of excess current flow into the switch.
<Solid state>
PNP output type auto switches do not have built-in short circuit prevention circuits.
If a load is short circuited, the auto switch will be instantly damaged as in the case of reed auto switches.
Take special care to avoid reverse wiring with the brown power supply line and the black output line on 3-wire
type auto switches.
Caution
Caution

前付 14
(6) Avoid incorrect wiring.
<Reed>
A 24 VDC auto switch with indicator light has polarity. The brown lead wire or terminal No.1 is (+), and the blue
lead wire or terminal No.2 is (-).
1) If connections are reversed, the auto switch will operate, however, the LED will not light up.
Also, take note that a current greater than that specified will damage the LED and it will no longer operate.
Applicable models: D-93, A93V
<Solid state>
1) If connections are reversed on a 2-wire type auto switch, the auto switch will not be damaged if protected by
a protection circuit, but the auto switch will always stay in an ON state. However, it is still necessary to avoid
reversed connections, since the auto switch could be damaged by a load short circuit in this condition.
2) If connections are reversed (power supply line + and power supply line-) on a 3-wire type auto switch, the
auto switch will be protected by a protection circuit. However, if the power supply line (+) is connected to the
blue wire and the power supply line (-) is connected to the black wire, the auto switch will be damaged.
When the cable sheath is stripped, confirm the stripping direction. The insulator may be split or damaged
depending on the direction. (D-M9□ only)
Operation Environment
(1) Never use in an atmosphere with explosive gases.
Auto switches are not designed with explosion-proof construction. Never use in an atmosphere containing
explosive gas since this may cause a serious explosion.
Please contact SMC concerting ATEX compliant products.
(1) Do not use in an area where a magnetic field is generated.
Auto switches will malfunction or magnets inside rotary actuator will become demagnetized. (Please consult
with SMC if a magnetic field resistant auto switch can be used.)
(2) Do not use in an environment where the auto switch will be continually exposed to water.
Although auto switches satisfy IEC standard IP67 construction (JIS C 0920: watertight construction), do not
use auto switches in applications where continually exposed to water splash or spray. Poor insulation or
swelling of the potting resin inside auto switches may cause malfunction.
Recommended Tool
Description
Model
Wire stripper
D-M9N-SWY
* Stripper for a round cable (
2.0) can
be used for a 2-wire type cable.
Warning
Caution

前付 15
(3) Do not use in an environment with oil or chemicals.
Please consult with SMC if auto switches will be used in an environment with coolant, cleaning solvent, various
oils or chemicals. If auto switches are used under these conditions for even a short time, they may be adversely
affected by improper insulation, malfunction due to swelling of the potting resin, or hardening of the lead wires.
(4) Do not use in an environment with temperature cycles.
Please consult with SMC if switches are used where there are temperature cycles other than normal
temperature changes, as there may be adverse effects inside the auto switches.
(5) Do not use in an environment where there is excessive impact shock.
<Reed>
When excessive impact (300m/s2 or more) is applied to a reed auto switch during operation, the contacts may
malfunction and generate or cut off a signal momentarily (1ms or less). Please consult with SMC if a solid
state auto switch can be used according to the environment.
(6) Do not use in an area where surges are generated.
<Solid state>
When there are units (solenoid lifter, high frequency induction furnace, motor, radio equipment etc.) which
generate a large amount of surge in the area around the rotary actuator with solid state auto switches, this
may cause deterioration or damage to the auto switch’s internal circuit elements. Avoid sources of surge
generation and crossed lines.
(7) Avoid accumulation of iron debris or close contact with magnetic substances.
When a large amount of iron debris such as machining chips or spatter is accumulated, or a magnetic substance
(something attracted by a magnet) is brought into close proximity with a rotary actuator with auto switches, or
a rotary actuator, it may cause the auto switch to malfunction due to a loss of the magnetic force inside the
rotary actuator.
(8) Please contact SMC concerning water resistance, elasticity of lead wires, usage at welding sites, etc.
(9) Do not use in direct sunlight.
(10) Do not mount the product in locations where it is exposed to radiant heat.
Maintenance
(1) Removal of equipment, and supply/exhaust of compressed air.
Before any machinery or equipment is removed, first ensure that the appropriate measures are in place to
prevent the fall or erratic movement of driven objects and equipment, then cut off the electric power and reduce
the pressure in the system to zero. Only then should you proceed with the removal of any machinery and
equipment.
When machinery is restarted, proceed with caution after confirming that appropriate measures are in place to
prevent actuators from moving suddenly.
(1) Perform the following maintenance periodically in order to prevent possible danger due to unexpected
auto switch malfunction.
1) Secure and tighten auto switch mounting screws.
If screws become loose or the mounting, position is dislocated, retighten them after readjusting the mounting
position.
2) Confirm that there is no damage to lead wires.
To prevent faulty insulation, replace auto switches or repair lead wires, etc., if damage is discovered.
3) Confirm the lighting of the green light on the 2-color indicator type auto switch.
Confirm that the green LED is on when stopped at the established position. If the red LED is on, the mounting
position is not appropriate. Readjust the mounting position until the green LED lights up.
Warning
Caution

1
1. Product Description
This manual describes the operation of the vane type compact rotary actuator,
CRB Series.
Confirm the operating conditions such as load size (inertial moment), rotating time, and the product
specifications before using this product.
How to Order
Specifications
Size
10
15
20
30
40
Rotating angle range
90°+5°/0
180°+5°/0
90°+4°/0
180°+4°/0
90°±10°
180°±10°
Fluid
Air (Non-lube)
Proof pressure [MPa]
1.05
1.5
Fluid temperature [oC]
5 to 60 oC
Max. operating pressure [MPa]
0.7
1.0
Min. operating pressure [MPa]
0.2
Speed adjustable range [s / 90o](Ｎote 2)
0.03 to 0.5 Note1)
0.04 to 0.5
0.07 to 0.5
Allowable kinetic energy [J]
0.00015
0.001
0.003
0.02
0.04
Shaft load
N
Radial
15
15
25
30
60
Thrust
10
10
20
25
40
Port size
M5 × 0.8
Note1) Size 10 requires at least 0.35 MPa of operating pressure to reach the minimum rotation time (0.03 s/90°).
Note2) Operate within the speed adjustable range.
Operation at a low speed outside of the speed adjustable limit may cause stick slip or operation failure.
It is difficult to make adjustments during use if rotation time is changed to 0.5 s/90° or lower.
Ｃ ＲＢ Ｓ ３０ －９０
ＣＤＲＢ Ｓ３０ －９０-Ｍ９Ｂ ＬＳ
With auto switch
①
②
③
④
⑤
⑥
⑦
① Built-in auto switch magnet
②Shaft type
S
Single shaft with single flat
(Sizes: 10 to 30)
Single shaft end key (Size: 40)
W
Double shaft with single flat
(Sizes: 10 to 30)
Long shaft end key, Short shaft with
single flat (Size: 40)
③ Size
10
15
20
30
40
④ Rotating angle
90
90°
180
180°
⑤ Auto switch
Nil
Without auto switch (Built-in magnet)
*For applicable auto switches, refer to the table below.
⑦ Number of auto switches
Nil
2
S
1
⑥Lead wire length
Nil
Grommet / Lead wire: 0.5 m
M
Grommet/Lead wire: 1 m
L
Grommet/Lead wire: 3 m
Z*
Grommet/Lead wire: 5 m
* The 5 m lead wire is produced upon
receipt of order.

2
Effective torque

3
Chamfered Position and Rotation Range: Top View from Long Shaft Side
Chamfered positions shown below illustrate the conditions of actuators
when B port is pressurized.
Note) The angle adjusting screw (adjustment bolt) is set at random within the adjustable rotating range.
Therefore, it must be re-adjusted to obtain the angle that suits your application. (Refer to page 11.)
For size 40 actuators, a parallel key will be used instead of chamfer.
Size
Recommended tightening torque for hexagon
nut to fix the adjustment bolt
20
1.5N・m
30,40
3.0 N・m