ENG_20293.XML
The 3SB2 pushbuttons and indicator lights are provided for front plate mounting and rear connection with flat connectors. For use on printed circuit boards, contact blocks and lampholders with solder pins are also available.
Standards
IEC 60947-1,
IEC 60947-5-1,
IEC 60947-5-5 for EMERGENCY STOP mushroom pushbuttons
Version with flat connector
G_NSD0_XX_00001
3SB2 pushbuttons and indicator lights
PCB mounting
For use on printed circuit boards, special contact blocks and lampholders for soldering into the printed circuit board are available. For this purpose, the contact blocks and lampholders are fitted with 0.8 mm x 0.8 mm solder pins of length 3.5 mm.
G_NSD0_XX_00010
3SB2 pushbuttons with solder pins
ENG_106199.XML
The devices are climate-proof and suitable for marine applications.
Safety EMERGENCY STOP according to ISO 13850
For controls according to IEC 60204‑1, the mushroom pushbuttons of the 3SB2 series are suitable for use as safety EMERGENCY STOP pushbuttons.
Safety circuits
Standard IEC 60947‑5‑1 requires positive opening of the NC contacts. In other words, for the purposes of personal safety, the assured opening of NC contacts is expressly stipulated for the electrical equipment of machines in all safety circuits and marked according to IEC 60947‑5‑1 with the symbol (→).
PL e according to ISO 13849‑1 can be attained with the EMERGENCY STOP mushroom pushbuttons if the corresponding fail-safe evaluation units are selected and correctly installed, e.g. the safety relays in the 3SK product family (see Safety technology) or matching units from the ASIsafe, SIMATIC or SINUMERIK product ranges.
ENG_879115.XML
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Type
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3SB2
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Contact blocks and lampholders
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Standards
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IEC 60947‑5‑1
IEC 60947‑5‑5
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Rated insulation voltage
U
i
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V
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250
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Conventional thermal current
I
th
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A
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10
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Rated operational current
I
e
at rated operational voltage Ue
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- Alternating current AC‑12
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A
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10
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- Alternating current AC‑15
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A
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4
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A
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6
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A
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5
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A
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2.5
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A
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1
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A
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3
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A
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1.5
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A
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0.7
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A
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0.3
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Contact reliability
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Test voltage/test current
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5 V/1 mA
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Lamps
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Wedge base W2 x 4.6 d
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V
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6, 12, 24, 30, 48, 60
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W
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1
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Short-circuit protection without any welds according to IEC 60947‑5‑1
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- DIAZED fuse links, utilization category gG
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10 A TDz, 16 A Dz
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- Miniature circuit breaker with C characteristic according to IEC 60898
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10 A
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Electrical endurance
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- For utilization category AC‑15 with 3RT contactors
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Operating cycles
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10 × 106
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Mechanical endurance
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Operating cycles
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10 × 106
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Degree of protection according to IEC 60529
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- Connection of contact blocks and lampholders behind the front plate
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IP00
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- Contact chambers of the contact blocks behind the front plate
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IP40
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Finger protection according to IEC 60529 and DGUV Regulation 3
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With voltages > 50 V AC or 120 V DC, insulating sleeves must be fitted to the unassigned flat connectors.
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Data according to UL and CSA
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Rated voltage
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V
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250 AC
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- Indicator lights (lamp with wedge base W2 x 4.6 d)
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V
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60; 1 W
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Uninterrupted current
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A
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5
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Switching capacity
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B 300, R 300
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Actuating and signaling elements
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Mechanical endurance
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Operating cycles
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10 x 106
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- Actuators, rotary or latching
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Operating cycles
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3 x 105
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Operating cycles
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3 x 106
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Climatic withstand capability
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Climate-proof; suitable for marine applications
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Ambient temperature
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- During operation, non-illuminated devices and complete with LED
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°C
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-25 ... +70
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- During operation, devices with incandescent lamp
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°C
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-25 ... +60
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- During storage, transport
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°C
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-40 ... +80
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Degree of protection according to IEC 60529
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IP65
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- Actuators and indicators with protective cap
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IP67
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Protective measures
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- For mounting in metal front plates and enclosures
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The actuators and lens assemblies must not be included in the protective measures.
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- For fitting into enclosures with total insulation
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The protective measure "Total insulation" is retained.
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Shock resistance according to IEC 60068‑2‑27
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g
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≤ 50
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ms
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11
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Half-sine
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Configuration
Design
Two design versions can be mounted:
- Round design: The 3SB2 pushbuttons and indicator lights consist of the actuator, holder, contact block and lampholders. Depending on the specific application, various versions can be assembled. Complete units are offered for the most commonly used applications.
- Square design: With square, black frames the round units can be given a square look. The frames are inserted underneath the round actuators. Further mounting is the same as for the round version.
Mounting and fixing:
Mounting dimensions according to EN 50007 (does not apply to EMERGENCY STOP mushroom pushbuttons)
G_NSD0_XX_00002
For mounting, the actuator or the lens assembly is inserted from the front into the hole in the front plate. Four small nubs ensure a secure fitting in the hole. The holder is plugged on from the back and snaps automatically into place. The module is fixed to the holder with two screws so that it is immune to vibrations.
One or two contact blocks can be mounted on the holder. They are inserted into the holder with slide slots and held down with two snap brackets.
G_NSD0_XX_00140
Pushbutton (flat) with holder and contact block
If a command point is fitted with an indicator light or illuminated pushbutton, a lamp socket with lampholder must be used instead of a holder. It is suitable for incandescent lamps or LEDs with bases of type W2 x 4.6 d.
PCB mounting
The command point comprises the actuator, e.g. 3SB2 pushbutton, illuminated pushbutton or indicator light, which is mounted in the front plate, as well as contact blocks and lampholders, which are soldered into the printed circuit board. For this purpose, the contact blocks and lampholders are fitted with 0.8 mm x 0.8 mm solder pins of length 3.5 mm.
Mounting and fixing:
Mounting dimensions according to EN 50007
The actuators are mounted in the same way as 3SB2 front plate mounting devices.
The contact blocks and lampholders are plugged into the printed circuit board by means of their solder pins and can be flow-soldered. After soldering, the devices must be flush with the board and perpendicular to it. The printed circuit board must be supported on spacing bolts so that it cannot sag or bend more than 0.1 mm.
G_NSD0_XX_00011
Illuminated pushbutton with solder pin connection
To avoid bending the PCB when the command device is operated, sufficient spacing bolts must be provided as shown in the table below:
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PCB thickness
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Max. distance between spacing bolts
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1.5 mm
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80 mm
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2.5 mm
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150 mm
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When using EMERGENCY STOP pushbuttons
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Always 50 mm
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These details are based on printed circuit boards made of epoxy resin glass fiber mat.
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G_NSD0_XX_00012
Solder pin spacing
