Datasheet
3SB3 Pushbuttons and Indicator Lights, 22 mm
13/21
Siemens IC 10 · 2012
General data
13
Design
The 3SB3 series is a modular range of commanding and signal-
ing devices for front panel mounting and rear conductor connec-
tion. As an alternative, individual elements can also be supplied
for use on printed circuit boards. Complete units are offered for
the most commonly used applications.
Actuators and indicators and complete units
The 3SB3 series is available:
• Made of molded plastic in flat, round and square design
• Made of metal in round design.
The devices are of modern industrial design and can be
mounted rapidly by a single person. The operating surfaces of
the pushbuttons and illuminated pushbuttons are concave. The
lenses of the indicator lights are convex.
The metal version with a high degree of protection according to
IP67 and NEMA 4 is available for the world market.
One command point comprises:
• An actuator or lens assembly in front of the control panel
• A holder for mounting behind the control panel
• Up to 3 contact blocks and/or 1 lampholder behind the control
panel
• A comprehensive range of accessories for inscription
Two contact blocks can be snapped onto the actuator in the
standard version.
When three contact blocks or illuminated actuators are required,
an additional holder must be plugged onto the actuator from the
rear.
• 3SB39 01-0AB holder for 3 contact blocks or for 2 contact
blocks and 1 lampholder
• 3SB39 01-0AC holder with pressure plates for actuating a
central contact block when using a selector switch, key-oper-
ated switch and twin pushbutton with 3 contact blocks.
For illuminated pushbuttons, illuminated switches and illumi-
nated selector switches the holder is included in the scope of
supply as standard.
The contact blocks are fitted with slow-action contacts with dou-
ble operating contacts. These ensure a high switching reliability
even with small voltages and currents, such as 5 V/1 mA. They
are suitable for use in solid-state systems as well as conven-
tional controls.
Standards
IEC 60947-1, EN 60947-1,
IEC 60947-5-1, EN 60947-5-1,
IEC 60947-5-5, EN 60947-5-5 for EMERGENCY-STOP mush-
room pushbuttons.
Connection methods
The devices are available with screw terminals (box terminals),
spring-type terminals or solder pins.
■
Application
The devices are climate-proof (KTW 24) and suitable for stan-
dard industrial applications and operation in marine applica-
tions. For operation in oily atmospheres (organic oils/lubricants)
we recommend actuators which are marked as "solvent-resis-
tant".
AS-Interface solutions
The 3SB3 commanding and signaling devices can be con-
nected to the AS-Interface communication system quickly and
safely with the help of various solutions.
The following solutions are available:
• ASIsafe EMERGENCY-STOP mushroom pushbuttons
(see page 13/67)
• AS-Interface enclosures with 1 to 6 command points
(see page 13/96).
• AS-Interface front panel modules for 4 command points
(see Catalog IK PI)
"Intrinsic safety" type of protection EEx i according to
ATEX directive 94/9/EC
The pushbuttons and indicator lights in round design can also
be used in hazardous areas. The 3SB34 ..-0. contact blocks and
the 3SB34 ..-1A lampholders (with 3SB39 01-1.A LED lamp) with
screw terminals or spring-type terminals can be used.
See www.siemens.com/sirius/atex.
Safety EMERGENCY-STOP pushbuttons according to
ISO 13850
For controls according to IEC 60204-1 or EN 60204-1, the mush-
room pushbuttons of the 3SB3 series are suitable for use as
safety EMERGENCY-STOP pushbuttons.
Safety circuits
IEC 60947-5-1 and EN 60947-5-1 require positive opening,
i.e. 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
q.
Category 4 according to EN 954-1 can be attained with the
EMERGENCY-STOP mushroom pushbuttons if the correspond-
ing failsafe evaluation units are selected and correctly installed,
e.g. the 3TK28 safety relays or matching units from the ASIsafe,
SIMATIC or SINUMERIK product ranges.
Screw terminals
Spring-type terminals
Solder pin connections
The terminals are indicated in the corresponding ta-
bles by the symbols shown on orange backgrounds.
IC10_13.book Seite 21 Donnerstag, 19. Januar 2012 2:24 14
© Siemens AG 2012