Siemens SIRIUS 3SB3 Operating Instructions Manual page 4

Control devices, pushbuttons and indicator lights
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Control Devices, Pushbuttons and Indicator Lights
Operating Instructions
Read and understand these instructions before installing,
operating, or maintaining the equipment.
Hazardous voltage.
Will cause death or serious injury.
Turn off and lock out all power supplying this device before
working on this device.
Reliable functioning of the equipment is only ensured with
certified components.
No special tools are required for mounting and removing the products of the
SIRIUS series. (Exception: pushbuttons with extended stroke: 3SX1707 assem-
bly spanner required for ring nuts). The 3SB3921-0BC assembly tool is required
for removal of the covering caps for all metal actuators and indicators and for
indicators made of plastic material.
The lighting elements can be accessed and replaced by removing the covering
caps. In the case of lampholders with an integrated LED, the lighting element
cannot be replaced separately.
The contact blocks and lampholders are snapped on by means of a knuckle
Minimum clearances and diameters of the drilled holes or cutouts, Fig. I
a) 3SB3 round range
b) Hole pattern for illuminatable backing plate
c) 3SB3 square range
1. For contact blocks with one contact - screw terminals
2. For contact blocks with two contacts
3. For contact blocks with solder connection and for contact blocks with one
contact - spring-loaded terminal
4. When using label holders for inscription plate 12.5 mm x 27 mm
5. When using label holders for inscription plate 27 mm x 27 mm
For mushroom pushbuttons, push-pull buttons and EMERGENCY-STOP actua-
tors please observe the mushroom diameters of D = 32 mm, D = 40 mm or
D = 60 mm.
Observe outer diameter D=60 mm for illuminatable backing plates.
Front plate mounting, Fig. II
Round range:
front plate thickness 1 to 6 mm
Square range:
front plate thickness 1 to 4 mm
A) Actuator
B) Inscription plate
C) Label holder
D) Front plate
E) Holder with fixing screw
F) Contact block
Use on printed-circuit board, Fig. IIIa
Clearances of solder pins and hole diameter, Fig. IIIb
A) Actuator
B) Front plate
C) Holder
D) Printed-circuit board holder
E) Lampholder
F) Contact block
G) Printed-circuit board
H) Solder connection ø 1.3 + 0.1 mm
I) Mounting hole ø 3 + 0.2 mm
J) Centring hole ø 4.2 + 0.1 mm
K) Fixing screw ø 3 x 10 to DIN EN ISO 1478
Assignment of sequence numbers and function numbers, Fig. IV
a) 1-pole contact blocks
b) 2-pole contact blocks
The terminals are numbered as follows: NO contacts .3 and .4, NC contacts .1
and .2, and lampholders X1 and X2.
IEC / EN 60947-5-1 (VDE 0660, Part 200), IEC / EN 60947-5-5
Mounting the holder, Fig. Va, b
The holder for round actuators can be used for two ranges of front plate thick-
nesses. As delivered, the holder is set to the thickness of 1 to 4 mm, Fig. Va and
is mounted from behind onto the actuator / indicator in the direction of the arrow
x 1 - 4 mm x. The fixing screw is located underneath, on the right.
For a front plate thickness of 3 to 6 mm the holder is reversed and mounted in
the direction of the arrow x 3 - 6 mm x. In this case the fixing screw must be
turned anti-clockwise to the stop before the holder is put in place, Fig. Vb.
Square actuators can be mounted in 1 to 4 mm switchboards.
When using label holders, protective covers or similar accessories, the maxi-
mum permissible thickness of the front panel must be reduced by the thickness
of the accessory.
Mounting the contact blocks and lampholders, Fig. VI
The contact block is positioned at the rear of the actuator and pressed onto the
rear to snap into place, Fig. VIa. Without accessories, a maximum of two con-
tact blocks or one lampholder can be mounted.
If three contact blocks or one lampholder and one / two contact block(s) are
required, the holder must be mounted on the actuator before the contact blocks
are snapped on, Fig. VIb.
The holder is included in the scope of delivery with all illuminated actuators (with
the exception of indicators). When mounting three contact blocks with a selector
switch, lock and twin pusbuttons, an expansion adaptor equipped with two pres-
sure supports is required (not supplied). Depending on the switching configura-
tion of the middle contact block, it may be possible to remove the pressure
supports. Pressure supports being used are secured using the slides on the
actuator. Fig. VIc. To disassemble the contact blocks, use a screwdriver to
press on the knuckle joint of the contact block, Fig. VId.
Connection of the conductors to contact blocks with spring-loaded termi-
nal connections, Fig. VII
Mounting the lamp transformer, Fig. VIIIa
The transformer is snapped onto a BA9s lampholder with screw terminals. The
terminals of the lampholder must be tightened. In addition to the lampholder, two
1-pole contact blocks with screw terminals can be fitted. To remove the trans-
former, the snap hooks on the lamp transformer must be released from the lam-
pholder with a screwdriver, Fig. VIIIb.
Replacing lamps, Fig. IX
Lighting elements can be replaced from the front without disassembling the con-
trol device (exception: lampholder with integrated LED. The LED is permanently
fixed in the mount). To do this, the handle of the actuators / indicators must be
removed first, Figs. IXa to h.
For lamp replacement see Fig. i and j.
a) Indicator light, round
b) Indicator light, square
c) Illuminated pushbutton / switch, plastic
d) Illuminated pushbutton / switch, metal
e) Twin pushbutton, illuminated
f) Mushroom pushbutton / push-pull button, illuminated
g) Selector switch, illuminated, plastic
h) Selector switch, illuminated, metal
i) Removal of the lamp with lamp extractor (accessory)
j) Installation of the lamp with lamp extractor (accessory)
Mounting the insert labels (accessory), Fig. IXc / d
The insert label is inserted between the cap A and button B.
Insert labels can only be used with illuminated pushbuttons and illuminated
pushbutton switches.
Lock with key control
The enclosed 3SB3901-0AB holder should be used for the lock with key control.
The key is queried by means of a single-pole 3SB3 NC contact block which is
snapped into the center position.
The switch positions must be queried via other 3SB3 contact blocks snapped
onto the actuator.
The key must be manually repositioned to zero.
Monitored contact block
The monitored 3SB3400-0M (screw connection) and 3SB3403-0M (spring-loaded
connection) contact blocks are NC contact blocks with positive opening. The NC
contact opens automatically when the contact block is released by the actuator. The
contact is open (safe status) when delivered. Activation (= NC contacts closed with
non-actuated control device) occurs during the first actuation after the contact block
has been snapped on.
Order No.: 3ZX1012-0SB30-1AA1


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