Description
31
General Notes
The series 31 illuminated pushbuttons are equipped with snap-action
or low-level switching elements.
Besides the standard contacts (gold-plated silver) silver contacts for
switching elements 2.8 mm plug-in terminals can be supplied on re-
quest.
The front dimensions of these units are 18 x 24 mm or 18 mm dia.
In addition to a number of illuminated pushbuttons, the customer can
choose from a range of other units and accessories having the same
front and mounting dimensions: indicators, flashers, buzzers, etc.
(For keylock switches see series 51 or 61.)
Number structure
31-XXX.OXX
Type of terminals
Contact material
Switch variant
31-9XX.X
Example:
Lens
-Illuminated pushbutton, round, with
momentary action; gold-plated silver
contact;
1 switching element
31-131.025
-Lens, red
31-933.2
31
Mounting
Mount from the front through the mounting hole.
The universal terminals of the low-level switching elements permit
mounting on printed circuit boards (PCB).
These terminals are also suitable for dip soldering. For these termi-
nals we can also supply a plug-in base which, when soldered on to
the board, enables the switch to be plugged in. All rectangular swit-
ches, as well as the square and round keylock switches are secured
against rotation.
Specimen order
Indicator
- indicator, soldering terminal,
18 x 24 mm
Recommended accessories:
- lens, blue, 18 x 24 mm
- LED, 1 chip, 24 VDC, white
31-040.005
31-903-6
10-2312.3139
Lenses
The flat or concave lenses, made of polymethyl methacrylate, are
available in various colours, as well as translucent or transparent.
Marking
For engravings, hot stamping and film inserts, see under “Marking”
on page 58.
Illumination
Perfect illumination of the different coloured lenses is assured by mid-
get-grooved lamps T 1 3/4 (6-60 V).
For supply voltages above 60 V, it is necessary to use a voltage re-
duction element (external series resistor, capacitor or transformer).
Do not solder the terminals directly, because of the high surface tem-
perature.
Multi-LED midget-grooved lamps T 1 3/4 (6, 12, 24, 48 V) are availa-
ble in the colours red, white, yellow and green.
Position Indication
When a switch with maintained action is actuated, the lens remains
in the depressed position mechanically. The state of the switch is ap-
parent at all times from the position of the lens.
All dimensions in mm.
We reserve the right to modify technical data.
37
01.2000
Pushbuttons for Standard Mounting
buzzer
31
recommended accessories:
-
mounting dimension
connection method
a
18 x 24 mm
part no.
31-801.002
31-810.005
technical drawing
31
circuit drawing
buzzer
with continous and intermittent tone
operation voltage
10-26 VDC
10-55 VAC/10-75 VDC
front cap
plastic black
plastic black
e
0,015
0,015
ST/
PT
ST
1
2
1
2
1
1
connection method: ST = soldering terminal; PT = plug-in terminal; PCB plug-in base page
technical drawing as of page 51, mounting dimensions as of page 53, circuit drawing as of page 55
indicator
recommended accessories:
d
lens
→
41
d
incandescent lamp
→
44; LED
→
45
mounting dimension
connection method
components layout
-
-
1
1
1
technical drawing
diode (1N 4007)
a
18 x 24 mm
part no.
31-040.002
31-040.005
31-041.006
31-701.006
31-702.006
b
18 x 18 mm
part no.
31-050.002
31-050.005
31-051.006
31-703.006
31-704.006
18 mm dia.
part no.
31-030.002
31-030.005
31-031.006
31-741.006
31-742.006
circuit drawing
e
0,004
0,004
0,005
0,006
0,006
indicator
-
1
2
ST/
PT
ST
UT
UT
UT
3
4
3
5
6
3
3
5
4
4
1
1
1
1
1
connection method: ST = soldering terminal; PT = plug-in terminal; UT = universal terminal; PCB plug-in base page 43
marking see page 58
technical drawing as of page 51, mounting dimensions as of page 53, components layouts as of page 54, circuit drawing as of page 55
39
01.2000
Wireless Connectivity
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