SMCD SERIES MINIATURE PUSHWHEEL SWITCHES
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
FEATURES
Miniature pushwheel switches with large visible readout characters.
Models available with ESD protection - consult factory.
Bi-directional snap action detent pushbutton mechanism.
Black housing and drum with white printing.
Gangable front and rear mounting models with spacers and side covers.
Gold wiping action contacts.
P.C. board options include solderable lands.
SMCD SPECIFICATIONS
Panel mounting hole:
Height
Width
Installed depth with p.c. board:
Short
Long
Insertion from front
Insertion from rear
CODES
Code
positions marking
111 Decimal
10
0-9
131 BCD
10
0-9
137 BCD comp
10
0-9
301 Hexadecimal 16 0-9, A-F(0-15)
400 change-over
10
+,-,+,-,etc..
ELECTRICAL DATA
Operating voltage:
Contact load, static:
Contact load, dynamic:
Contact resistance (type AK):
TECHNICAL DATA
Operating temperature range:
Electric life, min. switching cycles
Actuation force, approx (oz.):
Weight, approx. (grams):
Character height:
10 digit
16 digit
Audible click
Vibration DIN IEC 68, parts 2-6
Shock DIN 40046, part 7
-20°C to 80°C
1,000,000
14
4
.193" (4.9mm)
.134" (3.4mm)
yes
yes
yes
40 V max.
1 A max.
100 mA max.
less than 100 mOhm
see truth tables
see truth tables
see truth tables
see truth tables
see truth tables
STANDARD COLORS
Housing,Drum,Printing
2 = black 3 = white
.945"(24mm)
.315"(8mm)
1.260"(32mm)
1.654"(42mm)
yes
yes
MATERIALS
Body:
PC board:
PPO
FR 4 DIN 40802
IEC 249-2, Contact
surface gold over
nickel on copper
Gold over nickel
on copper alloy
Sliding contact:
2,2,3
T
Other special features are available upon
request including:
Factory or customer set stops (10 digit models)
L.E.D. illumination (transparent wheel)
Red digits
Decimal point
Special codes or printing
Gray housing
See sockets at end of Pushwheel section.
APEM
, 63 NECK ROAD, HAVERHILL, MA USA 01835-0788 TOLL FREE: (877) 246-7890 FAX: (978) 372-3534 E-mail: info@apem.com
T1
SMCD SERIES MINIATURE PUSHWHEEL SWITCHES
TRUTH TABLES
CODE 131
BCD
C 1 2 4 8
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
CODE 137
BCD COMP.
C 1 2 4 8
+
-
+
-
+
-
+
-
+
-
CODE 400
CHANGE-OVER
C
A+
A-
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
CODE 301
HEXADECIMAL
1 2 4 8 C
0
1
2
3
4
5
6
7
8
9
CODE 111
DECIMAL
C 0 1 2 3 4 5 6 7 8 9
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
MECHANICAL OUTLINE WITH PANEL CUT-OUT & MOUNTING
n = number of switches
PIN CONNECTIONS
T
The
switching
mode is
shorting
- i.e. -
even during
actuation, at
least one
output is
connected
to input C.
"bl" is used
for models ordered
with L.E.D.
illumination
only.
T2
131
1
2
131bl
+ 1 8
137
1
2
137bl
+ 1 2
301
1
2
301bl
+ 1 2
400
+
A+
4
4
4
4
4
4
C
8
C
2 C -
8
C
8 C -
8
C
8 C -
A-
-
111
0 1 2 3 4 C 5 6 7 8 9
Pitch .079"(2mm)
AK
111bl
+ 0 1 2 3 4 C 5 6 7 8 9 -
Pitch .067"(1.7mm)
+
-
AL
111bl
0 1 2 3 4 C 5 6 7 8 9
Pitch .079"(2mm)
131
301
1 2 4 8 C
1 2 4 8 C
APEM
, 63 NECK ROAD, HAVERHILL, MA USA 01835-0788 TOLL FREE: (877) 246-7890 FAX: (978) 372-3534 E-mail: info@apem.com
SMCD SERIES MINIATURE PUSHWHEEL SWITCHES
PRINTED CIRCUIT OPTIONS
P.C. boards have .039" (1mm) holes and are suitable for soldering or socket connection (with the exception of LED
illumination option).
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
AK
short p.c. board
AL
long p.c. board
Allows customer to add
resistors, diodes, ect.
ALU
long p.c. board
LS
p.c. board w/solder pins
Ordering information:
Below is an order format that enables you to 'build your own switch' and specify the correct switch model
number by simply selecting from available options shown and filling in the boxes. Consult factory for fully assembled switches.
'BUILD YOUR OWN SWITCH' ORDER FORMAT
Series model
S
M C D
1
1
1
3
4
1
3
3
0
0
1
1
7
1
0
Decimal
BCD
BCD comp.
Hexadecimal.
Change-over
A K
Short
A L
Long
A L U
Long (rt. angle)
(NONE)
L S
with p.c.
solder pins
Code
P.C. board
Terminations
Standard colors
2
Black housing.
& drum, white
lettering.
Example of complete model no.: SMCD137ALLS2
Order SP12 as a separate line item for limit stop
pin (for 10 position models only).
ACCESSORIES
Order separately
SMCL2
Dummy switches
- These are empty plastic housings with the same dimensions as SMCD model (see outline). Use to fill hole
where switch is not needed.
SMCRD2 & SMCRND2
switches for rear mounting available on request.
T
SMCL2
Dummy housing
SMCPK2
Pair of side covers
SMCA2
Spacer
SMCRL2
Dummy housing
SMCPKH2
Pair of side covers
SMCAH2
Spacer
T3
APEM
, 63 NECK ROAD, HAVERHILL, MA USA 01835-0788 TOLL FREE: (877) 246-7890 FAX: (978) 372-3534 E-mail: info@apem.com
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