E30KLA1 EATON CUTLER HAMMER, E30KLA1 Datasheet - Page 233

• Manufacturer Part Number: E30KLA1
• Description: SWITCHING ELEMENT, 1NO, 10A, SCREW
• Manufacturer: EATON CUTLER HAMMER

Specifications of E30KLA1

• No. Of Poles: 1
• Contact Current Max: 10A
• Contact Voltage Ac Max: 600V
• Contact Voltage Dc Max: 250V
• Switch Terminals: Screw
• Circuitry: SPST-NO
• For Use With: E30 Series Pushbuttons & Indicating Lights

Step 3: Cam Selection.
The cam you select
determines the operation of
all contact blocks mounted to
the operator. It is selected on
the basis that it provides the
simplest circuitry for the
desired “X-O” diagram. The
selection tables show all the
“X-O” combinations. For the
purpose of this example, the
applicable portion of those
tables is shown on this page.
Now to make the cam
selection, make a simple
worksheet such as:
X O O
O O X
It becomes immediately
obvious that cam 3 is the
better choice for two
reasons, (1) the series
combination can be avoided
making it simpler to wire,
(2) only two contacts are
required, which is less
expensive than the three
contacts required by cam 2.
Step 4: Contact Block
Selection.
Having selected the cam,
contact block selection is
simply a matter of gathering
the A position and B position
circuits into pairs which make
up the most convenient contact
block arrangement. If there is
an imbalance in the number of
circuits under A or B, then
single circuit blocks must be
selected for these leftover
circuits.
Back to the worksheet,
having selected cam 3 do
this:
X O X
O O X
ANO
(A)NO-(B)NC
Cam 2
(B)NO
BNO
10250T2
Cam 3
(A)NO
(B)NO
Step 5: Selector Switch
Operator.
Lastly, you have to choose
from the many types of
operators—knob and lever in
various colors or keyed. Also
what combinations of
maintained and spring return
functions are required.
Selection of these operators
can be found on Page 235.
For the example in step 4,
you may want a three-
position maintained black
knob, cam 3—Catalog
Number E34VHBK1.
The Complete Switch:
E34VHBK1 with one
10250T2 or, for one
composite catalog number,
E34VHBK1-Y1 found on
Page 232.
Diagrams
Circuits shown illustrate
connections to obtain a
selector switch circuit
combination and are shown
with their appropriate line
diagrams. Field wiring of
jumper connections required
as shown.
X = Closed circuit
O = Open circuit
Wiring of Jumper
Connections
Series Connection
Parallel Connection
Four-position selector
switches are limited to four
contact blocks.
Contact Blocks
For selection and number of
available contact blocks per
operator, see Page 244.
30.5 mm Corrosion Resistant Watertight/Oiltight—E34
Pushbuttons and Indicating Lights
Control Products Catalog CA08102001E—August 2010 www.eaton.com
Example Selection Table
No.
1
4
Two-Position Selector Switch Contact Block Selection
No.
1
2
Note
Wired in series.
“X-O” Pattern
X
O
Desired Circuit and
Operator Position
X
O
O
O
O
X
O
X
Cam Code #2
Top A
NO
—
Contact Blocks Required to
Accomplish Circuit Function
Top Plunger A
NC
NO
Bottom B
NO
NC
or
or
Cam Code #3
Top A
NO
—
Bottom Plunger B
NC
NO
47.7
Bottom B
—
NO
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