Cut Sheet

Volume 7—Logic Control, Operator Interface and Connectivity Solutions CA08100008E—June 2015 www.eaton.com V7-T1-347
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1.11
Pushbuttons and Indicating Lights
30.5 mm Class I Division 2 Hazardous Locations—10250T/E34
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 below.
(1) or (2) = mounting location
from chart above:
It becomes obvious that
cam 3 is the better choice
because the series
connection can be avoided,
making it simpler to wire.
Step 4: Contact Block
Selection.
Having selected the cam,
contact block selection is
simply a matter of determining
if you require one NO-NC
contact block (Cat. No
10250T1H) or two. Given the
limitations of the factory
sealed contact block and the
desired “X-O” application,
you may have circuits that
will not be needed—as seen
here with the two additional
NC circuits. (1) or (2) =
mounting location from chart
above.
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 V7-T1-349. For the
example in step 4, you may
want a three-position
maintained black knob,
cam 3—Catalog Number
10250T1323 (or 34VHBK1).
The Complete Switch:
10250T1323 (or 34VHBK1)
with two 10250T1H or for
one composite catalog
number—10250T726BK (or
E34EX726BK) found on
Page V7-T1-344.
Diagrams
Circuits shown illustrate
connections to obtain a
selector circuit combination
and are shown with their
appropriate line diagrams in
BOLD. Field wiring of jumper
connections required as
shown.
X = Closed circuit
O = Open circuit
Cam 2 Cam 3
X O O
O O X
(1)NO-(2)NC
(2)NO
(1)NO
(2)NO
1
Qty Catalog No. Cam 3
2 10250TIH (1)NO (2)NC
(1)NC (2)NO
Example Selection Table
Note
1
Wired in series.
No.
Desired Circuit and
Operator Position
Cam Code #2
Contact Blocks and
Mounting Location
Cam Code #3
Contact Blocks and
Mounting Location
1212
1XOO
NO NC
1
NO
—
4 OOX—
NO
—
NO