When ordering spare parts, specify complete catalog number of
Rotating Cam Limit Switch
|
| ITEM |
DESCRIPTION |
QTY. |
PART NUMBER |
| |
|
|
|
| 1 |
ENCLOSURE (Ref Fig. #1-3 for NEMA Style) |
1 |
Specify Catalog No. |
| 2 |
COVER (Ref Fig. #1-3 for NEMA stle) |
1 |
Specify Catalog No. |
| 3 |
ROLL PIN (1/8" x 1") |
As Req'd |
04564001 |
| 4 |
CAM SHAFT |
1 |
Specify Catalog No. |
| 5 |
SWITCH SUPPORT BRACKET |
2 |
C0185400 |
| 6 |
WOODRUFF KEY #606 |
1 |
04564002 |
| 7 |
DECAL DRIVE MECHANISM |
1 |
NP0011300 |
| 8 |
FLANGE BEARING-NEMA 1, 4, 12 (3/4") |
2 |
04570001 |
| 9 |
CAM ASSEMBLY (1 per circuit) |
As Req'd |
SD0117800 |
| 10 |
CONDUIT PLUG (NEMA 1) |
1 |
Specify Catalog No. |
| * 11 |
INSTRUCTION LABEL (Inside Cover) |
1 |
NP0067700 |
| * 12 |
INSTRUCTION SHEET |
1 |
NP0067600 |
| 13 |
NAMEPLATE |
1 |
NP0010900 |
| 14 |
PAN HEAD MACHINE SCREW (#6-32 X 1") |
As Req'd |
04560001 |
| 15 |
ADJUSTING STICK |
1 |
P0034600 |
| • 16 |
SNAP SWITCH S.P.D.T. See Sect. 1950
D.P.D.T. |
As Req'd |
1950-1-B-A-AO
1950-4-B-A-AO |
| • 17 |
SNAP SWITCH S.P.D.T. See Sect. 1950
w/RUBBER BOOT D.P.D.T. |
As Req'd |
1950-1-B-A-AR
1950-4-B-A-AR |
| 18 |
COVER LATCH ASS'Y. (NEMA 4) See Fig. #2 |
As Req'd |
Specify Catalog No. |
| 19 |
COVER CAPTIVE SCREW (NEMA 12) See Fig. #3 |
As Req'd |
SD0169600 |
| 20 |
SNAP SWITCH BRACKET |
1 |
Specify Catalog No. |
| 21 |
ROLLER FOLLOWER |
As Req'd |
SD0157100 |
| 22 |
HEX BOLT 5/16-18 X 5/8" w/LOCK WASHER |
6 |
04560003 |
| * 23 |
CENTER BEARING ASSEMBLY (13+ Circuit) |
1 |
SD0119500 |
| * 24 |
CONDUIT FITTING (NEMA 4 & 12) See Figs. #2 & #3 |
1 |
Specify Catalog No. |
| 25 |
PAN HEAD MACHINE SCREW w/SEMS WASHER
(#10-32 X 3/8") |
As Req'd |
04560002 |
| * Item not shown on drawing |
| • It is recommended that snap switches be replaced after fifteen million operations. |
ELECTRICAL CONTACTS
The welded silver cadmium oxide contacts provide the following advantages:
(1) High electrical conductivity. (2) Excellent resistance to sticking
contacts, (3) Minimum electrical erosion. The presence of cadmium oxide
gives high arc quenching characteristics of cadmium without a reduction of
high conductivity of fine silver. This is because the cadmium oxide remains
as discrete particles throughout the silver base and each exhibits its own
physical characteristics.
|
| ELECTRICAL CONTACT RATINGS |
|---|
| Switch Type |
Contacts |
Volts |
AC |
Volts |
DC |
Inductive
Pilot Duty 35% Power Factor |
Inductive Pilot Duty and Resistive |
| Make |
Break |
Continuous Carrying Amperes |
Make, Break and Continuous Carrying Amperes |
Make and Break Amperes |
Continuous Carrying Amps |
| Amps. |
VA |
Amps. |
VA |
Double Throw |
| 1950-4 |
DPDT |
115
230
440
575
|
30
15
7.5
6
|
3450
3450
3450
3450
|
3
1.5
0.75
0.6
|
345
345
345
345
|
10
10
10
10
|
10
10
10
10
|
115
230
600
|
0.2
0.1
----
|
10
10
10
|
| 1950-1 |
SPDT |
110
220
440
600
|
40
20
10
8
|
----
----
----
----
|
15
10
6
5
|
----
----
----
----
|
15
15
15
15
|
15
15
15
15
|
115
230
600
|
0.25
0.1
----
|
15
15
15
|
|
APPLICATION NOTE
The N.O. and N.C contacts of the single pole, double throw snap on circuits
of the same snap switch has two poles, which can be used on opposite polarities.
The N.O. and N.C. circuit of each pole of the two pole snap switch, however,
must be used on the same polarity.
|
|
MOUNTING OF UNIT
Mount the assembly and couple the input shaft to the driving member,
with the shaft keyway up and in line with the positioning arrow on the
bearing end plate. The machine should be in the start cycle position.
ESTABLISHING CAM SHAFT DIRECTION OF ROTATION
Cam settings should be made with the cam shaft uppermost to the viewer.
The picture at the top illustrates this viewing position and also shows
the adjusting tool being applied to the adjusting wheel. Shaft rotation
is always established off the right end of the unit even when the input
shaft, whether direct or through a gear reducer, is situated at the left
end. As an aid to designating shaft rotation when gear reducer is used,
consult page 10 of the 1980 Catalog Section.
CAM SETTINGS
For clockwise rotation, set "make" angle with the black dial
and "break" with the red dial for dwell settings less than
180° or greater. Reverse colors for dwells greater than 180°
For counterclockwise rotation, set "make" angle with the white
dial and "break" with the yellow dial. Reverse colors for dwells
greater than 180°
Switch connections should be made in accordance with the illustrations to
the right, which, incidentally, are both clockwise rotating examples.
|
|
|
