page 2
0° - 180°
Light
Energized
SWITCH
MODE
ENERGIZED
BY
ON
TIME
EXAMPLE
CAM SETTINGS
170°
135°
45°
7°
"0"
"0"
"0"
"0"
Photocoupler
Light Beam
-PASSING-
Fully
Adjustable
1° to 180°
From
45° to 180°
ON for 135°
From
0° to 170°
ON for 170°
From
90° to 135°
ON for 45°
From
312° to 322°
ON for 7°
From
322° to 315°
ON for 353°
From
135° to 90°
ON for 315°
From
180° to 45°
ON for 225°
From
170° to 0°
ON for 190°
Fully
Adjustable
181° to 359°
Photocoupler
Light Beam
-BLOCKED-
181° - 360°
Dark
Energized
Theory of Operation
As shown in Figure 1, each output switch is controlled by
two-part interrupter discs which break the beam of light in
a photocoupler. If the DIP switch associated with a
photocoupler is in the “0° to 180°,” or Light Energized mode,
the output will be switched on when the beam is unbroken.
If the DIP switch is in the “181° to 360°,” or Dark Energized
mode, the output will be switched on when the interrupter
breaks the beam.
The gap, or open window in the interrupter is adjusted by
using a wrench to turn the disc halves. Shown below in
Figure 2 is a chart showing a few examples of setting “on”
times, by adjusting the gap and the DIP switch positions.
Disc halves seat tightly to the shaft with O-rings. The discs
are easy to adjust with a wrench, requiring no cumber-
some locking screws or other devices.
Degree Wheel
Pointer
Degree Wheel
Adjustable to
Correspond to
Machine Zero
Photocoupler
0 to 180 Degree Mode
-Light Energized-
DIP Switch
181 to 360 Degree Mode
-Dark Energized-
LED Indicator
Interrupter Disc
Halves
Wrench
for Cam Adjustment
Figure 1
Figure 2
†
SINKING or SOURCING ( as pertaining to Electro Cam Corp. products )
Sinking
means that when the logic is true and the output (or input device) is ON, the output (or input device) is providing a DC
common or ground to the connected device.
Sourcing
means that when the logic is true and the output (or input device) is ON, the output (or input device) is providing a +DC
voltage to the connected device.
This information is important when interfacing an Electro Cam Corp. product with another electronic device. The terms
SINKING /
SOURCING
are not used in the same context by all manufacturers. If you are using an Electro Cam Corp. product input to an Allen-
Bradley 1746-IN16 “sinking” input card* or similar A-B device, you have to supply a +DC voltage to this card, NOT a DC common or
ground. In these cases,
Sinking
is what the card does with the input voltage; sinks it to common or ground.
* Other manufacturers include, but not limited to: Koyo (formerly GE Series 1, Texas Instruments, or Siemens SIMATIC PLS’s) that use descriptions
similar to Allen-Bradley.
(8 paginas)
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