Electro Cam EC-3400 Series - Manual (Page 2)

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.