Omron CJ-Series Operation Manual page 53

Wiring Examples
Example Programming
Output Wiring Precautions
Output Short Protection
TTL Connections
Inrush Current
Considerations
34
gram incorporating a timer delaying inputs from the sensor for a set time
after the sensor's power supply is turned ON until the sensor's operation
has stabilized.
The sensor's power supply status is read with CIO 000000. The timer pro-
vides a delay until the sensor's operation has stabilized (100 ms for an
OMRON Proximity Sensor.)
Once TIM 0000 goes ON, output CIO 000100 will be turned ON when a sen-
sor input is received in input bit CIO 000001.
000000
TIM
0000
#0001
TIM0000 000001
000100
The output or internal circuitry might be damaged when the load connected to
an output is short-circuited, so we recommend installing a protective fuse in
each output circuit. Use a fuse with a capacity about two times greater than
the rated output capacity.
A TTL device cannot be connected directly because of the transistor's resid-
ual voltage. In this case, connect to a TTL Unit after receiving signals with a
CMOS IC. Also, a pull-up resistor must be used with the transistor output.
When switching a load with a high inrush current, such as an incandescent
light bulb, there is a risk of damaging the output transistor. Suppress the
inrush current using one of the methods shown below.
Method 1
OUT
CJ1M CPU Unit's
built-in I/O
COM
This method draws a dark current that is approximatel
one-third of the rated value of the light bulb.
Method 2
OUT
CJ1M CPU Unit's
built-in I/O
COM
This method uses a limiting resistor.
L
+
R
R
L
+
Section 3-3