H3CA

11

From a solid-state circuit (proximity sensor, photoelectric sensor, or

the like) with rated power supply voltage ranging from 6 to 30 VDC,

input signals can also be applied by other than an open collector type

transistor as shown in the following diagram. The input signal from a

solid-state circuit is applied when output transistor Tr turns ON. In

terms of signal voltage, the signal is input when it goes from a high to

low level. Again, the residual voltage should be 1 V (max.) when the

transistor is ON. As the current output from the timer to Tr is

approximately 0.1 mA, this connection is possible provided the

residual voltage is kept to a maximum of 1 V.

Note: Except for the power supply circuitry, avoid the laying of input

signal wires in parallel or in the same conduit with high-tension

or power lines. It is recommended to use shielded wires or

wiring with independent metal conduits for the shortest

possible distance.

Solid-state circuit (proximity sensor,

photoelectric sensor, etc.)

H3CA-8

(+)

(-)

(+)

(-)

H3CA-8H