Datasheet

H3CR-A
24
Relationship between Input and Power
Supply Circuits (H3CR-A@/-A@S)
An appropriate input is applied to the input signal terminals of the
H3CR-A@/-A@S when one of the input terminals is short-circuited
with the common terminal (terminal 2) for the input signals. Never
use terminal 10 as the common terminal for this purpose, otherwise
the internal circuit of the Timer will be damaged.
*1 Power terminal 2 is a common terminal that is also used for the
input signal. Do not use terminal 10 as a common terminal as
this will damage the internal circuitry.
*2 If a relay or other load is connected here, high voltage will be
applied to the input terminal and damage the internal circuitry.
• The transistor output of the H3CR-A@S is isolated from the internal
circuitry by a photocoupler, and can therefore be used either as an
NPN output type or a PNP (equivalent) output type.
Relationship between Input and Power
Supply Circuits (H3CR-AP)
Since the input circuit and the power supply circuit are configured
independently, the input circuit can be turned ON or OFF irrespective
of the ON/OFF state of the power supply.
It must be noted that a voltage equivalent to the power supply voltage
is applied to the input circuit.
If a relay or transistor is connected to two or more Timers, the input
terminals of those Timers must be wired properly so that they will not
be different in phase or the terminals will be short-circuited to one
another (refer to the figures below).
When using the timer in an environment where considerable noise
occurs, keep the input signal source device, timer unit, and wiring as
far away as possible from the source of the noise. It is also
recommended that shielded wire be used for the input signal wiring
as a countermeasure for noise.
Common to All H3CR-A Models
With the H3CR-AP, input wires must be as short as possible. If the
floating capacity of wires exceeds 1,200 pF (approx. 10 m for cables
with 120 pF/m), the operation will be affected. Pay particular
attention when using shielded cables.
The H3CR-A@S transistor output is isolated from the internal
circuitry by a photocoupler. Therefore, either NPN or PNP output is
possible.
5, 6, 7
G, S, R
10
2
Input terminal
Correct
AC or DC
power supply
H3CR-A/-AS
10
2
5, 6, 7
G, S, R
H3CR-A/-AS
Input terminal
Incorrect
AC or DC
power supply
*1
10
2
5, 6, 7
G, S, R
Ry
Input terminal
AC or DC
power supply
Input
contact
H3CR-A/-AS
*2
Input circuit
H3CR-AP
AC/DC
power
supply
Power supply
circuit
10
6
7
2
10
6
7
2
Incorrect
H3CR-AP
Power supply
H3CR-AP
Short-circuit current
Contact or transistor for
external input signal
10
6
7
2
10
6
7
2
Correct
Power supply
H3CR-AP
H3CR-AP
Short-circuit current
Contact or transistor for
external input signal
In the interest of product improvement, specifications are subject to change without notice.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.