Omron H3CR-A Manual page 294

H3BA
!
Caution
Inputs to H3BA, H3BA-FA and H3BH-8R
A transformer is not used in the power supplies for the H3B Se-
ries. You can therefore receive an electrical shock by touching
the input terminals when the power supply voltage is being ap-
plied. Take adequate precautions to protect against electrical
shock.
To the input signal terminals of the Timer, an appropriate input is
applied when one of the input terminals No. 5, 6, 7 (D
and the common terminal for the input signals (No. 2 for H3BA,
No. A2 for H3BA-FA) are short-circuited. Do not attempt to con-
nect any input terminal to any terminals other than the common
terminal or to apply voltage across other than the specified input
and common terminals. Otherwise, the internal circuit of the Tim-
er may be damaged.
(See
note 2)
Note: 1. Power supply terminal No.2 (A2) is a common termi-
nal for the input signals (G, S, R) to the Timer. Never
use terminal No.10 (A1) as the common terminal for
this purpose, or the internal circuit of the Timer may
be damaged.
2. Do not connect a relay or any other load between
these two points, or the internal circuit of the Timer
may be damaged due to the high-tension voltage ap-
plied to the input terminals.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
Cat. No. L31-E1-7
294
Power Supply Connection
If the Timer is connected to an AC power supply, its two-pole ter-
minals can be connected to the power supply in either direction,
regardless of the polarity. But if it is connected to a DC power
supply, be sure to connect the Timer's power terminals to the
correct polarities.
Use sine wave for the waveform of an AC power supply. Use a
DC power supply having a ripple factor of 20% or less and sup-
, C , B )
1 1 1
plying a mean voltage that is within the rated operating voltage
range of the Timer.
Make sure that the supply voltage is applied to the Timer all at
once, using contacts such as of a switch or relay. If the supply
voltage is applied gradually, the Timer may not be able to per-
form power reset or its set time may be up when it should not.
Power Source Connection
Because the AC-operated version is a capacitive load, the solid-
(See note 1)
state relay to be used must be rated at a dielectric strength two
times that of the Timer to switch the power source of the Timer.
H3BA