H3CR-A
H3CR-A
35
When connecting a relay or a transistor as an external signal input
device, pay attention to the following points to prevent short-circuit-
ing due to a sneak current to the transformerless power supply.
If a relay or transistor is connected to two or more Timers, the input
terminals ofthoseTimersmustbewiredproperlysothattheywillnot
be different in phase or the terminals will be short-circuited to one
another (refer to the figures below).
Incorrect
Contact or transistor for
external input signal
H3CR series timer
Input
terminal
Input
terminal
Power supply
Power supply
Correct
Short-circuit
current
Input
terminal
Input
terminal
TheH3CRtransistoroutputis insulatedfrom the internal circuitry by
a photocoupler, so either NPN or PNP output is possible.
Environment
WhenusingtheTimerinanarea withexcess electronic noise,sepa-
rate the Timer, wiring, and the equipment which generates the input
signals as far as possible from the noise sources. It is also recom-
mended to shield the input signal wiring to prevent electronic inter-
ference.
Organic solvents (such as paint thinner), as well as very acidic or
basic solutions can damage the outer casing of the Timer.
Others
If the Timer is mounted on a control board, dismount the timer from
the control board orshort-circuit the circuitry of the power board be-
fore carrying out a voltage withstand test between the electric cir-
cuitry and non current-carrying metal part of the Timer, in order to
prevent the internal circuitry of the Timer from damage.
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. L84-E1-1C
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