HIROSE ELECTRIC CO.,LTD.
ETAD-C0320-00
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5
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7
FORM HC0011-9-2
△
４．
Precautions when handling
Electric shock warning
・
This device cannot be used in line with hot-swaps. To ensure operator safety, wear insulating gloves and
turn off the power source
before disconnecting the plug.
When the plug is removed, power flows from the power line to the signal line. When the plug is inserted
and locked, power flows from the signal line to the power line.
（
Sequence order
）
To counteract hot-swaps in the circuit, a circuit that functions as an interlock switch has been
incorporated into the signal line to switch the signal between engaged and locked.
The setup incorporating the interlock switch connection is shown in table 1.
（
The interlock switch is there
only as an emergency countermeasure. Still be sure to turn off the power source when using the service
plug.
）
・
Because electric currents could be present, do not touch the electric line terminals ( A and B in Table 1)
while the power source is turned on.
・
When working near water, make sure that water has not entered the receptacle opening after removing
the plug. If the plug is reattached while there is moisture in the receptacle opening there is a chance of
electric shock, do not reinsert the plug until all moisture has been removed from the receptacle opening.
Table 1: Circuit connection order
Plug removed
Plug inserted
Plug fully locked
Plug unlocked
Plug removed
Diagram
Connec
tions
Power line is
closed. No
current is flowing
because the
signal line is
open.
Signal line is
closed. Current
is flowing
through the
power line
Signal line is
opened. No
current is flowing
Circuit
Diagram
A
－
B
Power source line
C
－
D
Signal line
A
B
C D
P R P R P R P R P R
P:Plug
R:Receptacle
Plug grip shows that
the plug is fully locked
(See next page for
detailed explanation)
Warning
