(2) Wiring
Turn off the power supply and buffer relay power supply before wiring to prevent electric shock.
Connect leads to the load via a buffer relay.
Use leads with crimp terminal lugs (with insulating sleeves).
If a voltage of 30 Vac/60 Vdc or more is applied to the output terminals, connect the
signal lead by a cable terminated by a round crimp terminal lug (with insulating sleeve).
Also, use double insulation (2300 Vac withstand voltage or more) for signal leads to
which a voltage of 30 Vac/60 Vdc or more is applied, and basic insulation (1390 Vac
withstand voltage or more) for other signal leads. After wiring, be sure to attach the
terminal cover to prevent electric shock.
Example of mechanical relay Form A contact output Example of mechanical relay Form C contact output
Power
Load
b
a
Buffer relay
ARF200
N.O
COM
N.
Power
Load
b
a
Buffer relay
ARF200
N O
COM
C
*
:
Contact point protective surge absorber
Handling Precautions
・
The alarm output device can be damaged by a spark from the buffer relay or breakdown of the surge
absorbing element. Be sure to take appropriate safety measures as necessary.
Connect a load that is within the specified
contact capacity of the alarm output terminals.
Since the power for the buffer relay is applied
to the alarm output terminals, touching these
terminals will result in an electric shock. Be
sure to attach the terminal cover after wiring.
Warning
(placement on the “a” side is recommended)
* The operation of N.C. terminals is opposite to that of
. terminals. They open when an alarm occurs.
:
Contact point protective surge absorber
(placement on the “a” side is recommended)
N.O
13