Panasonic KT9 Instruction Manual page 14

[Heater burnout alarm output]
(1) This alarm is not available for detecting
heater current under phase control.
(2) This alarm is not available for detecting
3-phase heater current.
(3) Use the current transformer (CT) provided,
and pass one lead wire of the heater
circuit into the hole of the CT.
(4) When wiring, keep CT wire away from
any AC source and load wire to avoid
external interference.
(5) Solder the CT and wires connected to the
CT input terminals. (There is no polarity.)
[AKT9111100]
Electro-
magnetic
switch
Electric furnace
*
To prevent the unit from harmful effects of unexpected high level noise, it is
recommended that a surge absorber be installed between the electromagnetic
switch coils.
• For a 24V AC/DC power source, do not confuse polarity when using direct current (DC).
3-phase
100 to 240V AC
or 24V AC/DC
Heater Thermocouple
(Fig. 4.2-2)
Solder the CT and wires connected
to the CT input terminals.
(There is no polarity.)
Power supply
for Alarm unit
Alarm unit
14
15
16
Power source
CT
(Fig. 4.2-1)
Heater
CT input terminals