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24 V DC
SSR
CT
Alarm unit
Thermocouple
Heater
Ground
Single-phase
3-phase
100 to 240 V AC
Ground
*
Alarm unit
Power
supply
Electric furnace
Thermocouple
Electro-
magnetic
switch
Heater
4.3 Wiring Example
ACD-13A-R/M
*
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.
ACD-13A-S/M 1, W
• Number of Shinko SSR units when connected in parallel:
SA-400 series: 5 units, SA-500 series: 2 units
• For a 24 V AC/DC of power source, do not confuse polarity when using a direct current (DC).
(Fig. 4.3-1)
(Fig. 4.3-2)