WIKA CS4L - Manual (Page 15)

Operating Instructions Temperature Indicating Controller CS4H / CS4L
V1.1 • 05/2006 - 15 -
[Heater burnout alarm output]
(1) This alarm is not available for detecting
heater current under phase control.
(2) Use current transformer (CT) provided,
and pass one lead wire of heater
circuit into the hole of the CT.
(3) When wiring, keep CT wire away from
any AC sources and load wires to avoid
the external interference.
(Fig. 4.2-1)
[CS4H-R/M]
(Fig. 4.2-2)
• 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.
• AC or DC is available to supply voltage 24 V. Do not confuse the polarity when it is DC.
3-phase
Electro-
magnetic
switch
Heater
Electric furnace
Alarm unit
Thermocouple
CT input terminal
Power source
CT
Heater
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