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24 Vac Power& Wiring
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It is not necessary to ground any leg of the transformer to earth with the controller card.
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The controller uses internally a half wave rectifier bridge. On 0 to 10 Vdc control signal, the reference of the control
signal is the Common of the power supply of the SCR controller card.
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Use a Class 1 (properly fused) or Class 2, CSA or UL recognized transformer.
High voltage Wiring
General cautions:
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High voltages are present on the terminals of these devices. Please read all the instruction in this manual carefully.
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The 45 & 75 Amps models need to be wired with the supplied high voltage lugs. Detach the lug from the SSR
first, connect the wires, and then screw the lug to the power module. Refer to Illustration 1 on page 3.
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Have the wiring done by a qualified and skilled professional.
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High voltage and amperage can be fatal.
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All wiring must conform to national electrical code regulations.
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The instrument must be wired before applying power.
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Protect circuits with semi-conductor fuses.
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For in panel installation, derating amperage curves are available from the factory.
Specifications
Operating Conditions:
Thermostatic protection:
Power supply: 24 Vac -15%, +10% 50/60 Hz; 2 VA
0°C to 80°C (32°F to 176°F) / 0 % to 95 % R.H. non-condensing
Self-resetting. Auto shut off when SCR ambient temp. is above 82°C (180°F)
Use a Class 1 (properly fused) or Class 2, CSA or UL recognized transformer.
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