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S106-X Datasheet(PDF) 3 Page - Solid State Optronic |
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S106-X Datasheet(HTML) 3 Page - Solid State Optronic |
3 / 8 page S106-X Zero Cross 400V / 0.8A AC Solid State Relay S106-X Performance & Characteristics Plots, T A = 25°C (unless otherwise specified) ZERO-VOLT SWITCHING This solid state relay has been designed with a driver circuit that controls the operation of two back-to-back silicon controlled rectifiers (SCRs), each responsible for one half of the AC cycle. If an AC signal is examined, the turn on, turn off and zero-volt switching can be seen. Figure 3 shows a typical 60 HZ, 120VAC signal with a corresponding relay input signal: Figure 3 shows the sequence of zero-volt switching operation. At Stage 1, an input signal is applied to the relay. The relay will not turn on until the threshold voltage of 5V is reached. Once this point is reached (Stage 2), SCR #1 (designated as the SCR which controls positive AC voltage) turns on. However, SCR #1 only conducts for an instant, as the cycle quickly crosses zero. At this point (Stage 3), SCR #1 will turn off and SCR #2 (negative AC voltage) turns on. Likewise, at the next zero cross (Stage 4), SCR #2 will turn off and SCR #1 conducts again. Even though the input signal is terminated at Stage 5, the relay will continue to conduct (typical SCR behavior) until Stage 6, when SCR #1 crosses zero and ceases to conduct. Please note that turn on can likewise begin on the negative phase of the AC cycle with a -5V threshold, though only the positive phase is shown here. Figure 3: Zero-Volt Switching Cycle 5V Threshold (Zero Cross Voltage) Input Signal SCR #1 Turns On when 5V threshold is reached SCR #1 Turns Off, SCR #2 Turns On at Zero Volts SCR #2 Turns Off, SCR #1 Turns On at Zero Volts SCR #1 and Relay Turn Off at Zero Volts 5 4 2 6 3 1 Relay Input Signal is Turned On Relay Input Signal is Turned Off Load Signal 0 200 400 600 800 1000 -40 -20 0 20 40 60 80 100 Temperature (ºC) Figure 2: Maximum Load Current vs. Temperature I F =5mA 0 10 20 30 40 50 515 520 525 530 535 540 545 550 Blocking Voltage (V B) Figure 1: Typical Blocking Voltage Distribution (N = 100, Ta = 25ºC) © 2015 Solid State Optronics • San José, CA www.ssousa.com • +1.408.293.4600 Page 3 of 8 S106-X /H/S/TR Rev 2.00 (02/27/2015) 002403 |
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