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DC Load DC Control Solid State Relay - del30007This is a DC Input DC Output SSR Solid State Relay. It was made for Printing or Photo Processing Equipment. It has an optical isolation and can be used for inductive loads.The R1 Limits current and Z1 and D1 protects. The 2N3904 limits current in the Opto-Led. When the LED in CNY17-3 turns on, the Light passes thru a electrically insulating area and falls on the photo-transistor in the opto-coupler. This transistor conducts biasing Q2 PNP power transistor. Then Q2 drives Q3 to saturation, turning it on. Q3 is a High-Voltage and High-Power rugged device. This can derive a solenoid, DC motor or Lamp. D2 is a freewheeling diode, inductive kickbacks are shorted by this. use a fast rec. Diode for better performance. Control Signal is - DC, 3-30V and Output Rating is - DC, 25V, 5A.  |
| PNG-Schematic, PDF-Circuit, PCB - DT L1 L2 SS SM |
| DC Load DC Control Solid State Relay - del30007 |
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Q3 BU508A pdf is a High voltage fast-switching NPN power transistor. Q2 2N6107 is a Power 7A 70V Discrete PNP. 2N3904 is a NPN General Purpose Amplifier.  This was the facia-sticker made out of polycarbonate material. It was then reverse printed using screen printing. This facia was done by a mechanical draughtsman. He worked with an offset printing person to get fonts. The rest was hand-drawn. I gave the basic inputs and some color choices.  |