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SDC36 Datasheet(PDF) 4 Page - Semtech Corporation |
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SDC36 Datasheet(HTML) 4 Page - Semtech Corporation |
4 / 6 page 4 ã 2000 Semtech Corp. www.semtech.com PROTECTION PRODUCTS SDC36 Device Connection for Protection of Two, Three, and Four Wire Proximity Switches Digital sensors help to bridge the gap between the physical world and the digital world in applications such as computer controlled factory automation. In such environments, transient voltages can easily disrupt or damage sensitive sensor inputs. The SDC36 provides transient voltage protection for the digital sensors to ensure their operation is not disrupted by the physical world. The SDC36 is designed to meet the high surge capabil- ity and low clamping voltage needed to protect the ASIC and control logic used in proximity switches. The SDC36 provides protection for the power and I/O lines. Typical configurations for the protection of two, three, and four wire switches are as follows: 1. Two-Wire Switch: Connect pin 1 to the I/O line and pin 2 to the DC supply (since the device is symmetrical, these connections can be reversed). Pin 3 is not connected. 2. Three-Wire Switch: Either pin 1 or pin 2 is con- nected to the I/O line with the other connected to ground. Pin 3 must be connected to the DC supply. 3. Four-Wire Switch: Two device are required to protect four wire switches. Pin 3 of each device is connected to the DC supply line. Pins 1 & 2 are connected to the I/O lines & ground as shown. 2-Wire DC Proximity Switch Application 3-Wire DC Proximity Switch Application 4-Wire DC Proximity Switch Application Applications Information |
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