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Transistor (including thyristor) output is an active switch. It is required that the load must be matched or adapted to the corresponding power supply. For inductive loads, sometimes it is necessary to consider a diode. If you use pulse output, it is better to choose a PLC with a transistor output. The relay should sometimes be unstable.
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Digital Outputs in PLC. Here, we will consider the various types of digital outputs in the PLC. Before going into the types, let us consider how an output functions in a PLC. A digital output is nothing but a switch that a PLC operates to turn on or off the output device. It is controlled by the logic written inside the PLC. Types of Contacts
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The Siemens 6ES7322-1BP50-0AA0 is a 64 output Transistor Output Module. As with all transistor output modules, it can control DC loads only. Let's look at how one of the outputs operates. When the PLC signal is applied, the BJT will turn on and provide a current path for the load.
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In summary, a transistor is fast, switches a small current, has a long lifetime and works with dc only. Whereas a relay is slow, can switch a large current, has a shorter lifetime and works with ac or dc. Select the appropriate one based upon your actual application needs. Learn quickly with our PLC Training DVD Series: on sale $599.00 $379.
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4420751 [AL2-4EYT from Mitsubishi Corporation] from RS Components, Ltd. These modules give additional I/O flexibility to Alpha 2 users. They fit alongside the Alpha 2 (see stock no 442-0789). Depth 53 mm, Height 90 mm, Width 24.5 mm. Manufacturer Series = Alpha 2. Output Type = Digital, Transistor. Number of Outputs = 4.
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One key aspect of PLC functionality lies in its output types, which determine how the controller interfaces with external devices. This article will explore the three primary PLC output types: Relay Output, Transistor Output, and Silicon Controlled Rectifier (SCR) Output. The relay output type involves the CPU driving relay coils, causing the.
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A transistor output can switch max. 0.3A, a relais output can switch up to 10A. That's the biggest difference. So you can say you use transistor output for small loads 24V (or 12) and you use relais outputs for heavy loads or loads wich must be swiched potential free. you can have a look at the logo Manual. For more technical details.
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FA-COM PLC: Digital I/O Module. Series: MELSEC IQ-F SERIES: Type: TRANSISTOR OUTPUT (SINK) Occupied I/O Points on PLC: 16: Integrated Digital Outputs: 16: Output Type: TRANSISTOR: Output Logic: SINK: Product Dimensions & Weight. Width (mm) 40: Height (mm) 90: Depth (mm) 83: Weight (kg) 0,195:
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The actual switching in many output modules is performed by Bipolar Junction Transistors (BJTs): - In a Sinking module, the transistor is an NPN. - In a Sourcing module, the transistor is a PNP. The current flows into a sinking module and out of a sourcing module. If a PLC output module is listed as an NPN type, you can be sure that it is a.
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PLC Output Cards. These cards typically have 8 to 16 outputs of the same type and can be purchased with different current ratings. A common choice when purchasing output cards is relays, transistors or triacs. Relays are the most flexible output devices. They are capable of switching both AC and DC outputs.
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There are several types of solid state outputs available with PLC's. Three popular types are transistor, triac and TTL. All three of these output units will generally have a common terminal although triac output units are available in an isolated configuration.
P L C
1 Answer. Sorted by: 4. COM is the common connection for relay or transistor outputs; essentially when the output is activated, the PLC will energize the relay or transistor, effectively connecting the NO (normally open) pin to the COM (common) pin. Some PLCs have form-C contacts, which would have NO, COM and NC (normally closed) contacts.
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Two of the most important fundamentals to understand when it comes to sensors is sinking and sourcing circuits. To properly wire your control device, you need to first know whether the sensor you are using is switching the positive or negative connection. For AC (alternating current) sensors, this is not an issue since AC power alternates it.
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I was connecting some external relay module boards to the output terminals of a PLC system. This output module was a DC 24 volt output, and the relay boards had rated a coil voltage of 24 volts as wellโnot an unusual scenario. Figure 1. PLC I/O modules are flexible but can have many hidden surprises when connected to various load devices.