RS485 Controller Cable
RS485 Control Cable Description RS485 Control Cable Parameter RS485 Control Cable Introduction RS485 is a serial communication standard commonly used for industrial control and automation applications. RS485 control cables are used to connect devices in an RS485 network. Some key points about…
Product Introduction
RS485 Control Cable Description
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· PVC insulated |
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· Different Fuction cable as Requirement |
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· Suitable for Industrial use |
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· UL listed for safety; IEC standard; TUV |
RS485 Control Cable Parameter
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Rated Voltage: |
7V-14V |
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Rated Current: |
20mA-40mA |
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Connector: |
PVC insulated |
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Power Supply: |
Electric |
RS485 Control Cable Introduction
RS485 is a serial communication standard commonly used for industrial control and automation applications. RS485 control cables are used to connect devices in an RS485 network. Some key points about RS485 control cables:
• RS485 uses differential signaling over two wires – a Data+ wire and a Data- wire. This provides noise immunity and the ability to run long cable lengths.
• RS485 cables typically have at least two twisted pair wires for Data+ and Data- , and sometimes an optional ground wire. The twisting helps reduce electromagnetic interference (EMI).
• RS485 uses a multi-drop bus topology, meaning multiple devices can be connected to the same cable. Each device has a unique address.
• RS485 can run at data rates from 1200 bps up to 10 Mbps or higher, depending on cable length and device capabilities.
• RS485 allows cable lengths of up to 1200 meters (4000 feet) at lower data rates, making it suitable for industrial and building automation applications.
• RS485 uses relatively low voltage levels of ±7V for ‘1’ and ‘0’ signal states. This keeps power consumption low.
• Typical current draw in an RS485 network is in the milliamp range (20-40 mA maximum). This allows many devices to share the same cable.
• RS485 cables are designed to withstand the environmental conditions found in industrial settings, with shielded, ruggedized cables available.
So in summary, RS485 control cables enable robust, differential serial communication between multiple devices over long distances at low data rates. This makes RS485 suitable for industrial control and automation applications where noise immunity, cable length and multi-drop topology are important requirements.
Frequently Asked Questions
RS485 Control Cable
What is the maximum cable length for RS485?
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The maximum cable length for RS485 depends on the data rate and cable quality. In general, RS485 can run up to 1200 meters (4000 feet) at lower data rates (below 100 kbps). At higher data rates, the maximum cable length is shorter.
What is the maximum data rate for RS485?
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The maximum data rate for RS485 depends on the cable length. In general, RS485 can run at data rates from 1200 bps up to 10 Mbps or higher. But at higher data rates, the maximum cable length is shorter.
What voltage does RS485 use?
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RS485 uses differential voltage levels of ±7V for ‘1’ and ‘0’ signal states. The typical operating voltage range is -7V to +12V.
What current does RS485 use?
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The maximum differential current for RS485 is typically specified as around 40 mA. But for typical applications, the actual current draw will be much lower, in the range of 20-30 mA.
How many devices can be connected to an RS485 bus?
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Theoretically, RS485 can support up to 32 devices on a single bus. However, in practice the maximum number of devices depends on factors like data rate, cable length, and device capabilities. Fewer than 32 devices is more common.
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