BC7300
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The BC7300 is a versatile bus terminal controller with support for 64 bus terminals and a maximum of 256 digital peripheral signals. Manufactured by Beckhoff as part of the BC Bus Terminals series, it features a D-sub 9-pin RS485 bus interface. It operates with a 24 V DC power supply and has IP20 protection.
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Product Description:
The BC7300 Bus Terminal is made for precise system connections operations. It belongs to the BC Bus Terminals family. Beckhoff designed module provides consistent performance across different industrial automation environments.
The BC7300 bus terminal can operate in very humid environments, but moisture (condensation) must not form on the electronics. It can be set up or adjusted using the KS2000 configuration software or directly via the connected controller. It meets electromagnetic compatibility standards which ensures resistance to electrostatic discharge and electrical bursts. It draws a base input current of 70 mA, plus a portion of the K-Bus current which is the communication and power link between terminals. The module uses a standard 9-pin RS-485 serial connection which is common for industrial communication. It is able to deliver or handle up to 10 amps through its power contacts. The terminal can carry up to 24 volts AC or DC through its power contacts for field device power supply. The module can handle up to 128 analog I/O signals such as voltage or current sensors or actuators.
The BC7300 bus terminal is certified to resist vibrations and shocks during transport or operation. It can draw up to 2.5 times the normal operating current at startup so the power supply must handle short spikes. The module can interface with up to 256 digital I/O points like switches, relays or sensors. It comes with minimal protection from solid objects and none from water. It is designed to mount in any orientation which makes it flexible for space constraints or cabinet layouts. It comes with no internal isolation between power contacts, the supply voltage and fieldbus which is important for wiring and safety considerations.
Frequently Asked Questions about BC7300:
Q: Why does the BC7300 use RS-485 instead of USB or Ethernet for communication?
A: RS-485 supports longer distances and multi-drop communication, which is ideal for industrial environments. It reduces noise interference and allows robust data transmission.
Q: How does the 2.5x power-on surge affect system power planning for BC7300?
A: Since the BC7300 draws up to 2.5 times its operating current during startup, power supplies must be sized accordingly. Undersized supplies may cause boot instability.
Q: What advantages does the BC7300 Bus Terminal offer with 256 digital I/O channels?
A: High digital I/O count allows centralized control of multiple devices through one module. It reduces wiring complexity and streamlines control system design.
Q: How does vibration resistance in BC7300 benefit mobile or high-impact environments?
A: The BC7300’s compliance with IEC 68-2-6 ensures reliable operation in machinery or transport systems. It minimizes downtime due to mechanical shock or vibration.
Q: Why is there no internal isolation between power contact, fieldbus, and supply in BC7300?
A: Lack of isolation reduces size and cost but requires proper external system isolation. BC7300 design assumes centralized control panel safety design.
