FC7502.1 Beckhoff
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The Beckhoff FC7502.1 is a Lightbus card from the FC Lightbus Cards series with a PCI interface and single slot form factor. It supports data rates of 2, 4, 8, or 16 Mbaud across 2 channels, and uses a SERCOS II fieldbus interface. The card features 4 FSMA bus interfaces and hardware diagnostics with one LED per channel.
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Product Description:
The FC7502.1 is a single-slot interface card from Beckhoff’s FC Lightbus Cards series. It mounts in a standard PC backplane to link a host controller with a SERCOS II fiber-optic network used in distributed motion or I/O systems. By presenting a dedicated fieldbus channel directly on the PCI bus, the card lets an industrial PC exchange deterministic telegrams with servo drives, sensors, and decentralized terminals without adding external gateways. The single-slot format also helps preserve expansion space in control computers that must accommodate several communication or motion modules.
The card exposes independent channels that support aggregate bit rates of 2/4/8/16 Mbaud, and the selectable rate allows the network to be matched to machine size and bus loading while maintaining deterministic timing. Minimum telegram repetition can reach 62.5 µs, so high-speed control loops remain synchronized with peripheral axes during cyclic data exchange. A standard PCI host interface with a 32-bit data path delivers direct memory access through DPRAM and mapped SERCON816 registers, reducing software overhead between the PC and the fieldbus hardware. Beckhoff provides TwinCAT I/O driver support, so configuration and cyclic process data appear as variables inside the automation runtime. This arrangement allows the control application to access bus information quickly during tightly timed motion tasks.
On each channel, telegrams are transmitted over 4 x FSMA (IEC 874-2) connectors driven by 2 x SERCON816 ASICs, providing optical isolation and consistent signal encoding. Up to 254 SERCOS II devices can reside on one fiber ring, and synchronization between the channels is handled through an internal ribbon-cable link. Diagnostic feedback is available through one LED per channel, and the absence of NVRAM means parameter sets are stored in the host PC rather than on the card itself. Typical current drawn from the backplane is only 285 mA, which helps limit thermal load in compact enclosures. Visual status indication and host-based parameter storage support orderly integration with the surrounding PC control platform.
Frequently Asked Questions about FC7502.1:
Q: What type of PC interface is available on the FC7502.1 Lightbus card?
A: The FC7502.1 card supports a PCI interface with 32-bit width, enabling integration into standard PC architectures.
Q: How many channels and devices per channel does the FC7502.1 support?
A: This card provides two independent channels, each supporting up to 254 devices for extensive fieldbus connectivity.
Q: What data rates are supported by the FC7502.1 card?
A: It can communicate at selectable data rates of 2, 4, 8, or 16 Mbaud for flexible networking performance.
Q: How does the FC7502.1 indicate channel hardware diagnostics?
A: Hardware diagnostics include one LED per channel, allowing clear status indication during operation.
Q: What is the typical PCI current consumption for the FC7502.1 Lightbus card?
A: The FC7502.1 requires a typical PCI current of 285 mA for standard operation.
