EK1501 Beckhoff
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The EK1501 EtherCAT Coupler is manufactured by Beckhoff and is part of the EK EtherCAT Couplers series. It supports a maximum coupler distance of 2 kilometers, uses multimode glass fiber for its fiber medium, and features a data rate of 100 MBaud. The unit offers power contacts rated at 24 VDC and 10 A, with an IP20 protection class and 65535 max EtherCAT terminals.
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Product Description:
The EK1501 is a fiber-optic EtherCAT coupler manufactured by Beckhoff for the EK EtherCAT Couplers series. It links an upstream controller to a string of EtherCAT terminals and converts signals from the optical backbone into the E-bus communication required by the connected I/O slices. Within industrial automation cells, the unit can serve as the first node of a remote I/O station. Its optical connection allows process data to travel over long distances without exposure to the electrical interference that can affect copper communication lines.
This coupler exchanges cyclic data at 100 MBaud through two SC duplex optical connections. The physical layer uses multimode glass fiber, allowing standard 62.5/125 µm cables to be routed through control cabinets or along machine gantries. The control electronics receive power from a 24 VDC main rail. Heavy loads connected to downstream terminals receive power through 24 VDC, 10 A power contacts. Internal current consumption is limited to 130 mA plus one-quarter of the combined E-bus current. A local 5 V supply regenerated by the coupler stabilizes the E-bus logic for the attached terminals. All telegrams conform to the EtherCAT Device Protocol to maintain deterministic communication timing. The IP20 housing is intended for installation inside a closed control enclosure that prevents exposure to moisture and conductive debris.
The optical connection can span up to 2 km between couplers, enabling remote I/O panels to be distributed across large machines and production areas. The receiver operates with an input signal as low as -31 dBm. The transmitter produces an optical signal of -20 dBm over 62.5/125 µm fiber, providing sufficient margin for attenuation along the cable route. The address space supports 4.2 GB of addressable I/O data. The coupler also supports 4,096 Hot Connect IDs, allowing predefined terminal groups to be connected or disconnected while the EtherCAT network remains active. A network can accommodate as many as 65,535 EtherCAT terminals, providing extensive capacity for modular I/O arrangements. These addressing features allow sensors, actuators, and other field devices to exchange process data through the same optical EtherCAT segment.
