Signal types Coupler Box
In addition to Compact Box modules, the Fieldbus Box series includes other extendable units: the Coupler Box and all the extension modules. The Fieldbus Coupler Box gathers the I/O data from the extension modules over the interference-free IP-Link fibre optic cable. IP-Link is a fibre optic communication link with a transmission rate of 2 Mbits/s which is capable of transmitting 1,000 items of binary I/O data in approx. 1 ms, rapidly and securely. Smaller configurations are correspondingly faster. Because of the high usable data rate, the IP-Link coupling does not reduce the performance of the fieldbus at all.
The extension modules can be spaced up to 15 metres apart, and 120 can be connected to one Coupler Box. The Coupler Box modules are capable of automatically recognising the extension modules connected to them during start-up, and map the I/O data automatically into the fieldbus process image – it is not necessary to configure them. The coupler appears, from the fieldbus point of view, along with all of the networked extension modules, as a single participating bus device with a corresponding number of I/O signals.
The Coupler Box corresponds to the Bus Coupler in the Beckhoff Bus Terminal system. Beckhoff fieldbus devices with protection class IP 20 (Bus Terminals) and IP 67 (Fieldbus Box) can be combined without difficulty – the data is handled in the same way in either case.
Low-priced plug connectors with protection class IP 67 can be used for the rapid and simple preparation of the IP-Link fibre optic cable. The connection does not require special tools and can be performed quickly and simply. The IP-Link cables can also be obtained with prepared plugs if required.
The separate supply of the auxiliary voltage allows output groups to be switched off individually. Differing potentials can also be created within an extension ring without difficulty, since the IP-Link naturally has optimum potential separation.
IP-Link interface on the Coupler Box for the connection of up to 120 extension modules
IP-Link interface on the Extension Box for communication with the fieldbus coupler
|24 V DC||8-channel|
4 input + 4 output
filter 3,0 ms, Imax = 0,5 A