KLxxxx | Bus Terminals www.beckhoff.com/BusTerminal The Bus Terminals have a galvanic isolation between the field level and the communication level (K-bus). A terminal is equipped with 1…n input or output channels. The channels within a terminal are usually not electrically isolated from each other. Beckhoff Bus Terminals feature function-dependant coloured labels: for example yellow for digital inputs, red for digital outputs, green for analog inputs and blue for analog outputs. The LED frames for HD Bus Terminals are colourcoded accordingly. Bus Terminal 406 The power contacts on the left hand side (if available) supply the terminals with field voltage. Depending on the terminals 24 V DC, 230 V AC or other voltages are transferred. The supply power required is listed in the technical data. The maximum load of the power contacts is 10 A. Different field level connection techniques can be used for Bus Terminals: – standard terminal point: with ferrule 0.14…1.5 mm²; stranded wire/solid wire 0.08…2.5 mm², spring-loaded technique – HD Bus Terminal: with ferrule 0.14…0.75 mm²; stranded wire 0.25…1.5 mm², solid wire 0.08…1.5 mm²; spring-loaded technique for direct plug-in – ribbon: especially used in Asia for digital input/output channels – plug-in wiring level: KS terminals +60 °C -25 °C Extended operating/ storage temperature Extended mechanical load Some 2-channel Bus Terminals have a PE power contact, which can be used for PE distribution by connecting it together with similar terminals. The EMC spring contact on the underside of the terminal only serves to remove interference and may not be used as a protective earth . Technical data see page 378 We reserve the right to make technical changes.
2-channel terminals The 2-channel terminals provide additional power (+24 V DC), ground (0 V DC) and in many cases also PE for each channel. Connection is carried out with 3- or 4-wire connection. 4-channel terminals Along with four channels the 4-channel terminals have another four connection points available. These can provide 24 V DC or ground. Connection is carried out with 2-wire connection. 8-channel terminals The 8-channel terminals have one channel per connection point due to a high packing density. The power contact of the terminal will be used as the common reference potential. Connection is carried out with 1-wire connection. 16-channel terminals The HD (High Density) housing allows 16 channels to be accommodated on a unit that is only 12 mm wide. The power contact of the terminal will be used as the common reference potential. Connection is carried out with 1-wire connection. The Bus Terminals offer the possibility to directly connect many different signals. No signal converter or additional evaluation device is needed. The direct connection reduces the costs and simplifies the control technology. Each Bus Terminal separates the internal electronics from the connection level and thus simplifies the creation of voltage groups with different voltages. In addition, interfering voltages on the signal connector lose their adverse effects. The KL1xxx, KL2xxx Bus Terminal product family is designed for the processing of digital or binary signals. There are “High” and “Low” states. In the positive switching logic the High state corresponds to the level of the supply voltage, the Low state corresponds to ground level. For negative switching logic it is the other way around. The Bus Terminal product family supports both types of logic for various supply voltages. 1-, 2-, 3- and 4-wire connections allow the use of Bus Terminals in almost all applications without further wiring work. The KL3xxx and KL4xxx Bus Terminal product family processes analog signals. The most commonly used are 0 to 10 V, ±10 V, 0 to 20 mA and 4 to 20 mA. Also many other industry-standard voltage and current signals are supported and pre-processed. In the KL5xxx and KL6xxx Bus Terminal product families other complex signals, such as position values and digital interfaces, are supported. Some Bus Terminals act as fieldbus masters for subordinate bus systems. The Bus Terminal station thus becomes a universal gateway between different systems. The KL9xxx system terminals round off the application of Bus Terminals with power feed and power supply units. Bus Terminal 407 Technical data KLxxxx | KSxxxx Electrical isolation 500 V (K-bus/field potential); if not indicated otherwise Operating/storage temperature 0…+55 °C/-25…+85 °C (extended temperature range: -25…+60 °C/-40…+85 °C) Relative humidity 95 %, no condensation Vibration resistance conforms to EN 60068-2-6: 1 g (extended range: 5 g) Shock resistance conforms to EN 60068-2-27: 15 g, 11 ms (extended range: 25 g, 6 ms); 1000 shocks per direction, 3 axes EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4 Protect. class/installation pos. IP 20/variable (see documentation) Pluggable wiring for all KSxxxx Bus Terminals We reserve the right to make technical changes.