Beckhoff PLC Module I/O Series KL9050 Digital Input Bus Terminals

The KL9050 coupler terminal replaces the Bus Coupler on a Bus Terminal block. The KL9050 is the counterpart to the KL9020. The S(F)TP cable (shielded twisted pair) is plugged into the upper socket, providing the logical connection to the Bus Coupler. The extension is fully transparent for the Bus Coupler. All Bus Terminal system functions remain unchanged. The second RJ45 socket allows the system to be extended further. A new KL9050 can be connected to the first coupler terminal. The whole system can thereby be extended by 31 stations. The supply voltage for the field level and the internal electronics can be input separately. Both levels are thereby electrically isolated from one another. In the KL9050 a 400 mA K-bus power supply unit supplies the added Bus Terminals. The internal electronics and the field level can be supplied together from a single voltage source. Three diagnostic LEDs give information about the supply voltage for each Bus Terminal block, internal and field level. The KL9050 can be used as the last coupler terminal in the system or as a bridge between two Bus Terminal blocks. You can switch between these two functions with a selector switch. The switch must be correctly positioned for the system to operate.

System expansion

Based on a bus terminal block consisting of a Bus Coupler and a maximum of 64 Bus Terminals, using the K-bus Extension Terminals KL9020 and KL9050 your system can be expanded by up to 31 terminal blocks. The expansion terminal blocks can be equipped with a maximum of 64 Bus Terminals each. The maximum permissible configuration consists of 255 Bus Terminals and 1020 I/Os. The K-bus Extension Terminals KL9020 and KL9050 enable a distance of 5 m max. between two terminal blocks and therefore an overall system length of 155 m.

The K-bus Extension Terminals KL9020 and KL9050 integrate seamlessly into the Beckhoff Bus Terminal system in terms of their appearance and functionality. The transparent terminal lugs used for labelling indicate their function as system terminals