31109 – Bus interface connector for PROFIBUS and CAN Bus Couplers simplifies bus wiring considerably. There are separate terminals for incoming and outgoing leads. A large area of the screen is connected via the cable grip. The integrated termination resistor can be switched externally. When it is switched on, it makes a break in the outgoing bus lead – this allows rapid fault location and guarantees that no more than two resistors are active in the network.