The long cable runs of RS-485 networks in factory halls are subject to noise pick-up from radiating noise sources such as machines and generators, and from conducted noise in the form of overvoltage transients. One specific category of these transients includes electric fast transients (EFT) that originate in the electrical installation due to the switching of inductive loads and the contact bounce of large relays. These transients can corrupt the transmitted data and even damage the bus transceivers through a condition known as latch-up. Latch-up is a situation where the transient-induced noise does not cause the actual damage, but creates a parasitic current path between the power supply rails (V_CC and ground) instead. This disrupts proper transceiver operation and can lead to the destruction of the device due to overcurrent. Although most transceiver designs are able to survive such overcurrent events, an on/off power cycle is required to bring the device out of latch-up. In any case, latch-up causes costly network downtime.