User Manual – Rev AY AMETEK Programmable PowerMX Series 673.7.8 ES Option - Emergency Switch Interconnect for –MB systems – BNCAn optional BNC connector is located on the rear panel for connecting multiple chassis, eachhaving a controller and an emergency shut off switch (-ES option). This connection is required tocreate an OR-ed operation of more than one –ES switch.This connector is only present on MX-MB systems with the –ES option. If present, a suitableBNC cable should be used to connect the emergency shut off signal between chassis. Thisconnector is labeled as follows:"Caution: BNC cable must be connected for system Emergency Shut-Down"See figure below for an illustration of a MX90-MB-ES interconnect.Figure 3-17: Emergency Switch (ES Option) shut off inter connect on -MB systems.