The LPXT-MOD-CHASSIS is a 1RU 19" rack mount chassis designed to hold up to 16 LPXT protection modules which when installed into the chassis leaves all input/output connections facing front. The LPXT Series Protection Modules employ a hybrid protection solution comprised of high-energy gas discharge tube technology and low-capacitance transient blocking technology. You can mix & match the different modules to meet your unique configuration requirements. Note: The dedicated dual ground studs on the rear of the unit must be connected to the nearest master ground bar for proper operation.