This Bus module allows an additional 8 inputs to ECi or ESX control panels. All zone inputs are fully programmable including EOL configuration, per zone. There are indicator LEDs to show the status of each of the 8 inputs. There is also a dedicated cabinet tamper input. This unit also supports the plug on EC-PSU2 plug on power supply module which can supply 1A and has dynamic battery testing & AC fail functionality. Please note that the power supply module requires 16VAC.