First you need the 'double decker' 100mm x 266mm module... MultiLogo V431 Modular HD/SD logo keyer with three layers of keying and 4 GB video store. Includes four HD/SD inputs providing external live sources Next choose your frame size and power supplies - from 4U to desk top box... Indigo 4 CoolFlow 4U frame with power supply redundancy and passive front panel for up to 24 Crystal Vision modules Indigo 4SE CoolFlow 4U frame with power supply redundancy and passive front panel fitted with Statesman CPU for up to 24 Crystal Vision modules. Allows Ethernet connection to a PC running Statesman Indigo 2 CoolFlow 2U frame with power supply redundancy and passive front panel for up to 12 Crystal Vision modules Indigo 2AE 2U frame with power supply redundancy and active front panel for up to 12 Crystal Vision modules. Allows Ethernet connection to a PC running Statesman Indigo 2SE CoolFlow 2U frame with power supply redundancy and passive front panel fitted with Statesman CPU for up to 12 Crystal Vision modules. Allows Ethernet connection to a PC running Statesman Indigo 1 1U frame with passive front panel for up to six Crystal Vision modules Indigo 1AE 1U frame with active front panel for up to six Crystal Vision modules. Allows Ethernet connection to a PC running Statesman Indigo 1SE 1U frame with passive front panel fitted with Statesman CPU for up to six Crystal Vision modules. Allows Ethernet connection to a PC running Statesman Indigo 1-DP 1U frame with power supply redundancy and passive front panel for up to six Crystal Vision modules. Includes two fixed PS-80i power supplies Indigo 1AE-DP 1U frame with power supply redundancy and active front panel for up to six Crystal Vision modules. Includes two fixed PS-80i power supplies. Allows Ethernet connection to a PC running Statesman Indigo 1SE-DP 1U frame with power supply redundancy and passive front panel fitted with Statesman CPU for up to six Crystal Vision modules. Includes two fixed PS-80i power supplies. Allows Ethernet connection to a PC running Statesman Indigo DT Desk top box with passive front panel for up to two Crystal Vision modules. Includes fixed power supply Indigo DTAE Desk top box with active front panel for up to two Crystal Vision modules. Includes fixed power supply. Allows Ethernet connection to a PC running Statesman Indigo DTSE Desk top box with passive front panel fitted with Statesman CPU for up to two Crystal Vision modules. Includes fixed power supply. Allows Ethernet connection to a PC running Statesman PSU-160i 160 Watts power supply for 1U, 2U and 4U frames. 1U frames require one PSU-160i (no redundancy). 2U frames require either one PSU-160i (no redundancy) or two PSU-160i if power supply redundancy is required. 4U frames require minimum of two PSU-160i (with compulsory redundancy) or four PSU-160i if the power consumption in the frame exceeds 150W You need a rear module to access your inputs and outputs... RM52 + RM34 Two single slot frame rear modules used together. Allows 12 MultiLogo V431 in 4U, six in 2U, three in 1U and one in desk top box. Provides relay bypass protection of the input. Gives access to four HD or SD inputs, a Black and Burst or tri-level syncs analogue reference, one HD or SD main output and one HD or SD preview output Finally - control. Use board edge switches, the active front panel if you've selected one of the 'AE' frames, or alternatively order one of the items below... REMIND 19" remote control panel REMIND-E 19" Ethernet remote control panel (control an unlimited number of Crystal Vision frames over an Ethernet network) Statesman PC Control System SNMP SNMP monitoring and control available as a frame option Please note that MultiLogo V431 can be controlled from automation systems and video mixers, thanks to its industry standard software protocols