The GX3700/GX3700e is provided with the GX3701– Flex I/O Feed Through Expansion Module. The GX3701 provides connection and isolation between the FPGA I/O and the 4 connectors located on the module’s front panel using bus switches. The GX3700 FPGA supports LVTTL, LVDS logic levels and can also be configured for 1.2 / 2.5 / 3.3 V logic level. Each channel can be configured as an input or output or isolated. Via the user FPGA, each I/O can be programmed for a specific logic level and current level. There are no active buffers on this board.