Available modifications:
FEMTO D4 RS485 230-240V
FEMTO D4 RS485 230-240V 1DI 2DO
FEMTO D4 RS485 230-240V 2AO4-20mA
FEMTO D4 RS485 230-240V 1DI 2DO SELF POWERED
FEMTO D4 E-WI HI 230-240V