Profile: Fiobus Ltd specializes in the design and manufacture of GPIB interface products. The SCI 40-20 digital interface is a compact multifunction I/O unit. It is used in interfacing BCD inputs or outputs, driving LED's, relays & solenoids, generating TTL pulses and control of custom scanners. The RDO32 is a relay driver module capable of driving up to 32 outputs directly. Lines not required for driving relays, lamps and solenoids may be used to transmit general purpose I/O data signals at TTL levels in a similar manner to the SCO64.