The module LIU (Line Interface Unit) generates different reference clock pulses which are derived from the GPS-locked master oscillator of a preconnected GPS clock. The output signals are available with high accuracy and stability therefore.

The light wave interface card LWL4T converts up to four TTL or RS232 input signals into FO (fiber optical) signals. Each of the signals can be inverted by setting a jumper on the board. The maximum distance between transmitter and receiver comes up to 2000 meters. The board can be equipped with an optional FO receiver.

The expansion board DI32 drives up to 32 outputs into 50 Ohm. The device is provided with a TTL level input.

The expansion board OCTBUF drives up to eight outputs into 50 Ohm. The device is provided with a TTL level input.

Relay-Board RELAQV for additional conventinal relay outputs or Photo-MOS Relay. The REL3_AQV isolates 3 signals via relay. Input pulses are TTL level.