User's Manual

UL-801 Installation Manual
Page 7
23-20-06 15 December 2011
F. UASC FMS Interface
The UniLink provides concurrent user interface access for up to three UASC Flight
Management Systems. The ARINC 429 interface uses the ARINC 739 protocol for display
control and ARINC 619 bit oriented file transfer protocol for file exchange between the
devices. Each UASC FMS provides a high-speed ARINC 429 channel as inputs to UniLink.
The specific channel will be specified by the configuration module, based on aircraft wiring.
Any of the general purpose ARINC 429 output buses can be configured as output bus to the
FMS. However, ARINC TX port #1 is hard set to low speed and is required by the number 1
FMS. UniLink provides an RS-422 proprietary graphics display bus interface between the
unit and each UASC CDU for low resolution graphics.