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Introduction
The UP-820F/UP-820N inter-register communication (IRC) system consists of one master machine and up
to 31 satellite machines which are all interconnected by the local area network (LAN) to provide data
transmission among them. This system allows the manager to exercise centralized control over the satellites
through the master.
• One of the satellites may be used as a back-up master.
The additional RAM board, UP-S04MB2, must be installed in the master and, if possible, in each
satellite.
NOTE
LAN
Master Satellite
Max. 31 satellites
Satellite