Title: Hardware Installation Guide.pdf
To install the Star Multiplexer, perform the installation procedures described in the following sections, in the order in which they are presented. Then be sure to configure the board in the access control system.90.1Wiring1. Wire the upstream host communication.2. Wire the downstream device communication.3. Wire the power input.90.1.1Upstream Controller CommunicationThe Star Multiplexer can communicate to the Intelligent System Controller by one of four downstream ports, either by RS-485 (2-wire) communications or RS-232 to RS-485 converters. The recommended configuration is with RS-485 (2-wire) communications.