Union Switch & Signal GENISYS II, Hardware Installation

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GENISYS II System Hardware Installation UNION SWITCH & SIGNAL
SM-6900B Rev. 0.0 August 1999 2-17
2.4 CIRCUIT BOARD CONNECTIONS TO EXTERNAL CIRCUITS
The configuration of the external wiring to each GENISYS II printed circuit board depends
entirely on the board type and the selected application. Sections 2.4.1 through 2.4.5 detail the
specific connection requirements for each type of GENISYS II circuit board.
2.4.1 CPU Board
The CPU board contains the central controlling logic and diagnostic monitoring for the
GENISYS II system and provides five serial data ports. Four of these ports are used for
communication with external systems (see Figure 2-8). The fifth port enables the connection of a
laptop PC for software maintenance, diagnostics, and data log downloading. This maintenance
port is terminated at the 9-pin connector on the CPU board front panel. The maintenance port
connections may optionally be redirected using on-board jumpers to replace TXD, RXD, and
COM for serial port 4 on the top rear connector.
The four general-purpose ports can be used for non-vital serial communications with a
MICROLOK II system, a MICROLOK system, a MICROTRAX End-of-Siding system, or any
other GENISYS system. For installations where the GENISYS II system is communicating with
another protocol-compatible system in the same house or case, the only restriction is that the
connected units be powered by the same battery.
For locations where the GENISYS II system and the remote system are located in different cases
or houses, US&S recommends the use of a serial communications adapter panel (N451460-
3001). This device converts EIA-level signals to 20mA current loop signals and is designed to
protect signal lines from transient line noise. Serial communications adapter panels are required
at both the GENISYS II location and the remote location. Refer to Section 3.3 for panel
installation and wiring.