Installation manual

Introduction
1–6 153396 Revision D
This manual is for use by qualified installers only
Auxiliary Control Interface
The Xantrex GT250 has provisions within the AC interface for installing auxiliary
control signals, for example, a remote E
NABLE/DISABLE signal.
Auxiliary control via the remote E
NABLE/DISABLE signal is advantageous for
coordination of the Xantrex GT250 at specific installations where a pre-existing
back-up emergency generator is present.
A dry contact circuit at the TB7 terminal is used for remote control of the input
signals. Circuit termination and signal type are identified in Table A-8 on page A–6.
Communications Circuit
The Xantrex GT250 can be remotely accessed through an RS232 serial port or
through an RS485/Modbus connection. Schneider Electric offers modems that
can be connected to the RS232 port for remote monitoring. The remote user has
the ability to control and monitor the status of the inverter through this
connection.
Alternatively, a user selectable RS485/Modbus connection is also available for
remote plant monitoring. The CCU2 controller board within the Xantrex GT250
may be configured for RS485 serial communication using the Modbus protocol.
This enables users to monitor and control the inverter from a dedicated plant
wide monitoring system.
Figure 1-4 Remote Control Terminal Connections