VS300 Pre-installation Manual Planning for control and monitoringIssue 2.0 2010-12-01 Page 8-9Web based AUI controlAn Ethernet port is available on the LAN connector (A1J8A) on the rear panel of the transmitter. Thisport allows a user with proper authentication to remotely control and interrogate the VS300’soperational status. All functionality available on the front panel UI and more is available remotely,provided the user has been granted proper authorization (refer to the VS300 Operations andMaintenance Manual for details on setting user permissions). Nautel recommends you use shieldedCategory 5 Ethernet cable to make this connection.Email serverThe transmitter’s remote AUI allows you to configure an email notification feature, which can initiateemails to specified users when specific alarm or status conditions occur (refer to the VS300 Operationsand Maintenance Manual for details).The transmitter’s email service expects to be connected to an unsecure email server (i.e., not requiringa password to gain access). If you plan to use the email notification feature, make sure you have asecure network for your email server and the transmitter.External interlockAn external safety interlock is available between pins 19 and 20 on the REMOTE I/O-A connector(A1J2A) on the rear panel of the transmitter. This connection allows you to connect an externalsafety interlock circuit that provides an emergency RF inhibit control for the VS300. It must presenta short circuit (low impedance) between the terminals when the interlock circuit is intact and it is safeto enable the RF output. It must present an open circuit when any interlock switch is activated andthe RF output should be inhibited. You can install any number of serial interlock switches.