Chapter 5: Installation
136 EST3X Technical Reference Manual
Failover operation
To address the possibility of a communication failure or device trouble, you can
create a failover operation in the 3-SDU for the 3-MODCOM. Failover operates
by enabling and disabling various accounts defined for the project. On detection
of a fault or trouble, project rules disable accounts on the failed 3-MODCOM and
enable matching accounts on the backup 3-MODCOM.
Failover operation results in a system that is resistant to trouble arising from
telephone lines, 3-MODCOMs, or the SFS1-CPU module. The operation can be
limited to a single panel or can span two or more panels anywhere in a network.
In systems with a single 3-MODCOM you can include a second 3-MODCOM that
acts as a redundant unit. In systems with two or more 3-MODCOMs, you can
program the system so that the units back up each other, while still handling their
normal traffic.
Monitoring and diagnostics
See “LED indicator diagnostics” on page 180 for the LED states.
Connecting a PT-1S serial printer
The PT-1S serial printer can be connected to an EST3X control panel to provide
a printout of system events such as status changes, active events, and reports.
The printer is an 80-character line width, freestanding printer that uses standard
form feed paper.
Figure 34: PT-1S serial printer
An illustrated setup guide that contains detailed instructions for assembling the
printer, installing the print drivers, and performing other tasks is included with the
printer. Refer to the guide when unpacking, assembling, and setting up the
printer. A user guide is provided on the CD included with the printer. Refer to the
user guide for instructions on using the front panel to configure printer settings.
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