Specifications

December 2008 Page 1–3
Chapter 1. Product Description
1
1.5 FOCUS Modules
The FOCUS chassis is divided into common
equipment modules and optional channel
modules. A sample chassis layout is shown in
Figure 1-1. Module descriptions, with component
location diagrams for each module and their inter-
faces, are in their respective chapters.
1.6 Features
FOCUS is a communications multiplexer specifi-
cally designed for utility and industrial
substations. All facets of the design were engi-
neered with utility applications in mind. Some
major features of FOCUS include:
Drop/Insert — FOCUS eliminates the back-
to-back channel banks and associated
wiring, reducing installation costs, simpli-
fying configuration changes, and
increasing bandwidth utilization.
T1/E1 Electrical and Optical Interfaces —
The system is flexible in that both direct
fiber and electrical T1/E1 outputs are
available. The chassis provides two dual
transceiver slots, allowing either for two of
the four T1/E1 ports to be optical, and the
other two electrical, or for all four ports to
be either optical or electrical. This provides
a seamless digital interface between direct
T1/E1 fiber optic channels and higher order
(T3 or SONET) optical systems or digital
Microwave. You can switch between Fiber
and electrical T1/E1 output by substituting
transceiver modules.
Diagnostics — Every module is being contin-
uously checked and trouble reported to
simplify preventive maintenance. This
significantly reduces the time to diagnose
and repair FOCUS. A status LED on each
module provides visual indication of the
module’s status.
Extended Temperature Range — FOCUS is
built to operate in the substation environ-
ment with a temperature range from -20 to
+60 degrees C.
Simple Repair and Increased System
Availability — Repairs can be performed
by module substitution without having to
rewire circuits or reconfigure time slots. All
channel modules can be replaced with
power on, eliminating the need to shut
down unaffected communication links for
repairs.
Surge Withstand Capability — FOCUS
exceeds all applicable ANSI & IEC
standards for surge withstand and fast
transient immunity.
Station Battery Compatibility — FOCUS,
like all relaying equipment, can connect to
any common station battery voltages, elim-
inating the need for outboard isolation and
conversion equipment. The battery may be
ungrounded, positive grounded, or negative
grounded. Powered from common dc & ac
voltages (24Vdc, 48/60Vdc,
110/125Vdc/Vac & 220/250Vdc/Vac.
Redundancy — Standby power supplies
increase overall reliability and availability.
System redundancy is also increased by the
use of system loops, or hot standby fiber
transceivers, with separate optical paths.
Isolation from EMI/RFI — FOCUS
provides isolation from EMI and RFI in
line with the IEEE standard, C37.90.2.
Ease of Configuration — The software and
hardware configuration of FOCUS can be
easily customized to specific applications,
reducing the applications cost. You can
totally configure the system hardware
using the FCS software on your PC.
Expansion Flexibility — FOCUS can be
easily changed or expanded at any time
which reduces installation costs and system
downtime.
Remote Operation — Access to system
alarms, events, and configuration is
possible from any node in the system.
Ring Network Capability — You can
configure your FOCUS system in a loop
with options for redundancy