Specifications

Page 3–4
FOCUS System Manual
directly to the DS1 interface, labeled “P2,” on the
motherboard.
In addition to the system connections, you must
also connect the proper wiring to the channel
module interfaces, which are plugged into the
connectors on the right-hand side of the mother-
board. On their “inside” face, these interface
modules all have the same DIN connector, so that
you can connect them to the back of the mother-
board. On the side facing out, however, they have
various types of connectors on them, depending
on the type of channel modules being used and the
application.
The compression-type terminal block, which are
present on several of the interface modules, accept
a wire size of 14 awg maximum, though 16 or 18
gauge is preferred.
3.2.3 Expansion Chassis
A second, or expansion, chassis is necessary when
your application requires more channel modules
for a single chassis than will actually fit in it. If
you install an expansion chassis, you must mount
it directly above (or below) the main chassis. To
connect the expansion chassis, locate the special
connector cable supplied with the expansion
chassis and connect it to the blue connector
labeled “P1 EXPANSION” on both chassis.
3.2.4 Configuration and Startup
Once the hardware is installed and the wiring
connected, the next step is the software configura-
tion. To configure the FOCUS system and the
individual channel modules, you must first install
the FOCUS Configuration Software (FCS) on a
PC and connect the PC to the FOCUS chassis,
using a standard RS-232 extension cable.
3.2.5 Acceptance Tests
As noted previously, we recommend that you
initially set up and, if necessary, assemble each
chassis and install each uninstalled module in a
test environment, attach any necessary wiring and
cables, and perform the recommended acceptance
tests before installing the chassis or module in an
operating network. This means that you might
have to complete some of the wiring and connec-
tions twice, once for the acceptance tests and once
for the actual on-line installation.
Complete, step-by-step instructions for testing an
assembled chassis and all installed equipment are
provided in Chapter 4. Complete, step-by-step
instructions for the individual (system or channel)
modules are provided both in Chapter 4 and in the
chapters for the individual modules.
3.3 Hardware Installation and
Connections
This section provides assembly and installation
instructions for your FOCUS chassis and common
equipment. The instructions are broken down into
the following major steps:
1. Connecting the power cables
2. Connecting the inter-node (transceiver)
cables
3. Installing the common equipment
4. Energizing the chassis
5. Installing channel modules
6. Installing channel module interfaces
Note that when you perform the recommended
acceptance tests, as described in Chapter 4, you
will already have completed most of these steps. If
so (and if you have not disassembled the chassis in
the meantime), just complete the remaining steps.
This will typically include Steps 1, 2, 4, and 7
above.
To assemble your FOCUS chassis, complete the
following steps:
1. Connect the power cables.
If you have a single Power Supply Module,
connect the wiring from the ac or dc power
source to screws 1 and 2 on the terminal block
on the Power Supply Interface on the rear of
the chassis (see Figure 3-1). For convenience,
these positions are labeled MAIN POWER.
You must also connect the ground screw to an
electrical ground using a dedicated wire. The
power supply connection is not polarity
sensitive for any voltage rating.