Specifications

December 2008 Page 1–7
Chapter 1. Product Description
1
devices. These circuits can be used for
Supervisory, Control, and Data Acquisition
(SCADA) and other data terminal communica-
tions requirements, and are especially useful when
extension of the SCADA communications lines to
remote sites is inconvenient or expensive.
1.14 High Speed Data Module
AV.35, RS449, or G.703 circuit is available by
use of the High-Speed Data Module (64V, 64R, or
64G). The signal is carried by 1 DS0 of a FOCUS
system. Settings for 56 or 64 kb are provided. The
6NR/6NV module may also be used and has the
added ability to carry multiples of 64kb data.
1.15 Contact Transfer Module
The Contact Transfer Module (CTR) provides
eight bi-directional contact closure circuits within
a 64 kbps DS0 channel. The CTR is ideal for
retrieving contact status of non-critical points.
1.16 Party Line Data Module
The Party Line Data (PLD) Module provides
“multi-drop” RS-232 data communications over a
single DS0 channel. It occupies one physical slot
on the FOCUS chassis. The module’s interface
has a single DB9 female connector for directly
connecting your RS-232 device.
The module is ideal for a variety of polled Remote
Terminal Unit (RTU) applications. The module’s
salient feature is its addressability, which lets you
use a single DS0 channel in a multi-node network.
This feature lets you send a message from the
master, or control, unit attached to the “head”
PLD module to a specific PLD module (and its
attached RS-232 device) in a multi-drop network.
The message passes transparently through the
other PLD modules in the network. Because only
one PLD module (or attached device) at a time is
communicating with the head PLD module (or
master unit), only one channel, or time slot, is
needed.
Using the FOCUS Configuration Software (FCS),
you can configure the module to operate in either
“internal” or “external” address mode. In internal
address mode, the module communicates directly
with a computer or other RS-232 device at a data
rate of 9600 bps. In external address mode, the
module may be connected to a variety of RS-232
devices (i.e. RTUs) communicating at 0–9600
bps.
1.17 Addressable Two-Wire
Voice (PBW/PBT) Module
The Addressable Two-Wire Voice Module adds an
“intelligent” orderwire capability to your FOCUS
system. It lets you use standard Dual Tone Multi-
Frequency (DTMF) telephones to selectively
(using user-assigned, three-digit extension
numbers) place calls between any two locations
(e.g., substations) within a FOCUS orderwire
network. It also provides an interface to your
company’s Private Branch Exchange (PBX). This
lets you replace any leased phone lines at these
locations with fiber optic channels provided by
your FOCUS system. Both voice and data
communication are supported.
The module comes in two types: the PBW and the
PBT. The PBW is an originating module; it is the
one to which you connect your telephones. The
PBT is a terminating module; it is the one to
which you connect an extension line from your
PBX. This connects your orderwire system — and
any stations (PBW modules) on it — to your PBX.
Both the PBW and the PBT modules occupy one
physical slot on the FOCUS chassis and provide
one orderwire channel using one DS0 time slot.
Both module types also use the same type of
interface, which provides both an RJ-9 jack and a
compression-type terminal block. This lets you
connect your telephone line or PBX extension line
either by plugging its RJ-9 connector into the RJ-9
jack or connecting its two-wire line directly to the
terminal block.