Specifications

Copyright © AMETEK
18
18.1 Description
The 64K high speed data module communicates
with an EIA RS-530/422 (64R) or V.35 (64V) data
terminal running at either 64 kbps or 56 kbps. RS-
422 is electrically compatible with RS-449. Table
18-1 shows the module’s specifications. The 64K
Module provides one data channel operating over
one DS0.
18.2 Application
Communication between this channel module and
any data terminal must be synchronous, and the
data terminal must sync to the clock generated by
the 64K module. This channel module also has a
fiber optic transmitter and receiver to communi-
cate with the ABB REL350

relay at 64 kbps over
a few hundred feet of multimode glass or plastic
fiber optic cable.
The fiber optic connections are established on the
module itself with ST connectors, whereas the
metallic connections are made on the interface
modules (64R/G or 64V) at the back of the
FOCUS chassis. When using fiber optics, the data
protocol must be self clocking. Non Return to
Zero Inverted (NRZI) is the protocol used for the
fiber connection.
The associated interface modules are conveniently
designed with a standard DB25 female connector
for easy connection to other devices/equipment.
The 64R/G interface module provides connection
for EIA RS-530/422 interfacing, while the 64V
provides connection for V.35 interfacing.
In addition, the 64KFE fiber optic extension (the
64F “interface module”) is available for use with
the RFL 9300 Charge Comparison Relay. For a
complete description of the 64KFE fiber optic
extension, its associated modification kit, and
detailed installation instructions, please see the
“FOCUS 64KFE Fiber Optic Extension & RFL
9300 Modification Kit” section later in this
chapter.
18.2.1 Connections to SEL 311L
The pinouts for connections to an SEL 311L relay
are shown in Figure 18-11.
18.3 Installation
As with other FOCUS modules, we recommend
that you initially install and test the 64K module
and interface in a “test” chassis (i.e., one that is
not part of an operating network). This way, you
can quickly perform the acceptance test without
interfering with a live network. Whether you are
installing the module in a test chassis or a chassis
that is on line in a network, use the installation
procedure described here.
The 64K module occupies one chassis slot and
one time slot. Before installing the module and its
interface, make sure that:
• The FOCUS chassis is set up, energized,
and operational, with all necessary
common equipment (see Chapter 3)
• The FOCUS Configuration Software (FCS)
has been installed on your terminal (see
Chapter 3)
• Acceptance tests for the FOCUS chassis
and all previously installed equipment have
been done to rule out invalid test results for
this module
• FCS is up and running (see the FCS online
help facility: FOCUS Configuration
Software > Starting FCS)
18.3.1 Hardware Installation and
Connections
To install the 64K module and a 64V or 64R/G
interface module, complete the following steps.
1. Bring the FOCUS chassis “on line”.
Click on the “Online” speed button
.
This uploads to the FCS the current status,
settings, operating statistics, etc., for the
FOCUS chassis — and the 64K module.
18. High Speed Data (64R, 64V, 64K) Module