FiberPlex FOI-4451 - Manual (Page 5)

Introduction
The FOI‐4541 and FOI‐4451 pair together to form a powerful balanced serial data transport solution. The DB‐
25 connectors are pinned out to directly support an EIA‐530 serial link. However due to the transparency and
flexibility of the design, the FOI‐4541/FOI‐4451 can be used as 6x4 independent 6 Mbps RS‐422 channels and
2x1 independent 256 Kbps RS‐232 channels.
This incredible versatility can solve a myriad of serial data communications problems. Your once limited serial
links can not only be consolidated but extended to over 20 Km on a single fiber pair. SCADA (supervisory
control and data acquisition), Telecommunications, Facility Automation and Control, even DMX Lighting
control applications can all benefit from the FOI‐4541/FOI‐4451.
For more advanced systems, a ‘Regeneration’ switch on the FOI‐4451 allows users to toggle between
synchronous applications that require Send Timing (ST) and asynchronous or synchronous applications that
require Terminal Timing (TT).
Key Features
 Compatible with:
o TIA/EIA‐530 (RS‐530)
o MIL‐STD‐188‐114A balanced type 1 and type 2
o FED STD 1030A
 Can alternately be used for
6x4 RS‐422 and 1x2 RS‐232
 An alternate interface (V.35 or RS‐232) may be installed at the opposite end, allowing the user to
create a link between two electrically incompatible interfaces without requiring a separate interface
converter.
 Supports tail circuit and null modem functions for DCE to DCE or DTE to DTE communications.
Requires two of the same FOI units
 EIA‐530 and RS‐422 channels support data rates from DC to 6.144 Mbps
 Can be used for up to 6 universes of DMX lighting control
Theory of Operation
By using a technology unique to FiberPlex products called ‘transparency’, we are able to use all the clock, data
and control channels of the standard EIA‐530 interface completely independently of one another. This
provides the ability to have (4) bi‐directional RS‐422 serial with (2) unidirectional RS‐422 and (1) bi‐directional
RS‐232 with (1) uni‐directional RS‐232, or even independently as (6) RS‐422 in one direction and (4) in the
other [6x4] and (2) RS‐232 in one direction and (1) in the other [2x1]. The table later in the manual shows how
these channels are pinned out.
Differences between FOI‐4541 and FOI‐4451
The FOI‐4541 has a female (sockets) DB‐25 connector and mates with the DTE.
The FOI‐4451 has a male (pins) DB‐25 connector, mates with the DCE and has clock regeneration functions.
Getting Started
Initial Inspection
Immediately upon receipt, inspect the shipping container for damage. The container should be retained until
the shipment has been checked for completeness and the equipment has been checked mechanically and
electrically. If the shipment is incomplete, if there is mechanical damage, or if the unit fails to operate notify
FiberPlex and make the shipping materials available for the carrier's inspection.