17
Subject to error and alteration
W&T
Universal Fiber Optic Interface Converter
Universal FO Interface RS232/RS422/RS485, #81215
Function
The W&T fiber optic interface converter 81215 allows
bi-directional conversion of an RS232, RS422 or RS485
interface into a fiber optic interface with a transmission speed
of up to 500.000 bps.
The interface works independently of the data format used
and converts one data line in each direction.
Well-known SC connectors are used for connecting the glass
fiber optic cable, whereas the serial interface is configured as
a 9-pin SUB-D connector.
Power Supply
The supply voltage for the Interfaces is provided through an
integrated switching regulator. This regulator has a variable
input voltage range and allows the Interface to be powered by
any DC voltage between 12 and 48 volts.
The supply voltage is polarity reversal protected and can be
connected on the underside of the Interface through the inclu-
ded plug-in screw terminal.
Galvanic isolation and ESD protection
The serial port of the fiber optic converter is galvanically
isolated from the supply voltage through a DC/DC converter
with an isolation voltage of 1kV. All signal lines for the serial
interface are protected by ESD-immune interface chips against
static discharge for voltages up to 15 kV corresponding to IEC
801-2, Level 4.
