Technical data

49
W&T
Serial Fiber Optic Interfaces
Subject to error and alteration
Interface FO <> 20mA #41210
Function
The W&T Interface 41210 allows bi-directional conversion of an
20mA interface into a fiber optic interface with a transmission
speed of up to 19.200 bps. The interface works independently
of the data format used and converts one data line in each
direction.
Connectors
The fiber optic cables are connected to the converter using ST
series connectors, with a DB9 plug for the 20mA connection.
The arrangement of the signal connectors on the front panel of
the interface can be seen from the following illustration:
Serial Port
Power LED
Data LED
TxD RxD
Fiber optic
ST connectors
The pin configuration for the serial connector is shown in the
following table, and may also be found on a sticker attached to
the device:
pin# signal
1 Data Out 20mA
2 Data Out +
3 Data Out -
4 Data Out GND
5 Half Duplex Control
6 Data In 20mA
7 Data In +
8 Data In -
9 Data In GND