Black Box MED101A Quick Start Manual

Documentation Number – MED101A_1009qsg PN8460-r000

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 MED101A Fiber Optic Converter
 This Quick Start Guide
 Additional Items Required but not included

o A 10 to 48 VDC Power Supply.
o Serial Cable.
o Multi-Mode Fiber Optic Cable with ST

Connectors (62.5 / 125 micro-meter).

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1. Power requirements are10 to 48 VDC @ 0.2A Follow polarity
shown on label.

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RS-485 2-Wire

Quick Start Guide

Put

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Pre-defined timeouts are set using switches 8 through 11.
Resistor selectable baud rates are set by inserting a
through-hole resistor (R-9) on the circuit board.

Timeout selections are equal to one character time at the
indicated baud rate. Setting the converter to 9600 will
generally work at 9600 and higher baud rates. In RS-422

mode, timeouts are not required.

MED101A

Triple Isolated RS-232 to

Multi-Mode Fiber Converter

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Black Box Corporation – 1000 Park Drive – Lawrence, PA 15055-1018

Tech Support and Ordering: 724-746-5500 – FAX: [phone]

To contact us about Black Box products or services: [e-mail]

Documentation Number – MED101A_1009qsg PN8460-r000

Black Box Corporation – 1000 Park Drive – Lawrence, PA 15055-1018

Tech Support and Ordering: 724-746-5500 – FAX: [phone]

To contact us about Black Box products or services: [e-mail]

RS-422/485 4-Wire

RS-232

Multi-drop Ring

Maximum Converters in a Multi-drop Ring

Baud Rate

RS-232

RS-422/485

≤19.2 kbps 32

32

37.4 kbps

16 24

115.2 kbps

2 8

Use 62.5/125 micro-meter
multi-mode fiber optic cable
with ST connectors.

Set DIP Switch position 12 to ON.
Connect FO transmitter to FO

receiver and vise versa.
NOTE: Fiber optic transmitter

light is ON in the idle state

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1. Configure the converter for RS-232.

2. Set DIP Switch position 12 to OFF.

3. Cross connect the fiber optic transmitter to the fiber optic
receiver.

4. Connect a PC to the serial port.

5. Using hyper terminal or similar program, connect to the
appropriate COM port. Ensure hyper terminal local echo is
off.

6. Transmit data. If the same character string is returned, the

test is good

.

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Point-to-Point