Greenwich Instruments GO232 User manual

OPERATING INSTRUCTIONS
for
GO232 - RS232
UK
Greenwich Instruments Ltd
The Crescent,
Main Road,
Sidcup,
Kent, DA14 6NW.
Tele: 020 8302 4931
Fax: [phone]
USA
Greenwich Instruments (USA)
3401 Monroe Road,
Charlotte,
NC, 28205.
Tele: [phone]
Fax: [phone]
1 800 476 4070
NOTE
This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference
in residential installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particula
r
installation. If this equipment does cause harmful interference to radio o
r
television reception, which can be determined by turning the equipment of
f
and on, the user is encouraged to try to correct the interference by one o
r
more of the following measures:- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and the receiver. -
Connect the equipment to an outlet on a circuit different from that to which
the receiver is connected. -Consult the dealer or an experienced radio/TV
technician for help.
Visit our Web Site
http://www.greenwichinst.com
LF151

DESCRIPTION
NOTES
SETTING UP
GO232 - RS232
13 FEMALE 1
25 14
Pin DTE DCE
1
2
3
4
5
6
7
8*
20
No Connect
Tx
Rx
RTS
CTS
DSR
GND
DCD
DTR
No Connect
Rx
Tx
CTS
RTS
DTR
GND
DCD
DSR
Crop Crop
Crop
Crop
The GO232 is a low cost, full duplex
to 19200 baud fibre optic RS232
modem. It supports software
handshakes (Xon/Xoff), utilising up
to 100 metres of twin core 1mm
plastic fibre. The RS232C interface
is via a standard 25 way "D"
connector, available in male o
r
female types. DTE or DCE
configuration is selected by a switch
on the face of the GO232.
*TheGO232issuppliedwithapowe
r
unit (9 volts DC 200mA).
14 25
1 MALE 13 OPTO-ELECTRICAL CHARACTERISTICS
Transmitter at 25 C
Peak Output (typical) 1.5 mW/sr
Wavelength 660nm
Spectral Half Line Width 30nm
Life to Half Brightness (-3dB) (typical) 100,000 Hours
Peak Coupled Power (typical) -16dB after 1m of cable
Typical Power 70mA., at 9Volt DC.
Receiver at 25 C
Max. Sensitivity (typical) -36dB (at 660nm)
Saturation Level (typical) -16dB (at 660nm)
Spectral Range 380 -1100nm (S=10% Smax.)
Smax. Wavelength 850nm
Recommended Cable Attenuation 200dB/Km or less
( Toray PFU-CD 1002 or equivalent )
o
o
Check that the power units are the correct type for the country
of operation and if so connect to the mains.
Connect Power leads to the GO232s and check red powe
r
indicators illuminate.
Select DTE or DCE connector configuration. (Computers are
usually DTE configuration and peripherals DCE)
Route cable following manufactures recommendations
concerning required environment and minimum bend radius.
Take one end of the twin fibre and, using a sharp knife, cut the
fibres to give clean ends.
Loosen cable clamp bolt, and insert fibres into guide channels
noting which is Tx and Rx.
Once fibres are inserted and pushed fully home, tighten cable
clamp bolt.
Take remaining end of twin fibre cable and cut as in step 5
above and insert fibres into second GO232.
Connect to equipment. The GO232 has a conductive case and
by using the captive screws on the RS232 connector to fix it to
the equipment the electrical screening properties will be
improved.
* Pulled high by 5K1 resistor
1.
2.
3.
4.
5.
6.
7.
8.
9.
FIBRE CONNECTION DETAILS
Tx
Rx Rx
Tx
GO232 GO232