U:\Hovedbibliotek\Produkter\Standard\Uniflo 1200\2. Kundemappe UK\8_Option
Board_Communication\8.1_communicatiom_controller\Communication_board_230210.doc
Page 12 of 15
Communication_board_230210.doc
Communication board to Communication board cable (Bus):
The cable used to connect Uniflo's has to confirm to the general cable requirements described in the
Installation Manual.
The cable has also to be shielded and the cross section of each wire has to be greater than 0,2mm
2
.
When mounting the shield please be aware of ground loops and respect the general requirements set out for
connecting electronic devices.
The Bus connection has been tested with a LIYCY 5*0.14mm
2
cable up to 100 meters.
5.0 Ex description
5.1 General
The Communication board can be used in a hazardous environment, but there are some limitations to its
use.
Powersupply Uniflo 1200: Use Ex power supply 0618605-000 Uniflo 1200 or Lithium battery.
Powersupply Uniflo 1100: Use only Lithium battery.
Reference to installation manual for Uniflo 1100 & 1200 fro choice of battery or “EX-powersupply installation
manual”.
First of all the Communication board has to be placed inside the Uniflo, in such a way, that there is at least
one option board distance to other option boards.
The "Output standard" has to be selected as "Optical" on the configuration page for the Communication
board.
The jumper on
XJ1 has to be removed
.
The T, R and C ports are the only ports that can be used in a hazardous environment.
5.2 Ex data
The Communication board is classified to ia IIC T3 together with the Uniflo 1100 and Uniflo 1200.
The outer marking of the Uniflo 1x00 cabinet determine the actual gas group for option boards.
Data for the T, R and C ports are:
Ui 10,7 V
Ii 109 mA
Pi 291 mW
Ci 1,5 nF
Li 1nH
5.3 Connection to external modem in nonhazardous environment
It's not possible to use the build in GSM/PSTN modem in a hazardous environment therefore the modem has
to be placed outside the hazardous environment.
The T, R and C terminals from the Communication board conforms to the 500 V test of clause 6.4.12 in EN
50020:2002. Connected to a modem in a nonhazardous environment use either a Zener barrier. (As an
example Zener barrier Z961 (Uo 9V, Io 91,8 mA) from Pepperl and Fuchs can be used) or isolated barriere.
More Communications boards can be connected parallel via the bus system in a hazardous environment.
The requirements and connections is the same as described in "Communication board to Communication
board cable (Bus)".
