Minebea Intec Combics 2 Mode D'emploi page 149

Annex to IECEx FME 13.0005X issue No.:8
†: Any; The input power from the SIWXS... or ISX... is not critical to the CAIXS2-.... As the circuit is
resistively limited at the input. A consideration only needs to be taken for the cable parameters and
that will be defined by the SIWXS... or ISX....
Rmin of the external intrinsically safe circuit is defined by Ui/Ii and is:
Ui +12.6V 12.0V
Rmin 95.4 Ω 73.2 Ω
Circuit Uo Io
RS232 10.8 V* 110 mA***
21.6 V** 55 mA
Ui Ii
12.6 V* 328 mA***
25.2 V**
*: versus ground; **: between the lines. ***: resistively limited
†: Any; The input power from the SIWXS... or ISX... is not critical to the CAIXS2-.... As the circuit is
resistively limited at the input. A consideration only needs to be taken for the cable parameters and
that will be defined by the SIWXS... or ISX....
DMS Front End Board
Uo Io Po
11.8 V 147 mA 1.49 W
Connections to the UNICOM RS Board
Circuit Ui
RS232 12.6 V*/25.2 V**
RS422 8.6 V
RS485 see below
*: versus ground; **: between the lines; ***: resistively limited
For the RS485 communication:
Ui ±12.6 V
Ii
135 mA***
Rmin 95.4 Ω
RS485 (Rmin = Ui/Ii is the minimum output resistance of the combined circuits of the associated
apparatus connected to the CAIXS2-....)
Output parameters of the UNICOM RS Board
Circuit Uo Io
RS232 10.0 V* 101 mA***
20.0 V*
RS422 5.2V 165 mA
FM Approvals Ltd.
1 Windsor Dials,
Windsor, Berkshire, UK. SL4 1RS
T: +44 (0) 1753 750 000 F: +44 (0) 1753 868 700
www.fmapprovals.com
6.0V
2.2 Ω
Po Co
295 mW 2.14 µF
174 nF
Pi Ci
† 3 nF
0.5 nF
Co Lo
770 nF 300 µH
Ii Pi
328 mA*** any
210 mA 0.5 W
see below any
12 V 7.2 V
164 mA*** any
73.2 Ω 0
Po Co
253 mW 3 µF*
217 nF**
292 mW 60 µF
Page 2 of 3
Lo Lo/Ro
2 mH 120 µH/Ω
Li
0 mH
Ci Li
0 µF 0 mH
11.22 µF 0 mH
0 µF 0 mH
Lo Lo/Ro
3 mH 140 µH/Ω
1 mH 75 µH/Ω
Mode d'emploi Combics CAIXS2
IECEx Certificat
149