Operating Instructions Combics CAIXS2 167
FM Certificate
FM APPROVALS PROJECT NO: 3049923
Page 6 of 10
***: resistively limited
†; Any. The input power from the SIWXS… or ISX… is not critical to the CAISX2-…. as
the circuit is resistively limited at the input. A consideration only need 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 ±12.4V 12.0V 6.0V
Rmin 95.4Ω 73.2Ω 2.2Ω
Circuit Uo Io Po Co Lo Lo/Ro
RS232 10.8 V* 110 mA*** 295 mW 2.14 μF 2 mH 120 μH/Ω
21.6 V** 55 mA 174 nF
Ui Ii Pi Ci Li
12.6 V* 328 mA*** † 3 nF 0 mH
25.2 V** 0.5 nF
*: versus ground; **: between the lines; ***: resistively limited
†; Any. The input power from the SIWXS… or ISX… is not critical to the CAISX2-…. as
the circuit is resistively limited at the input. A consideration only need to be taken for
the cable parameters and that will be defined by the SIWXS… or ISX….
DMS Front End Board
Uo = 11.8 V
Io = 147mA
Po = 1.49 W
Co = 770 nF
Lo = 300 μH
1.4.3 ATEX Listings
Hazardous Location Equipment - Europe (ATEX) Transmitters Pressure
CAIXS2-ab Intrinsically Safe Indicator
FM13ATEX0085X
II 2 G Ex ia IIC T4 Gb -10°C ≤ Ta ≤ +40°C
II 2 D Ex ia IIIC T80°C Db -10°C ≤ Ta ≤ +40°C
a = U or V or blank
b = blank or up to three numbers (not relevant to safety)
Specific Conditions of Use
1. The front panel of the intrinsically safe indicator type CAIXS2-…. is non-metallic
and shall not be used where UV light or radiation may impinge on the enclosure.
2. The device shall be installed in such a way that it is protected against the entry of
solid foreign objects or water capable of impairing the safety of the apparatus. Reduce
the risk of mechanical damage to a minimum.
3. After the first installation, the gasket must be replaced each time the enclosure is
opened.
Electrical Parameters
Connections to the DC Supply Adapter Cable
Circuit Ui Ii Pi Ci Li
V_1 12.6 V 133 mA 1.46 W 188 nF 0.0 mH
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