Operating Instructions Combics CAIXS2 155
FM Certificate
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FM Approvals HLC 5/13 3049923C
Page 2 of 4
Ui
±12.4 V 12 V 7.2 V
Ii
130 mA*** 164 mA*** 3.3A***
Rmin
95.4 Ω 73.2 Ω 2.2 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 CAIXS2-…. (COM1)
Circuit Uo Io Po Co Lo Lo/Ro
RS232 10.0 V* 101 mA*** 253 mW 3 μF* 3 mH 140μH/Ω
20.0 V** 217 nF**
RS422 5.2 V 290 mA 496 mW 60 μF 300 μH 50μH/Ω
RS485 5.2 V 210 mA*** 263 mW 60 μF 600 μH 125 μH/Ω
Digital I/O 6.0 V 45 mA*** 67 mW 40 μF 20 mH 530 μH/Ω
Input/Output parameters for the WP Board
Circuit Uo Io Po Co Lo Lo/Ro
RS485 5.4 V 74 mA*** 183 mW 50 μF 600 μH 135 μH/Ω
Ui Ii Pi Ci Li
±12.4 V 130 mA*** † 260 nF 0 mH
12.0 V 164 mA***
6.0 V 3.3 A***
***: 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
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