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Certificate
Annex to Certificate of Conformity IECEx DEK 12.0050X, issue 2
Electrical data
Supply circuit (permanently connected cable):
in type of protection intrinsic safety Ex ib IIC or Ex ib IIIC, only for connection to a certified intrinsically safe
circuit, with the following maximum values:
V_1 (pin 2 and 6): U
V_2 (pin 1 and 4): U
V_3 (pin 5 and 8): U
V_4 (pin 3 and 7): U
Dependent on the internal construction, the weighing unit communicates either via RS232, RS485 or RS422
protocol.
RS485 circuit (Data Interface Connector, pins J/K/M):
in type of protection intrinsic safety Ex ib IIC or Ex ib IIIC, with the following maximum values:
U
i
I
i
***: resistively limited
P
= any; C
i
U
= 5.2 V; I
o
RS422 circuit (Data Interface Connector, all pins):
in type of protection intrinsic safety Ex ib IIC or Ex ib IIIC, only for connection to a certified intrinsically safe
circuit, with the following maximum values:
U
= 8.6 V; I
i
U
= 5.2 V; I
o
RS232 circuit (Data Interface Connector, pins A/J/K/N/M):
in type of protection intrinsic safety Ex ib IIC or Ex ib IIIC, only for connection to a certified intrinsically safe
circuit, with the following maximum values:
U
= 12.6 V* / 25.2 V**; I
i
U
= 10.0 V* / 20 V**; I
o
L
/R
= 140 µH/Ω;
o
o
*: versus ground; **: between lines; ***: resistively limited
Digital I/O signals (Data Interface Connector, pins G/F/E/D/O):
in type of protection intrinsic safety Ex ib IIC or Ex ib IIIC, only for connection to a certified intrinsically safe
circuit, with the following maximum values:
U
= 8.6 V; I
i
U
= 6.0 V; I
o
***: resistively limited
All intrinsic safe signals are directly connected to the earthed metal enclosure.
DEKRA Certification B.V. Meander 1051, 6825 MJ Arnhem P.O. Box 5185, 6802 ED Arnhem The Netherlands
T +31 88 96 83000 F +31 88 96 83100 www.dekra-certification.com Registered Arnhem 09085396
Signum 3 Ex
104
= 12.6 V; I
= 133 mA; P
i
i
= 12.6 V; I
= 133 mA; P
i
i
= 8.6 V; I
= 187 mA; P
i
i
= 12.6 V; I
= 150 mA; P
i
i
± 12.4 V
12.0 V
7.2V
130 mA ***
164 mA ***
Any
= 0.23 µF; L
= 0 mH;
i
i
= 210 mA; P
= 263 mW; C
o
o
= 210 mA; P
= 0.5 W; C
= 0.5 µF; L
i
i
i
= 290 mA; P
= 496 mW; C
o
o
= 328 mA***; P
i
i
= 101 mA***; P
o
o
= any; P
= any; C
= 0 nF; L
i
i
i
i
= 45 mA***; P
= 67 mW; C
o
o
= 1.46 W; C
= 188 nF; L
= 0.0 mH;
i
i
i
= 1.46 W; C
= 3 nF;
L
= 0.0 mH;
i
i
i
= 1.51 W; C
= 391 nF; L
= 0.0 mH;
i
i
i
= 1.68 W; C
= 223 nF; L
= 0.1 mH.
i
i
i
= 60 µF; L
= 0.6 mH; L
/R
= 125 µH/Ω;
o
o
o
o
= 0 mH;
i
= 60 µF; L
= 0.3 mH; Lo/Ro = 50 µH/Ω.
o
o
= any; C
= 2.2 nF* / 0.5 nF **; L
i
= 253 mW; C
= 3 µF* / 217 nF**; L
o
= 0 mH;
= 40 µF; L
= 20 mH; L
/R
= 530 µH/Ω.
o
o
o
o
= 0 mH;
i
= 3 mH;
o
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Form 124
Version 2 (2011-07)
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