Approval/Certificate/Document of Conformity

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SCHEDULE
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to EU-Type Examination Certificate KEMA 09ATEX0168 X Issue No. 4
Page 2/3
Form 227A
Version 1 (2016-04)
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Description
The NAMUR Pulse Isolators for rail mounting, Type ACT20X-.HDI-.SDO-…-S (screw terminal) and Type
ACT20X-.HDI-.SDO-…-P (push terminal), are 24 V powered, isolating barriers, interfacing “Namur” sensors
or contacts located in an explosive atmosphere.
ACT20X-HDI-SDO-…-S and ACT20X-HDI-SDO-…-P
are one channel versions.
ACT20X-2HDI-2SDO-…-S and ACT20X-2HDI-2SDO-…-P are two channel versions.
Ambient temperature range -20 °C to +60 °C.
Marking
The equipment marking may additionally include the code II 3 G Ex nA nC IIC T4 Gc.
Electrical data
Supply (terminals 51, 52): U = 19,2 ... 31,2 Vdc
Digital outputs (terminals 41, 42 and 43, 44):
Transistor output, Umax = 30 Vdc, Imax = 80 mA (ACT20X-.HDI-.SDO-S and ACT20X-.HDI-.SDO-P)
Relay contacts, Umax = 30 Vdc or 32 Vac, Imax = 2 A (Types ACT20X-.HDI-.SDO-…-S, ACT20X-.HDI-
.SDO-…-P).
If the Pulse Isolator is installed outside the hazardous area, the following data for the relay contacts apply: U
≤ 30 Vdc or 250 Vac, I ≤ 2 Adc or Aac respectively.
Status output (terminals 53, 54):
Relay contacts, U ≤ 32 Vdc or 32 Vac, I ≤ 1 Adc or I ≤ 0.5 Aac respectively.
If the Pulse Isolator is installed outside the hazardous area, the following data for the relay contacts apply: U
≤ 110 Vdc or 125 Vac, I ≤ 0,3 Adc or I ≤ 0,5 Aac respectively.
For all circuits above: U
m
= 253 Vac (max. frequency 400 Hz).
Sensor circuits (terminals 11 ... 14, 21 ... 24):
in type of protection intrinsic safety Ex ia IIC/IIB/IIA/IIIC/I, with following maximum values:
U
o
= 10,6 V; I
o
= 12 mA; P
o
= 32 mW; C
o
= 2,0 µF (IIC) or 6,0 µF (IIB) or 18,0 µF (IIA) or 90 µF (I);
L
o
= 260 mH (IIC) or 780 mH (IIB) or 1000 mH (IIA) or 1000 mH (I);
L
o
/R
o
= 1150 µH/Ω (all groups);
For group IIIC, the parameters of group IIB apply.
The intrinsically safe sensor circuits are infallibly galvanically isolated from each other and from the non-
intrinsically safe circuits.
Installation instructions
The instructions provided with the product shall be followed in detail to assure safe operation.
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Report
Number
No. NL/KEM/ExTR09.0087/03.