Yokogawa RAKD - Manual (Page 54)

<8. EXPLOSION-PROTECTED TYPE INSTRUMENTS>
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IM 01R01B30-00E-E 5th edition January 01, 2013 -00 All Rights Reserved. Copyright © 2003, Rota Yokogawa
8.4 Non incendive RAKD for Category 3 (ATEX) (/KN1)
Der RAKD with /KN1 is a unit with protection „nL”.
It may be used in hazardous areas of zone 2 (category 3)
The classification in brackets is given according to the EC- Directive ATEX, 94/9/EG.
This version is same hardware as intrinsically safe type.
Protection : Ex nL IIC T6 X
n = non incendive
L = unit with limited energy
Explosion proof : Ex nL IIC T6 X protection „n”; group II ; category 3GD
Marking :
II 3 GD
Entity parameter :
Table 8-3
Analog output Pulse output /CP Limit switch
/K1 ... /K3
Limit switch
/K6 ... /K10
Ui [V] 30 16 16 16
Ii [mA] 100 20 25 25
Pi [mW] 750 64 64 64
Li [µH] 730 0 150 100
Ci [nF] 2.4 0 150 30
Protection circuit for a power supply to meet the maximum values :
8.5 Dust proofed limit switches (ATEX) (/KS2)
Certification by Pepperl & Fuchs :
EC-Type Examination Certificate Nr.: ZELM 02 ATEX 0128X
Identification in accordance with regulation 94/9/EG (ATEX) :
II 1 D
Type of protection : Ex iaD 20
Maximum surface temperature : 108°C.
The dust explosion proof for the limit switches is only available if ordered without electronic transmitter (only with
housing type "T").
current limitation
R1 S1 = 200 mA F
+ Po = 0.7 W
to I o = 100 mA
D 1 = 27 V 5% 24V DC U o = 28.35 V
“nL” voltage - C o= 260 nF
limitation L o = 8.0 mH
- R 1= 300 W, 5%, 3W
F1.EPS
RAKD
Ambient temperature : -25 °C < Ta < 65 °C :