Yokogawa RAMC - Manual (Page 100)

<10. EXPLOSION-PROTECTED TYPE INSTRUMENTS>
10-8
IM 01R01B02-00E-E 10th edition January 01, 2013 -00 All Rights Reserved. Copyright © 2003, Rota Yokogawa
10.5 Intrinsically safe IECEx- certified components (/ES1)
10.5.1 Technical data
Data of electronic transmitter type -E, -H and -J :
The electronic transmitter is an intrinsically safe device. This device is certified for hazardous areas of zone 1
(category 2) und zone 2 (category 3). It is not homologated for zone 0 (category 1).
Certificate Nr.: IECEx PTB 12.0020
Applicable standards : IEC 60079-0: 2007 edition 5
IEC 60079-11: 2006 edition 5
Type of protection : Intrinsically safe Ex ia IIC T6 Gb
Ambient temperature : -40°C ... +70°C
Safety relevant maximum values:
Maximum voltage
: U
i
= 30 V
Maximum current (IIC) : I
i
= 101 mA
Maximum power : P
i
= 1.4 W
Inner inductance : L
i
= 0.15 mH
Inner capacity : C
i
= 4.16nF
Data of limit switches :
The following table shows the maximum safety parameters for intrinsic safe limit switches according the certificates
IECEx PTB 11.0091X (Standard) and IECEx PTB 11.0092X (Fail Safe).
Table 10.3
Standard /K1 ... /K3
Ex ia IIC T6
Fail Safe /K6 .../K10
Ex ia IIC T6
Type 2 Type 3 Type 2 Type 3
Ui [V] 16 16 16 16
Ii [mA] 25 52 25 52
Pi [mW] 64 169 64 169
Ci [nF] 150 150 30 30
Li [µH] 150 150 100 100
max. ambient temp. [°C] for T6 49 28 49 28
max. ambient temp. [°C] for T5 61 40 61 40
max. ambient temp. [°C] for T4 - T1 89 68 89 68
Intrinsic safe power supply for the electronic transmitter :
The power supply for the electronic transmitter is an associated apparatus that may not be installed in the hazard-
ous area, and it may not exceed the safety relevant maximum values for voltage, current and power of the elec-
tronic transmitter as specified above.
For example option /UT can be used.
Intrinsic safe power supply for the limit switches :
The power supply (transmitter relay) for the limit switches is an associated apparatus that may not be installed in
the hazardous area, and it may not exceed the safety relevant maximum values for voltage, current and power of
the connected limit switch as specified above.
For example the type KFA6-SR2-Ex... (option (W2_) according certificate IECEx PTB 11.0031 (230V AC supply)
or the type KFD2-SR2-Ex... (option (W4_) according certificate IECEx PTB 11.0032 (24V DC supply) can be used.