Yokogawa RAMC - Manual (Page 102)

<10. EXPLOSION-PROTECTED TYPE INSTRUMENTS>
10-10
IM 01R01B02-00E-E 10th edition January 01, 2013 -00 All Rights Reserved. Copyright © 2003, Rota Yokogawa
10.6 Intrinsically safe IECEx- components for category
3G (/ES3)
10.6.1 Technical data
Data of electronic transmitter type -E, -H and -J :
The electronic transmitter is an intrinsically safe device. This device is use for hazardous areas of category 3.
Applicable standards: IEC 60079-0: 2007 edition 5
IEC 60079-11: 2006 edition 5
Type of protection : Intrinsically safe Ex ic IIC T6 Gc
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 10.4
Standard /K1 ... /K3
Ex ic IIC T6 TX
Fail Safe /K6 .../K10
Ex ic IIC T6 TX
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.