Iecex - 'Ex I' And 'Ex N' Type Of Protection - ABB TZIDC Commissioning Instruction

20 TZIDC, TZIDC-110, TZIDC-120 DIGITAL POSITIONER | CI/TZIDC/110/120-EN REV. E
... 2 Use in potentially explosive atmospheres
... TZIDC-120 – Ex relevant specification
Special conditions
• Devices must only be connected to circuits in zone 2 if they
are suitable for operation in zone 2 potentially explosive
atmospheres and for the conditions prevailing at the
installation location (manufacturer's declaration or
certificate from an inspection authority).
• For the 'digital feedback with proximity switches' circuit,
external measures must be implemented to prevent the
rated voltage from being exceeded by more than 40 % in the
event of transient disturbances
• It is only permissible to connect, disconnect, and switch live
circuits during installation or maintenance, or for the
purpose of carrying out repairs. Note: It is considered very
unlikely that a potentially hazardous atmosphere would be
present in zone 2 at the same time that installation or
maintenance or repair work was being carried out.
• Only non-flammable gases may be used for the pneumatic
power supply
• Only suited cable entries must be used that meet the
requirements of EN 60079-15.
IECEx – 'Ex i' and 'Ex n' type of protection
Ex marking
Marking
Type Examination Test Certificate
Shown as
Type
Standards
Temperature Data
Temperature class
T4
T6
Electrical Data
TZIDC-120 for ia / ib / ic with Ex i IIC T6 or T4 Gb marking
With the intrinsically safe Ex i IIC type of protection, only for
connection to a certified FISCO power supply unit, a barrier or a
power supply unit with linear characteristic curves and the
following maximum values:
Current circuit (terminal)
Signal circuit
(+11 / −12) or (+ / −)
Ex ia IIC T6 or T4 Gb
Ex ib IIC T6 or T4 Gb
Ex ic IIC T6 or T4 Gc
Ex nA IIC T6 or T4 Gc
IECEx TUN 04.0015X
Intrinsic safety 'I' or Type of protection
IEC 60079-11
IEC 60079-15
Ambient temperature Ta
TZIDC-120 Ex i IIC TZIDC-120 Ex nA IIC
−40 to 85 °C
−40 to 40 °C
Electrical information (maximum values)
Characteristic curve: linear
5
'n'
IEC 60079-0
−40 to 85 °C
−40 to 50 °C
U = 24 V
i
l = 250 mA
i
P = 1.2 W
i