266CRH / 266CRT, 266CSH / 266CST MULTIVARIABLE PRESSURE TRANSMITTER | OI/266CXX/MODBUS-EN REV. A 11
Type of protection:
Certification
(Code ET)
The 266 transmitters have FM certification for the following
hazardous location protections:
Code ET ratings
Non-Incendive
(US and Canada)
Class I, Division 2, Groups ABCD, T*
in accordance with Non-Incendive field wiring
requirements for hazardous (classified)
Non Sparking
(US and Canada)
Class I, Zone 2, (A)Ex nA IIC T*
in accordance with Non-Incendive field wiring
requirements for hazardous (classified)
T* Temperature class T is dependent on the maximum input current and the
maximum ambient temperature per table Temperature class definitions
• Type 4X applications Indoors/Outdoors
• ಫSealಬ per ANSI/ISA 12.27.01 as indicated in the certificates
Temperature class definitions
Tclass T
amb
min. T
amb
max. U
ma
Power
T4 Æ50 °C 85 °C 30 V 100 mA 0.75 W
T4 Æ50 °C 70 °C 30 V 160 mA 1.00 W
T5 Æ50 °C 40 °C 30 V 100 mA 1.75 W
T6 Æ50 °C 40 °C 30 V 50 mA 0.40 W
WARNING
• When installed, power must be supplied to the transmitter
by a voltage limiting device which will prevent the rated
voltage of 30 V DC being exceeded.
• The temperature sensor circuit (Pt100) must be connected
in accordance with the requirements of the FM certificate.
Note
When the temperature under rated conditions is higher than
60 °C at the entry point or 60 °C at the branching point of the
conductors, the temperature specification of the selected cable
and cable gland shall be in compliance with the actual measured
temperature.