Incendive Inputs And Outputs; Temperature Rating - Mettler Toledo PANTHER Guia De Instalacion

Incendive Inputs and
Outputs

Temperature Rating

•
Profibus Interface
V = 5.5 VDC
t
I = 171 mA
t
C = 218 µF
a
L = 0.45 mH
a
If a specific input or output is rated incendive, then special wiring precautions must be taken
to protect the wiring in the Division 2 area. Refer to the electrical regulations for the country
of installation for specific wiring requirements.
All inputs and outputs to the PANTHER panel-mount unit not listed above as non-incendive
must be treated as incendive. They include:
•
AC power input
•
Discrete inputs and outputs
•
Allen Bradley RIO
•
Modbus Plus interface
It is important that the temperature rating of the PANTHER panel-mount terminal be
appropriate for the environment in which it will be used. FM has approved the PANTHER
panel-mount terminal for a temperature rating of T4a. This indicates that the maximum
surface temperature of the terminal will not exceed 120°C (248°F). This value must be
lower than the Auto Ignition Temperature (AIT) of the hazardous product in order to be safe.
If the AIT of the hazardous product is lower than the T4a rating of the PANTHER panel-mount
terminal, the panel-mount terminal MUST NOT BE USED in that environment.
THE PANTHER PANEL-MOUNT TERMINAL HAS A
TEMPERATURE RATING OF T4a (120
USED IN AREAS WHERE THE AUTO IGNITION TEMPERATURE
OF THE HAZARDOUS MATERIAL IS BELOW THIS RATING.
Chapter 2: Installation

Incendive Inputs and Outputs

WARNING
°
C). IT MUST NOT BE
(7/03) 2-3