Scope; Use; Special Conditions Of Safe Use; Sealing - Mettler Toledo Precision Junction Box AJB Serie Manual De Instalación

10.3 Scope

Precision Junction Box AJB641SX, AJB841SX

10.4 Use

These products are capable for use in hazardous areas Zone 1/21 and Zone 2/22.
Entity parameters for Cat 2 installation:
Ui=17.3V
Ui=8.6V
Entity parameters for Cat 3 (Ex ic) installation:
Ui=17.3V
For Cat 3 (EX nA or Ex tc
Ui=30V

10.5 Special Conditions of Safe Use

The Junction Boxes shall be installed in such a way that the risk of mechanical danger is low, ambient temperature range -20°C to +60°C.
The specified temperature T70°C to T90°C for application in explosive atmosphere caused by air/dust mixtures is based upon an ambient
temperature of 40°C or 60°C respectively.
For application in explosive atmospheres caused by dust, electrostatic charges of the marking label on the enclosure shall be avoided.
For intrinsically safe operation, the use of a resistively-limited Intrinsically Safe Load Cell Barrier with appropriate entity parameters, such
as METTLER TOLEDO ISB05000 or ISB15000, must be used.

10.6 Sealing

For unsused conduits only se supplied blind plugs with hazardous marking.

10.7 Marking

Check respective box with permanent marker or similar means. See sample below.
30766399D Precision Junction Box
li=302mA Pi=1W Ci=Li=0 (Matches 15V ISB Barrier)
li=300mA Pi=340mW
li=302mA Pi=1W Ci=Li=0 (Matches 15V ISB Barrier)
li=1mA
Ci=Li=0 (Matches 5V ISB Barrier)
5
Optional Procedures