Mechanical Data; Thermal Data; Installation - Vega VEGAMET Serie Instrucciones De Seguridad

Intrinsically safe circuit
Supply and signal circuit:
4 ... 20 mA sensor 1: Terminals 1[+], 2[-]
In addition only VEGAMET 862:
4 ... 20 mA sensor 2: Terminals 4[+], 5[-]
Ex ia
Permissible external inductance L
Permissible external capacitance C
The intrinsically safe circuits of VEGAMET 841, 842, 861, 862 are galvanically separated from
ground.
The intrinsically safe circuits of the VEGAMET 841, 842, 861, 862 are reliably separated from the
non-intrinsically safe circuit up to a peak value of 375 V.
The maximum voltage on the non-intrinsically safe circuits must not exceed 253 Vrms in the event of
a fault.
10 Mechanical data
The following mechanical data are valid for all housing and electronics versions.
Mechanical data
Protection (IEC/EN 60529)
Connection cross-section:
Overvoltage category
Pollution degree
11 Thermal data
Permissible ambient temperatures
Permissible ambient temperature at the installation lo-
cation of an instrument
as associated apparatus for installation in zone 2
12

Installation

The controllers VEGAMET 841, 842, 861, 862 as associated equipment for installation in zone 2/Div
8
In type of protection intrinsic safety Ex ia IIC, IIB/IIIC.
For connection to a certified, intrinsically safe circuit.
U ≤ 23.3 V DC
o
I ≤ 111.3 mA
o
P ≤ 648.4 mW
o
Characteristics: linear
C negligibly small
i
L negligibly small
i
The maximum values given in the table can be used as concentrat-
ed capacitances and concentrated inductances.
The values for IIC and IIB are also permissible for dust explosive
areas.
IIC
0.2 mH
o
120 nF
o
TYPE 4X, IP66/IP67
0.25 ... 2.5 mm
II
4
Ambient temperature (Ta)
-40 ... +50 °C (-40 ... +122 °F)
c-UL-us
IIB, IIIC
0.5 mH 0.5 mH
88 nF 580 nF
2
VEGAMET 841, 842, 861, 862
IIA
2 mH 10 mH
470 nF 760 nF