FM Installation Drawing 6331QF01
LERBAKKEN 10, 8410 RØNDE DENMARK. WWW.PRELECTRONICS.COM
Revision date:
2014-09-16
Version Revision
V1R0
Page:
1/2
Installation notes.
For installation in Class I the Transmitter must be installed in a suitable enclosure to meet installation
codes stipulated in The National Electrical Code (ANSI-NFPA 70).
Equipment that is FM-approved for intrinsic safety may be connected to barriers based on
the Entity Concept. This concept permits interconnection of approved transmitters, meters
and other devices in combinations, which have not been specifically examined by FM,
provided that the agency's criteria are met. The combination is then intrinsically safe, if the
entity concept is acceptable to the authority having jurisdiction over the installation.
The entity concept criteria are as follows: The intrinsically safe devices, other than barriers,
must not be a source of power. The maximum voltage Ui(V
MAX
) and current Ii(I
MAX
), and
maximum power Pi(Pmax), which the device can receive and remain intrinsically safe, must
be equal to or greater than the voltage (Uo or V
OC
or V
t
) and current (Io or I
SC
or I
t
) and the
power Po which can be delivered by the barrier. The sum of the maximum unprotected
capacitance (C
i
) for each intrinsically device and the interconnecting wiring must be less than
the capacitance (C
a
) which can be safely connected to the barrier. The sum of the maximum
unprotected inductance (L
i
) for each intrinsically device and the interconnecting wiring must
be less than the inductance (L
a
) which can be safely connected to the barrier. The entity
parameters Uo, V
OC
or V
t
and Io, I
SC
or I
t
, and C
a
and L
a
for barriers are provided by the
barrier manufacturer.
Non Hazardous Location
Hazardous (Classified ) Location
Class I, Division 1, Group A,B,C,D T4..T6
Class I, Zone 0, AEx ia IIC T4..T6
Terminal:
11,12,13 and
21,22,23
Ui: 30 VDC
Ii: 120 mA
Pi: 0.84 W
Li: 10μH
Ci: 1.0nF
T6: -40 ≤ Ta ≤ 60ºC
T4: -40 ≤ Ta ≤ 85ºC
13
12
44
43
42
41
+
-
Barrier
23
22
54
53
52
51
+
-
Barrier
6331B2A : one channel
6331B2B : two channel
CH2
CH1
11
21
FM Installation Drawing - 6331B
20 6331V106-DE
