Flowmeter Sensor In Div. 1 And Transmitter In Div. 2 Or Outside The Hazardous Area - ABB FEX300 Original Instruction

Ex relevant specifications for operation in Div. 1
5.1.2

Flowmeter sensor in Div. 1 and transmitter in Div. 2 or outside the hazardous area

FEP325 / FEP525 flowmeter sensor
(Div. 1)
A
1+ 2-
L
A = Transmitter, B = Sensor
Fig. 14: HART, PROFIBUS PA and FOUNDATION fieldbus protocol
Change from one to two columns
Power supply connections
AC power supply
Terminal Function / Notes
L
Live / Phase
N
Neutral
PE /
Protective earth (PE)
DC power supply
Terminal Function / Notes
1+
+
2-
-
PE /
Protective earth (PE)
Sensor cable terminal connections
Only on remote mount design.
Terminal Function / Notes
M1
Magnet coil
M2
Magnet coil
D1
Data line
D2
Data line
/ SE Shield
Signal line
E1
Schield for E1
1S
E2 Signal line
Schield for E2
2S
Measurement potential
3
Change from one to two columns
22 - EN
FET325 / FET525 transmitter
PA
HART
24 V
- -
+ + +
31 32 51 52 81 82 41 42
PROFIBUS PA, FOUNDATION fieldbus
FF+ FF-
PA+ PA-
N
97 98
PE
Wire color
Brown
Red
Orange
Yellow
-
Violet
-
Blue
-
Green
(Div. 2)
PA PA
- -
+
M1 M2 D1 D2 3 2S E2 E1 1S
-
+
41 42
B
M1 M2 D1 D2 3
Output connections
Terminal Function / Notes
31 / 32
Current / HART output
The current output is available in "active" or "passive"
mode.
97 / 98
Digital communication
PROFIBUS PA (PA+ / PA-) or FOUNDATION
fieldbus (FF+ / FF-) in acc. with IEC 61158-2.
51 / 52
Digital output DO1 active / passive
Function can be configured locally as „Pulse Output"
or „Digital Output". Factory setting is „Pulse Output".
81 / 82
Digital input / contact input
Function can be configured locally as „External
output switch-off", „external totalizer reset", „external
totalizer stop" or „other".
41 / 42 Digital output DO2 passive
Function can be configured locally as „Pulse Output"
or „Digital Output". Factory setting is „Digital Output",
flow direction signaling.
Potential Equalization (PA)
PA
Functional ground
(only with transmitter outside the hazardous area)
Note
The housing for the transmitter and flowmeter sensor must be
connected to the potential equalization PA. The operator must ensure
that when connecting the protective conductor (PE) no potential
differences can occur between protective conductor and potential
equalization (PA).
FM-compliant installations must be performed in accordance with
"Installation of Intrinsically Safe Systems for Hazardous (Classified)
Locations" (ANSI/ISA RP 12.6)
(ANSI/NFPA 70 Sections 504 and 505).
For devices with remote mount design for use in FM / cFM Div. 1 or
FM / cFM Div. 2 the signal cable between the flowmeter sensor and
the transmitter must have a minimum length of 5 m (16.4 ft).
A temperature of 70 °C (158 °F) at the cable entry is assumed for the
Ex calculations. Therefore, the cables used for the supply power and
the signal inputs and outputs must have a minimum specification of
70 °C (158 °F).
FEX300, FEX500
FET321 / FET521 transmitter outside
the hazardous area
PA /
E2 E1
PA
and "National Electric Code®"
SM/FEX300/FEX500/FM/CSA-EN
G01328-01