Electrical Data; Modbus Outputs And Digital Outputs; Special Connection Conditions - ABB SensyMaster FMT230 Commissioning Instruction
Thermal mass flowmeter
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Also See for SensyMaster FMT230:
- Commissioning instruction (28 pages) ,
- Operating instruction (112 pages)
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FMT230, FMT250 THERMAL MASS FLOWMETER | CI/FMT230/250-EN REV. B
... 2 Use in potentially explosive atmospheres in accordance with ATEX and IECEx
Electrical data
Modbus outputs and digital outputs
Model: FMT2xx-A1..., FMT2xx-A2..., FMT2xx-A3...
Outputs
Modbus, active
Terminals A / B
Digital output DO1, passive
Terminals 41 / 42
Digital output DO2, passive
Terminals 51 / 52
All outputs are electrically isolated from each other and from the power supply.
Digital outputs DO1 / DO2 are not electrically isolated from each other. Terminals 42 / 52 have the same potential.
Special connection conditions
Note
If the protective earth (PE) is connected in the flowmeter's
terminal box, you must ensure that no dangerous potential
difference can arise between the protective earth (PE) and the
potential equalization (PA) in areas with explosion risk.
Operating values
(general)
'Ex ec'
(Zone 2, 22)
U
[V]
I
[mA]
U
[V] I
[mA]
N
N
N
N
30
30
30
30
30
30
30
30
30
30
30
30
Type of protection
'Ex e'
(Zone 1, 21)
U
[V] I
[mA]
U
[V]
I
M
M
O
4,2
30
100
U
[V]
i
4,2
30
100
30
30
100
30
The output circuits are designed so that they can be connected
to both intrinsically-safe and non-intrinsically-safe circuits.
•
Combining intrinsically safe and non-intrinsically safe circuits
is not permitted.
•
On intrinsically safe circuits, potential equalization should be
established along the entire length of the cable used for the
signal outputs.
•
The rated voltage of the non-intrinsically safe circuits is
U
= 30 V.
M
•
Intrinsic safety is preserved If the rated voltage U
not up-scaled when connections are established to non-
intrinsically safe external circuits.
•
The information in Changing the type of protection on
page 11 must be observed when changing the type of
protection.
'Ex ia'
(Zone 1, 21)
[mA]
P
[mW]
C
[nF]
C
O
O
O
150
150
13900
I
[mA]
P
[mW]
C
[nF]
C
i
i
i
150
150
13900
25
187
20
25
187
20
[nF]
L
[µH]
O pa
O
—
20
pa [nF]
L
[µH]
i
i
—
20
—
200
—
200
= 30 V is
M
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