Electrical Data; Modbus Outputs And Digital Outputs; Special Connection Conditions - ABB SensyMaster FMT230 Commissioning Instruction

FMT230, FMT250 THERMAL MASS FLOWMETER | CI/FMT230/250-EN REV. B

Electrical data

Modbus outputs and digital outputs

Model: FMT2xx-F1..., FMT2xx-F2...
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) NI
(Div. 2, Zone 2)
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
XP
(Div. 1, Zone 1)
U [V] I [mA] U [V] I [mA]
M M O O
4,2 150
30 100 U [V] I [mA]
i i
4,2 150
30 100 30 25
30 100 30 25
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 19 must be observed when changing the type of
protection.
IS
(Div. 1, Zone 1)
P [mW] C [nF] C [nF]
O O O pa
150 13900 —
P [mW] C [nF] C pa [nF]
i i i
150 13900 —
187 20 —
187 20 —
M
15
L [µH]
O
20
L [µH]
i
20
200
200
= 30 V is