FMT230, FMT250
THERMAL MASS FLOWMETER | CI/FMT230/250-EN REV. B
41
Position of the terminals
1
Terminal cover power supply
2
Fuse
3
Terminals for power supply
4
Terminals for Modbus®
5
Terminals for digital outputs
6
Local operating interface
7
Clamp for shielding and strain relief
8
Internal ground terminal (shielding)
9
External ground terminal (potential equalization / functional ground)
Figure 28: Terminals on the device
Pin assignment
Figure 29: Electrical connection PA = functional ground (potential equalization)
Connections for the power supply
DC voltage
Terminal
Function / comments
1+
+
2
−
−
Connections for the outputs
Terminal
Function / comments
A / B
Modbus® RTU (RS485)
41 / 42
Passive digital output DO1
The output can be configured as a pulse output, frequency
output or switch output.
51 / 52
Passive digital output DO2
The output can be configured as a pulse output or switch
output.
Electrical data for inputs and outputs
Note
When using the device in potentially explosive atmospheres,
observe the additional connection data in page 6 and page 12!
Power supply
Supply voltage
24 V DC ± 20 %
(ripple: ≤
5 %)
Power consumption
P
≤
10 W
