ABB SensyMaster FMT430 Operating Instructions Manual page 58

58 SensyMaster FMT430, FMT450 THERMAL MASS FLOWMETER | OI/FMT430/450-EN REV. B
... 7 Electrical connections
... Electrical data for inputs and outputs
Current output Uco / 32 as loop power supply for digital output 41 / 42 or 51 / 52
A Transmitter FCx400
B Customer wiring
Figure 44: Current output Uco / 32 in power mode
OC1 Modbus / PROFIBUS DP plug-in
card
R Load resistance
B
In the case of digital communication via Modbus / PROFIBUS DP,
the current output Uco / 32 can be switched to the 'Power Mode'
operating mode through the software.
The current output 31/32/Uco is set permanently to 22.6 mA and
no longer follows the selected process variable. HART
communication is deactivated.
As a result, the passive digital outputs 41 / 42 or 51 / 52 can also
be operated as active digital outputs.
The load resistance R needs to be integrated by the customer
B
outside of the transmitter housing.
Loop power supply 24 V DC pperating mode
Terminals
Function
Output Voltage
Load rating I
max
Table 2: Specification current output Uco / 32 in power mode
Figure 45: Output voltage dependent on load resistance
Uco / 32
For active connection of passive outputs
Load dependent, see Figure 44.
22.6 mA, permanently short circuit-proof