44
VA Master FAM540
METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E
… 7 Installation
… Electrical connections
Power supply / current output
Terminals 31 / 32 serve both as a connection for the power
supply and as a 4 to 20 mA current output for the transmitter.
The current output is also used for HART® communication.
Power supply
Terminals
31 / 32
Voltage
Standard: 10 to 46 V DC
Explosion-proof design: 10 to 30 V DC.
Residual ripple
maximum 5 % or. ± 1.5 Vss
Power consumption
< 1 W
Current output
Terminals
31 / 32
Output
4 to 20 mA, can be configured to 21 to 23 mA for an
alarm (in accordance with NAMUR NE43)
Load
Minimum > 250
Ω
, maximum 1500
Ω
(for I at alarm = 23.0 mA)
At zero-point:
≤
8 µ A/K
Power consumption
< 1 W
Figure 23: Current output load diagram
HART output
Model FAM54xE/Fx
Specifications
Terminals
31 / 32
Configuration
• Directly on the device
• Using DAT200 Asset Vision Basic software and
HART-DTM
Transmission
FSK modulation on current output 4 to 20 mA in
accordance with the Bell 202 standard
Baud rate
1200 baud
Display
Logic 1: 1200 Hz
Logic 0: 2200 Hz
Maximum signal
amplitude
1.2 mAss
Load (RB) at current
output
250 to 1500
Ω
See the separate interface description for detailed information.
System integration
In conjunction with the DTM (Device Type Manager) available for
the device, the corresponding framework applications in
accordance with FDT 0.98 or 1.2 (DAT200 Asset Vision Basic) can
be used for communication (configuration, parameterization).
Other tool or system integrations (e.g. Emerson AMS / Siemens
PCS7) upon request.
The necessary DTMs and other files can be downloaded from
www.abb.com/flow
.
Programmable binary output
Terminals 41 / 42 are used as a primary programmable binary
output. The pulse output, general alarm, min./max. alarm and
general alarm functions, as well as "no function" can be
configured using the software.
Binary output
Terminals
41 / 42
Output
• NAMUR contact (DIN 19234) or
• Standard optoelectronic coupler (UH =
16 to 30 V DC)
Switching behavior
As normally closed or normally open contacts
Internal resistance
With contact open > 10 k
Ω
Switching current
Maximum 15 mA
Output Voltage
Minimum Us 2 V DC
Pulse output
Terminals
41 / 42
Pulse width
5 to 256 ms, maximum 50 % of the period
Frequency fmax
Maximum 50 Hz
