Digital Communication - ABB VA Master FAM540 Instrucciones Para La Puesta En Funcionamiento

Error message on the LCD display
Automatic system monitoring with error diagnostics in plain text on
the LCD display.
Data security
Automatic saving of the totalizer values and application conditions
using EEPROM at shutdown or when supply voltage fails (over 10
years).
Terminal connection diagram
a) Auxiliary power from central power supply
2
Functional ground
Fig. 12
b) Auxiliary power from power supply
2
Functional ground
Fig. 13
1 Power supply
2 FAM540
U = Operating voltage
B
U = Supply voltage
S
R = Max. allowable load for power supply (e.g., indicator)
B
R = Max. allowable load for output circuit is determined
by the power supply
Auxiliary power (supply voltage)
Standard: 10 ... 46 V DC
Ex design: 10 ... 30 V DC (see chapter Explosion-protection
relevant)
Residual ripple: max. 5% or ±1.5 V
R [k ] Ω
B
1.5
1
0.5
0.25
10 V 15.7 V
Fig. 14: Current output load diagram
CI/FAM540-X1
U U
B
S
31
32
R
B
42
41
U
U
B S
31
32
R
B
1
42
41
ss
U [V]
21.5 V 33 V 46 V
B
G00420
VA Master FAM540
Current output load
Min. > 250 Ω, max. 1500 Ω (with I on alarm = 23.0 mA)
Max. cable length 1500 m, AWG 24 twisted and shielded
Power
< 1 W
Temperature influence on current output
≤ 8 µ A/K
For Ex design, see chapter Explosion-protection relevant.
Ko
3.4.3

Digital communication

Communication HART protocol
The HART® protocol is used for digital communication between a
process control system or PC, a handheld terminal and the FAM540.
G00418
All meter and measuring point parameters can be transmitted. In
reverse direction, the integrated converter can also be configured in
this manner.
The digital communication utilizes an AC signal superimposed on the
analog current output (4-20 mA) that does not affect any meters
connected to the output. To operate and configure the meter, the
program DSV401 (SMART VISION) can be used.
DSV401 (SMART VISION) is a universal communication software for
intelligent field devices that uses a variety of communication methods
R
to enable full data transfer to a complete range of field devices. The
main applications
diagnostics, recording and data management for all intelligent field
devices.
HART communication is performed via FSK modem with point-to-
G00419
point or multidrop operation.
Transmission method
FSK modulation at current output of 4 ... 20 mA based on the Bell
202 standard. Max. signal amplitude 1.2 mA
Functional ground
Fig. 15
1 Bell 202 modem
R Min. = 250 Ω, max. = 1500 Ω
B
Functional ground
Fig. 16
include parameter display,
.
SS
Current output terminals
Hart R Hart ≥ 250 Ω
(supply voltage)
Switching output terminals
(Prog. output)
Installation
configuration,
EN - 13