Switching Amplifier; Analog Indicator With Transmitter - ABB VA Master FAM540 Commissioning Instructions

6.5.2

Switching amplifier

For analog indicators with alarm signaling units
(model FAM54xB/C/Dx)
Specifications
Power supply 230 V AC, +10 % / -15 %, 45 ... 60 Hz
115 V AC, +10 % / -15 %, 45 ... 60 Hz
24 V DC, +10 % / -15 %
Output 1 or 2 switching relays with potential-free
changeover contacts
Switching capacity Maximum 250 V, maximum 4 A,
maximum 500 VA
Maximum permissible Between switch amplifier and alarm signaling
cable length unit: 300 m (984 ft)
Permissible ambient -20 ... 60 °C (-4 ... 140 °F)
temperature
Electrical connection Screw terminals, maximum 2.5 mm
Type of assembly 35 mm top-hat rail in accordance with
EN 60715:2001
IP rating IP20 in accordance with EN 60529
Weight Approx. 150 g (0.3 lb)
6.5.3

Analog indicator with transmitter

Model FAM54xE/Fx
A
F
1
B
F
1
C
F
1
Fig. 20: Analog indicator with transmitter
A Central power supply B Power supply via power supply unit
C HART output 1 Flowmeter 2 Power supply
3 Power supply unit 4 HART modem
32 CI/FAM540-EN Rev. B | VA Master FAM540
2
(14 AWG)
U
U
B
S
31
2
32
R
B
42
41
3
U
U
B S
31
32
R
R
B
42
41
31
32
R R
B B
HART
42
4
41
G10418
Legend
U Operating voltage
B
U Input terminal voltage
S
R Maximum permissible load for power supply unit (e.g.
B
indicator)
R Maximum permissible load for output circuit; is determined by
power supply unit
Functional earth
Cables
Maximum cable length 1500 m, AWG 24 twisted and shielded.
Power supply / current output
Terminals 31 / 32 serve both as a connection for the power
supply and as a 4 ... 20 mA current output for the transmitter.
The current output is also used for HART communication.
Power supply
Terminals 31 / 32
Voltage Standard: 10 ... 46 V DC
Explosion-proof design: 10 ... 30 V DC.
Residual ripple Maximum 5 % or ± 1.5 V
Power consumption < 1 W
Current output
Terminals 31 / 32
Output 4 ... 20 mA, can be configured to 21 ... 23 mA for
an alarm (in accordance with NAMUR NE43)
Load Minimum > 250 Ω, maximum 1500 Ω
(for I at alarm = 23.0 mA)
Temperature effect ≤ 8 μ A/K
Power consumption < 1 W
R [k ] Ω
B
1,5
1
0,5
0,25
10 15,7
Fig. 21: Load diagram of the current output
ss
21,5 33 46 U [V]
B
G10420