VA Master FAM540
METAL CONE VARIABLE AREA FLOWMETER | OI/FAM540-EN REV. E
43
Switching amplifier
Specifications
Power supply
230 V AC, +10 % /
−
15 %, 45 to 60 Hz
115 V AC, +10 % /
−
15 %, 45 to 60 Hz
24 V DC, +10 % /
−
15 %
Output
One or two switching relays with potential-free
changeover contacts
Switching capacity
Maximum 250 V, maximum 4 A, maximum 500 VA
Maximum permissible
cable length
Between the switching amplifier and alarm
signalling unit:
300 m (984 ft)
Permissible ambient
temperature range
−
20 to 60 °C (
−
4 to 140 °F)
Electrical connection
Screw terminals, maximum 2.5 mm
2
(14 AWG)
Type of assembly
35 mm top-hat rail in accordance with
EN 60715:2001
IP rating
IP 20 in accordance with EN 60529
Weight
approx. 150 g (0.3 lb)
Analog indicator with transmitter
Model FAM54xE/Fx
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
Figure 22: Analog indicator with transmitter
Legend
UB Operating
voltage
US Input
terminal
voltage
RB
Maximum permissible load for power supply unit (e.g. indicator)
R
Maximum permissible load for output circuit; is determined by
power supply unit
Functional
earth
Cable
Maximum cable length 1500 m, AWG 24 twisted and shielded.
