Endress+Hauser Liquiphant FTL62 - Supply Voltage, Terminals, and Cable Specs

Liquiphant FTL62 HART Electrical connection
Endress+Hauser 21
6.3.1 Supply voltage
• U = 10.5 to 35 V
DC
(Ex d, Ex e, non-Ex)
• U = 10.5 to 30 V
DC
(Ex i)
• Rated current: 4 to 20 mA HART
• The power unit must be tested to ensure it meets safety requirements (e.g. PELV,
SELV, Class 2).
• Comply with the following according to IEC/EN61010-1: provide a suitable circuit
breaker for the device.
6.3.2 Terminals
• Supply voltage and internal ground terminal: 0.5 to 2.5 mm
2
(20 to 14 AWG)
• External ground terminal: 0.5 to 4 mm
2
(20 to 12 AWG)
6.3.3 Cable specification
• The cable outer diameter depends on the cable entry used
• Cable outer diameter
• Plastic: ⌀5 to 10 mm (0.2 to 0.38 in)
• Nickel-plated brass: ⌀7 to 10.5 mm (0.28 to 0.41 in)
• Stainless steel: ⌀7 to 12 mm (0.28 to 0.47 in)
6.3.4 4-20 mA HART
2
3
4
Y
+ +
- -
I
1
mA
A0028908
 16 Block diagram of HART connection
1 Device with HART communication
2 HART communication resistor
3 Power supply
4 Multimeter or ammeter
The HART communication resistor of 250 Ω in the signal line is always necessary in
the case of a low-impedance power supply.
Take the voltage drop into consideration:
Maximum 6 V for a 250 Ω communication resistor
6.3.5 Overvoltage protection
Devices without optional overvoltage protection
Equipment from Endress+Hauser fulfills the requirements of the product standard
IEC/DIN EN 61326-1 (Table 2 Industrial Environment).
Depending on the type of port (DC supply, input/output port) different test levels
according to IEC/DIN EN 61326-1 against transient overvoltages (Surge) are applied
(IEC/DIN EN 61000-4-5): Test level on DC power ports and input/output ports is 1 000 V
line to earth