16
5 Supplement
LFR • Two-wire 4 … 20 mA/HART
62270-EN-191108
5 Supplement
5.1 Technical data
Note for approved instruments
The technical data in the respective safety instructions which are included in delivery are valid for
approved instruments (e.g. with Ex approval). These data can differ from the data listed herein, for
example regarding the process conditions or the voltage supply.
All approval documents can be downloaded from our homepage.
Electromechanical data - version IP66/IP67 and IP66/IP68 (0.2 bar)
Options of the cable entry
Ʋ
Cable entry
M20 x 1.5; ½ NPT
Ʋ
Cable gland
M20 x 1.5; ½ NPT (cable ø see below table)
Ʋ
Blind plug
M20 x 1.5; ½ NPT
Ʋ
Closing cap
½ NPT
Material ca-
ble gland
Material seal
insert
Cable diameter
4.5 … 8.5 mm
5 … 9 mm
6 … 12 mm
7 … 12 mm
10 … 14 mm
PA
NBR
–
●
●
–
●
Brass, nickel-
plated
NBR
●
●
●
–
–
Stainless
steel
NBR
–
●
●
–
●
Wire cross-section (spring-loaded terminals)
Ʋ
Massive wire, stranded wire
0.2 … 2.5 mm² (AWG 24 … 14)
Ʋ
Stranded wire with end sleeve
0.2 … 1.5 mm² (AWG 24 … 16)
Voltage supply
Operating voltage U
B
12 … 35 V DC
Operating voltage U
B
with lighting
switched on
18 … 35 V DC
Reverse voltage protection
Integrated
Permissible residual ripple
Ʋ
for 12 V < U
B
< 18 V
≤ 0.7 V
eff
(16 … 400 Hz)
Ʋ
for 18 V < U
B
< 35 V
≤ 1 V
eff
(16 … 400 Hz)
Load resistor
Ʋ
Calculation
(U
B
- U
min
)/0.022 A
Ʋ Example - U
B
= 24 V DC
(24 V - 12 V)/0.022 A = 545 Ω
