DR22
X
0 Radar Level Instrument
4
WARNING!
When using the PTFE Wave-Stick in hazardous areas of Zone 0, any electrostatic charging
of the stick, e.g. by flow of product, must be avoided!
3 Electrical connection
To open the signal converter, please use a screwdriver and release the four visible screws
on top of the blue housing.
Terminal assignment
DR22X0:
Rated temperature
of connecting cables: see Section 6.
Supply voltage at the terminals (1,2)
The 4-20 mA supply must be able to provide the following voltage U at the terminals of the
DR22X0 – dependent on the current I. Please consider also the line resistance and pos-
sible loads on the secondary side of the supply unit.
The allowed upper limit R for load+line resistance is depending on the specification of the
supply unit:
U @20mA
(supply unit) 14 V
15 V
16 V
17 V
18 V
Max. resistance R
50
Ω
100
Ω
150
Ω
200
Ω
250
Ω
Screwed Cable Gland
Intrinsically Safe Supply
U=17 to 30 Vdc
Any polarity possible
4mA 8 mA 12mA 16mA 20mA
17V
13V
14V
15V
16V
U
3.6 mA
22 mA
I