Electrical Connection
Wiring Analogue and Smart
Electronics
The two-wire cable is connected to
screw terminals on the electronic insert.
•
Supply voltage: 11.5…45 V DC;
additional for Smart electronics
Ex ia: 11.5…30 V DC
•
Cable:
−
Analogue: two-wire instrumentation
cable
−
Smart: screened, twisted-pairs
−
max. wire cross-section: 2.5 mm
2
(solid conductor)
•
Internal protection circuits against
reverse polarity, HF interference and
overvoltage peaks.
•
Test signal:
The output current can be measured
using the terminal plugs for this
purpose on the electronic insert
without interrupting the process
measurement.
•
Always connect the screening or
ground cable (if present) to the
internal ground terminal of the
housing, not to terminal 3.
1 2
+
+
–
–
3
Display
Zero
Span
fine
1
2
3
τ
coarse
1 2
+ –
3
Test 4…20 mA
T 50 mA
*
Electrical connection analogue electronics
internal ground terminal
*
For analogue
electronics versions with
certificate ATEX II 1/3 D
(non Ex supply voltage)
the instrument must
always be protected by a
50 mA (slow-blow) fuse.
U/V
R/
Ω
0
1522
1000
840
500
11.5
30
45
20
Standard
EEx ia IIC T6
Load diagram for
analogue and Smart
electronics
1 2
+ –
3
1
2
+
+
–
–
3
Zero
Damping
on
off
Span
Display
Test 4…20 mA
Electrical connection Smart electronics
internal ground terminal
13
Summary of Contents for cerabar M PMP 46
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