Endress+Hauser promag 31, Operating Manual

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3.4 Wiring diagrams
Electrical connection: supply, inputs and outputs
*After the first operation or in case of an interruption of the power supply the fiscal
meter measuring system Promag 31 signals an alarm. With connection through an
external reset switch according wiring version 1/2 the alarm can be canceled.
Wiring version 1
Is to chosen if the 24-V power supply is near to the Promag display. The alarm
instrument is to be made available from the customer. The switch for the error reset
respectively for the display test can be ordered through Hauser. If this
version is not available we refer to wiring version 2.
+
-
+
-
+
-
+
-
Earth terminal (ground wire)
L1
}
for AC
L+
}
for DC supply
N L-
Pulse/frequency output
(passive)
Status output (passive)
Auxiliary input
Current output (active)
Earth terminal (screen of signal cable)
f
max
= 400 Hz
max. 30 V/250 mA
max. 30 V/250 mA
⇒
System/process fault indication
⇒
Flow direction
3...30 V DC, R
i
= 1.8 k
Ω
•
self test function of the display for a duration of 10 s
•
external reset in case of errors *
0/4...20 mA
R
L
< 700
Ω
Fuse
Supply cable
Earth terminal for
ground wire
Earth terminal for
cable screen
Signal cable
b
a028
y
3
0
Fig. 31
Promag 31 24 V power supply
b
a
0
28y
70
Reset/
Test
Alarm
24 V DC
+
–
Status
Aux IN
Fig. 32
Promag 31 3. Electrical Connection
Hauser 25