Potential Matching; Cable Entries; Connecting Cable Cable Specifications; Electrical Connections - Endress+Hauser Proline Prosonic Flow 92F Series Safety Instructions

Proline Prosonic Flow 92F

Potential matching

Cable entries

Connecting cable cable
specifications

Electrical connections

Endress+Hauser
"
Caution!
• There must be potential matching along the circuits (inside and outside the hazardous area).
• The transmitter must be safely included in the potential matching system by means of the screw terminal
(c) on the outside of the transmitter housing or by means of the corresponding ground terminal in the
connection compartment (f).
• Alternatively, the sensor and the transmitter (compact version) or the connection housing of the sensor can
be included in the potential matching system by means of the pipeline if a ground connection, performed
as per the specifications, is ensured.
Thread for cable entry M20x1.5 or ½"-NPT or G ½", as required.
The sensor cable connection between the sensor and the transmitter has EEx ia explosion protection.
The maximum capacitance per unit length of the cable connection is 1μF/km.
The maximum inductance of the cable is 1 mH/km.
The cable supplied by Endress+Hauser (max. 30 m) complies with these values.
Terminal/electronics compartment cover (terminal assignment, see tables below)
4 to 20 mA HART
(connection with a cable)
f
g
+ – + –
1 2 3 4
e
Fig. 3
A0004027
PROFIBUS PA
f
g
–
+
1 2
e
Fig. 6
A0004030
e Service connector (see also Page 19)
f HART ground terminal: if the potential matching is routed via the cable and if two cables are used, both cables
must be connected to the potential matching system if a connection is not already established externally.
PROFIBUS PA and FOUNDATION Fieldbus: between the stripped fieldbus cable and the ground terminal,
the cable shielding must not exceed 5 mm in length
g HART (Fig. 3): cable for supply voltage and/or pulse output
HART (Fig. 4): cable for supply voltage
PFM (Fig. 5): Optional pulse/frequency output, can also be operated as a status output
(not for PROFIBUS PA and FOUNDATION Fieldbus
PROFIBUS PA (Fig. 6): cable of input and output circuits
FOUNDATION Fieldbus (Fig. 7): cable of input and output circuits
!
Note!
PFM output (pulse/frequency modulation): connection as illustrated in Fig. 5
(only together with flow computer RMC or RMS 621).
4 to 20 mA HART
(connection with two cables)
f
g
h
+ – + –
1 2 3 4
e
Fig. 4
A0004028
FOUNDATION Fieldbus
f
g
–
+
1 2
e
Fig. 7
A0004030
0
ATEX II3G
4 to 20 mA HART
(PFM connection)
f
g
+ – + –
1 2 3 4
e
Fig. 5
A0004029
17