Endress+Hauser Proline Promag 55S Specifications

TI00071D/06/EN/14.17
71385973

Products Solutions Services

Technical Information

Proline Promag 55S

Electromagnetic flowmeter

The flowmeter with outstanding abrasion resistance and integrated solids
content diagnostics

Application

• The bidirectional measuring principle is virtually independent
of pressure, density, temperature and viscosity

• Ideal for the most demanding applications with high solids
content and high abrasion

Device properties

• Intensified coil system

• Large range of liners

• Solids content up to 80% by weight

• 4-line backlit display with touch control

• Two switch outputs

• HART, PROFIBUS PA/DP, FOUNDATION Fieldbus

Your benefits

• Superb signal stability due to unique signal processing

• Maximum safety – industry-optimized measuring electrodes
and linings

• Energy-saving flow measurement – no pressure loss due to
cross-section constriction

• Maintenance-free – no moving parts

• Highest performance – with integrated solids measurement
for demanding fluids

• Highest safety – integrated electrode cleaning

• Automatic recovery of data for servicing

Table of contents

Proline Promag 55S

Function and system design . . . . . . . . . . . . . . . . . . . . . .3

Measuring principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Measuring system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Measured variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Measuring ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Operable flow range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Input signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Low flow cut off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Galvanic isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Switching output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Terminal assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Power supply failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Electrical connection, remote version . . . . . . . . . . . . . . . . . . . . . 8

Potential equalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Cable entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Remote version cable

specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Pressure tightness (lining) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Limiting flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Pressure loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Vibrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Mechanical construction . . . . . . . . . . . . . . . . . . . . . . . 27

Design, dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Measuring tube

specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Fitted electrodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Process connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Surface roughness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Operability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Local operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Language groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Remote operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Certificates and approvals . . . . . . . . . . . . . . . . . . . . . . 44

CE mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

C-tick symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Ex approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Sanitary compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Pressure equipment directive . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

FOUNDATION Fieldbus certification . . . . . . . . . . . . . . . . . . . . . 44

PROFIBUS DP/PA certification . . . . . . . . . . . . . . . . . . . . . . . . . 44

Other standards and guidelines . . . . . . . . . . . . . . . . . . . . . . . . . 44

Performance characteristics . . . . . . . . . . . . . . . . . . . . 13

Reference operating

conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Maximum measured error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Repeatability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Mounting location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Inlet and outlet runs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Adapters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Length of connecting cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Foundations, supports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Ambient temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Degree of protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Shock and vibration resistance . . . . . . . . . . . . . . . . . . . . . . . . . 19

Electromagnetic compatibility (EMC) . . . . . . . . . . . . . . . . . . . . 19

Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Medium temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Conductivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Pressure-temperature ratings . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Medium pressure range (nominal pressure) . . . . . . . . . . . . . . 23

Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Registered trademarks . . . . . . . . . . . . . . . . . . . . . . . . . 45

2 Endress+Hauser

Proline Promag 55S

Ue

I

I

B

L

V

r

C

r

S

1

2

r

M

m

V

Function and system design

Measuring principle Faraday’s law of induction states that a voltage is induced in a conductor moving in a magnetic field.

In electromagnetic measuring, the flowing medium corresponds to the moving conductor. The induced
voltage is proportional to the flow velocity and is detected by two measuring electrodes and
transmitted to the amplifier. Flow volume is computed on the basis of the pipe’s diameter. The
constant magnetic field is generated by a switched direct current of alternating polarity.

A0003191

Ue = B · L · v
Q = A · v

Ue induced voltage
B magnetic induction (magnetic field)
Lelectrode gap
v flow velocity
Q volume flow
A pipe cross-section
I current strength

Measuring system The flow measuring system consists of the following components:

• Promag 55 transmitter

• Promag S sensor (DN 15 to 600 / ½ to 24")

Two versions are available:

• Compact version: Transmitter and sensor form a single mechanical unit.

• Remote version: Transmitter and sensor are installed separately.

Measurement of solids flow rates

In combination with a density meter, e.g. with "Gammapilot M" from Endress+Hauser, Promag 55S also
determines the throughput of solids in mass, volume or percentage rates.
The following order specifications are required for this: order option for software function "Solids
content flow" (F-CHIP) and order option for a current input.

A0006118

Solids content flow measurement (m) with the aid of a density and flow measuring device. If the solid density (ρS) and the density of
the carrier liquid (ρ

1 Flow measuring device (Promag 55S) → volume flow (V). The solid density (ρ

must be entered in the transmitter.

2 Density measuring device (e.g. "Gammapilot M") → total fluid density (ρ

) are also known, they can be used to calculate the solids flow.

C

) and the density of the transport liquid (ρC)

S

) (transport liquid and solids)

M

Endress+Hauser 3

Proline Promag 55S

Input

Measured variable • Flow rate (proportional to induced voltage)

• Conductivity (without temperature compensation)

Measuring ranges • Flow rate: Typical v = 0.01 to 10 m/s (0.03 to 33 ft/s) with the specified measuring accuracy

• Conductivity s = 5 to 2000 μS/cm
not for sensors without reference electrode (Promag S with brush electrodes)

Operable flow range Over 1000 : 1

Input signal Status input (auxiliary input)

U = 3 to 30 V DC, Ri = 5 kΩ,
Configurable for: totalizer(s) reset, positive zero return, error-message reset

Status input (auxiliary input) with PROFIBUS DP

U = 3 to 30 V DC, R

= 3 kΩ, galvanically isolated.

i

Switch level: ±3…±30 V DC, independent of polarity.
Configurable for: positive zero return, error message reset, zero point adjustment start

galvanically isolated

Current input

Active/passive selectable, galvanically isolated, full scale value adjustable, resolution: 3 μA,
temperature coefficient: typically 0.005% o.f.s./°C (0.003% o.f.s./°F)

• Active: 4 to 20 mA, R

• Passive: 0/4 to 20 mA, Ri ≤ 150 Ω, U

Output

Output signal Current output

Active/passive selectable, galvanically isolated, time constant selectable (0.01 to 100 s),
full scale value adjustable, temperature coefficient: typically 0.005% o.f.s./°C (0.003 % o.f.s./°F),
resolution: 0.5 μA

• Active: 0/4 to 20 mA, RL < 700 Ω (for HART: RL ≥ 250 Ω)

• Passive: 4 to 20 mA; supply voltage VS: 18 to 30 V DC; Ri ≥ 150 Ω

Pulse/frequency output

Active/passive selectable (Ex i version passive only), galvanically isolated

• Active: 24 V DC, 25 mA (max. 250 mA over 20 ms), RL > 100 Ω

• Passive: open collector, 30 V DC, 250 mA

• Frequency output: end frequency 2 to 10000 Hz (f
pulse width max. 10 s

• Pulse output: pulse value and pulse polarity selectable, pulse width configurable (0.05 to 2000 ms)

≤ 150 Ω, U

i

= 24 V DC, short-circuit proof

out

= 30 V DC

max

= 12500 Hz), on/off ratio 1:1,

max

PROFIBUS DP interface

• Transmission technology (Physical Layer): RS485 according to ASME/TIA/EIA-485-A: 1998,
galvanically isolated

• Profile Version 3.0

• Data transmission rate: 9.6 kBaud to 12 MBaud

• Automatic identification of data transmission rate

• Function blocks: 2 × analog input, 3 × totalizer

• Output data: volume flow, calculated mass flow, totalizer 1 to 3

• Input data: positive zero return (ON/OFF), totalizer control, value for local display

• Cyclic data transmission compatible with previous model Promag 35S

• Bus address adjustable via miniature switches or local display (optional) at the measuring device

• Available output combination →  6

4 Endress+Hauser

Proline Promag 55S

PROFIBUS PA interface

• Transmission technology (Physical Layer): IEC 61158-2 (MBP), galvanically isolated

• Profile version 3.0

• Current consumption: 11 mA

• Permissible supply voltage: 9 to 32 V

• Bus connection with integrated reverse polarity protection

• Error current FDE (Fault Disconnection Electronic): 0 mA

• Function blocks: 2 × analog input, 3 × totalizer

• Output data: volume flow, calculated mass flow, totalizer 1 to 3

• Input data: positive zero return (ON/OFF), totalizer control, value for local display

• Cyclic data transmission compatible with previous model Promag 35S

• Bus address adjustable via miniature switches or local display (optional) at the measuring device

FOUNDATION Fieldbus interface

• FOUNDATION Fieldbus H1

• Transmission technology (Physical Layer): IEC 61158-2 (MBP), galvanically isolated

•ITK version 5.01

• Current consumption: 12 mA

•Inrush current: < 12 mA

• Error current FDE (Fault Disconnection Electronic): 0 mA

• Permissible supply voltage: 9 to 32 V

• Bus connection with integrated reverse polarity protection

•Function blocks:
– 5 × Analog Input (execution time: 18 ms each)
– 1 × PID (25 ms)
– 1 × Digital Output (18 ms)
– 1 × Signal Characterizer (20 ms)
– 1 × Input Selector (20 ms)
– 1 × Arithmetic (20 ms)
–1 × Integrator (18 ms)

•Total VCRs: 48

• Total link objects in VFD: 40

• Output data: volume flow, calculated mass flow, temperature, totalizer 1 to 3

• Input data: positive zero return (ON/OFF), reset totalizer

• Link Master (LM) functionality is supported

Signal on alarm Current output

Failsafe mode selectable (e.g. according to NAMUR recommendation NE 43)

Pulse/frequency output

Failsafe mode selectable

Relay output

"de-energized" in the event of a fault or power supply failure

PROFIBUS DP/PA

Status and alarm messages in accordance with PROFIBUS Profile Version 3.0

Load See "output signal"

Low flow cut off Switch points for low flow freely selectable.

Galvanic isolation All circuits for inputs, outputs, and power supply are galvanically isolated from each other.

Switching output Relay output

Normally closed (NC or break) or normally open (NO or make) contacts available
(default: relay 1 = NO, relay 2 = NC),
max. 30 V / 0.5 A AC; 60 V / 0.1 A DC, galvanically isolated. Configurable for: error messages, empty
pipe detection (EPD), direction of flow, limit values.

Endress+Hauser 5

Power supply

Proline Promag 55S

Terminal assignment

Order code for
"Input / Output"

Fixed communication boards (fixed assignment)

A – – Frequency output

B Relay output 2 Relay output 1 Frequency output

H–––

J––

K–––

Flexible communication boards

C Relay output 2 Relay output 1 Frequency output

D Status input Relay output Frequency output

L Status input Relay output 2 Relay output 1

M Status input Frequency output 2 Frequency output 1

P Current output Frequency output Status input

20 (+) / 21 (–) 22 (+) / 23 (–) 24 (+) / 25 (–) 26 (+) / 27 (–)

Terminal No.

termination)

+5V (ext.

Current output

HART

Current output

HART

PROFIBUS PA

PROFIBUS DP

FOUNDATION

Fieldbus

Current output

HART

Current output

HART

Current output

HART

Current output

HART

PROFIBUS DP

V Relay output 2 Relay output 1 Status input

2 Relay output Current output 2 Frequency output

3

4 Current input Relay output Frequency output Current output

5 Status input Current input Frequency output Current output

Current input

Current output 2 Frequency output

Supply voltage 20 to 260 V AC, 45 to 65 Hz

20 to 64 V DC

Power consumption AC: < 45 VA at 260 V AC; < 32 VA at 110 V AC (incl. sensor)

DC: < 19 W (including sensor)

Switch-on current:

• Max. 2.5 A (< 200 ms) at 24 V DC

• Max. 2.5 A (< 5 ms) at 110 V AC

• Max. 5.5 A (< 5 ms) at 260 V AC

Power supply failure Lasting min. 1 power cycle:

• EEPROM or HistoROM/T-DAT saves measuring system data if power supply fails

• HistoROM/S-DAT: exchangeable data storage device which stores sensor characteristic data
(nominal diameter, serial number, calibration factor, zero point etc.)

PROFIBUS DP

Current output 1

HART

Current output 1

HART

HART

HART

6 Endress+Hauser

Proline Promag 55S

HART

PROFIBUS DP**

27

25

23

21

2

1

26

24

22

20

L1 (L+)

N (L-)

–

–

–

+

+

+

PROFIBUS PA*

FOUNDATION Fieldbus*

PA(–)/FF(–)

27

25

23

21

2
1

26

24

22

20

L1 (L+)

N (L-)

–

–

–

+

+

+

A (RxD/TxD-N)

B (RxD/TxD-P)

PA(+)/FF(+)

d

c

e

b

–27

–25

–23

–21

+ 26

+ 24

+ 22

+ 20

N (L-) 2
L1 (L+)1

25

23

21

2
1

24

22

20

L1 (L+)

N (L-)

–

–

–

+

+

+

27
26

A (RxD/TxD-N)

B (RxD/TxD-P)

a

A

d

b

g

d

c

e

b

d

c

e

b

g

d

c

e

b

g

PROFIBUS DP*

f f

f f

a

B

(d)

b

d/(g)

Electrical connection

Connecting the transmitter, cable cross-section max. 2.5 mm2 (14 AWG)

A View A (field housing)
B View B (wall-mount housing)

*) Fixed communication boards
**) Flexible communication boards
a Connection compartment cover
b Cable for power supply: 20 to 260 V AC / 20 to 64 V DC

c Ground terminal for protective conductor
d Electrode cable: see Terminal assignment →  6

e Ground terminal for electrode cable shield / Fieldbus cable
f Service adapter for connecting service interface FXA193 (Fieldcheck, FieldCare)
g Electrode cable: see Terminal assignment →  6

- Terminal No. 1: L1 for AC, L+ for DC

- Terminal No. 2: N for AC, L– for DC

Fieldbus cable:

- Terminal No. 26: DP (B) / PA (+) / FF (+): with polarity protection

- Terminal No. 27: DP (A) / PA (–) / FF (–): with polarity protection

Cable for external termination (only for PROFIBUS DP with permanent assignment communication board):

- Terminal No. 24: +5 V

- Terminal No. 25: DGND

A0015195

Endress+Hauser 7

Electrical connection,

E1

E2

GND

E

S1

E1

E2

S2

GND

E

S

5

7

4

37

42 41

42 41

6

5

7

8

4

37 36

n.c. n.c.

dc

c

d

a

b

n.c.

remote version

Connecting the remote version

a Connection compartment, wall-mount housing
b Cover of connection housing, sensor
c Electrode cable
d Coil current cable
n.c. unconnected, insulated cable shields
Terminal no. and cable colors: 6/5 = brown; 7/8 = white; 4 = green; 36/37 = yellow

Proline Promag 55S

A0011722

Potential equalization Standard case

Perfect measurement is only ensured when the medium and the sensor have the same electrical
potential. Most Promag sensors have a reference electrode installed as standard, which guarantees the
required potential equalization. This usually means that additional potential equalization measures
are unnecessary.

Promag S:

• Reference electrode is standard for electrode materials 1.4435/316L, Alloy C-22, tantalum,
titanium Gr. 2, Duplex 1.4462, tungsten carbide coating (for electrodes made of 1.4435)

• Reference electrode is optional for electrode material platinum

• Reference electrode not present in measuring tubes with a natural rubber lining in conjunction with
brush electrodes

!

Note!
For installation in metal pipes, it is advisable to connect the ground terminal of the transmitter housing
to the piping. Also, observe company-internal grounding guidelines.

Potential equalization by means of the transmitter's ground terminal

A0004375

8 Endress+Hauser

Proline Promag 55S

AB

!

!

Note!

• For sensors without reference electrodes or without metal process connections, carry out potential
equalization as per the instructions for special cases described below. These special measures are
particularly important when standard grounding practice cannot be ensured or extremely strong
matching currents are expected.

• Sensors with brush electrodes do not have a reference electrode. For this reason, ground disks must
be installed if necessary to ensure sufficient potential equalization to the fluid. This applies in
particular to isolating lined pipes which are not grounded →  9.

Special cases

Metal, ungrounded piping

In order to prevent outside influences on measurement, it is necessary to use ground cables to connect
each sensor flange to its corresponding pipe flange and ground the flanges. Connect the transmitter or
sensor connection housing, as applicable, to ground potential by means of the ground terminal
provided for the purpose (see diagram).
The ground cable for flange-to-flange connections can be ordered separately as an accessory from
Endress+Hauser →  45.

•DN  300 (12"): The ground cable is in direct connection with the conductive flange coating and is
secured by the flange screws (A).

•DN  350 (14"): The ground cable connects directly to the metal transport bracket (B).

Note!
Also, observe company-internal grounding guidelines.

Potential equalization with equalizing currents in ungrounded, metal pipes
(ground cable: copper wire, at least 6 mm

A Installing ground cable at DN ≤ 300 (12")
B Installing ground cable at DN ≥ 350 (14")

Pre-installed ground cable for DN ≤ 300 (12") (order option)

Ground cables which are preinstalled on the sensor flange, are also available. These ground cables can
be mounted and connected electrically to the piping in different ways:

• Using a screw on the side of the pipe flange (a)

• Using the flange screws (b)

• Using a pipe clip installed around the pipe (c)

2

/10 AWG)

Endress+Hauser 9

A0004376

!

a

b

c

Proline Promag 55S

A006117

Possibilities for connecting and mounting pre-installed ground cables
(ground cable: copper wire at least 6 mm

2

/10 AWG)

Plastic pipes and isolating lined pipes

Normally, potential is matched using the reference electrodes in the measuring tube. However, in
exceptional cases it is possible that, due to the grounding plan of a system, matching currents flow over
the reference electrodes. This can lead to destruction of the sensor, e.g. through electro-chemical
decomposition of the electrodes. In such cases, e.g. for fiberglass or PVC pipings, it is therefore
essential that you use additional ground disks for potential equalization. This applies also to two­phase or two-component flow, where the fluid is not well mixed or its constituents are not mixable.

Note!

• Risk of damage by electrochemical corrosion. Note the electrochemical insulation rating, if the
ground disks and measuring electrodes are made of different materials.

• Also, observe company-internal grounding guidelines.

A0004377

Potential equalization/ground disks in the case of plastic pipes or isolating lined pipes
(ground cable: copper wire at least 6 mm

2

/ 10 AWG)

Plastic pipes and isolating lined pipes

In such cases, install the measuring instrument without potential in the piping:

• When installing the measuring device, make sure that there is a terminal assignment between the
two piping runs (copper wire, at least 6 mm2 / 10 AWG).

• When using ground disks in plastic or isolating lined pipes, ensure that they are electrically
connected with each other (copper wire at least 6 mm

2

/ 10 AWG).

• Make sure that the mounting material used does not establish a conductive connection between the
pipe and the measuring device and that the mounting material withstands the torques applied when
the threaded fasteners are tightened during installation.

• Check the galvanic isolation using an insulation tester (protection against contact).

• Also comply with the regulations applicable to potential-free installation.

10 Endress+Hauser

Proline Promag 55S

1

22

!

Cable entries Power-supply and electrode cables (inputs/outputs):

Note!
For the remote version, both the sensor and the transmitter must be installed so that they are
potential-free.

Potential equalization and cathodic protection (connecting cable: copper wire at least 6 mm2 / 10 AWG)

1 Isolation transformer power supply
2 Electrically insulated

• Cable gland M20 × 1.5 (8 to 12 mm / 0.31 to 0.47")

• Cable entries for thread ½" NPT, G ½"

Fieldbus cable:

• Fieldbus connector for PROFIBUS PA, M12 × 1 / PG 13.5 plus adapter PG 13.5 / M20.5

• Fieldbus connector for FOUNDATION Fieldbus, 7/8-16 UNC × M20

Connecting cable for remote version:

• Cable gland M20 × 1.5 (8 to 12 mm / 0.31 to 0.47")

• Cable entries for thread ½" NPT, G ½"

A0004378

Remote version cable specifications

Coil current cable

• 2 × 0.75 mm² (18 AWG) PVC cable with common, braided copper shield (⌀ ~ 7 mm / 0.28")

• Conductor resistance: ≤37 Ω/km (≤0.011 Ω/ft)

• Capacitance: core/core, shield grounded: ≤120 pF/m (≤37 pF/ft)

• Operating temperature:
– Cable not permanently routed: –20 to +80 °C (–4 to +176 °F)
– Cable permanently routed: –40 to +80 °C (–40 to +176 °F)

• Cable cross-section: max. 2.5 mm² (14 AWG)

Electrode cable

• 3 × 0.38 mm² (20 AWG) PVC cable with common, braided copper shield (⌀ ~ 7 mm / 0.28") and
individually shielded cores

• With Empty Pipe Detection (EPD): 4 × 0.38 mm² (20 AWG) PVC cable with common, braided copper
shield (⌀ ~ 7 mm / 0.28") and individually shielded cores

• Conductor resistance: ≤ 50 Ω/km (≤ 0.015 Ω/ft)

• Capacitance: core/shield: ≤ 420 pF/m (≤ 128 pF/ft)

• Operating temperature:
– Cable not permanently routed: –20 to +80 °C (–4 to +176 °F)
– Cable permanently routed: –40 to +80 °C (–40 to +176 °F)

• Cable cross-section: max. 2.5 mm² (14 AWG)

Endress+Hauser 11

a Electrode cable

1
2
3
4
5
6
7

a

b

b Coil current cable

1Core
2 Core insulation
3 Core shield
4 Core jacket
5 Core reinforcement
6 Cable shield
7 Outer jacket

Proline Promag 55S

A0003194

!

As an option, Endress+Hauser can also deliver reinforced connecting cables with an additional,
reinforcing metal braid. We recommend such cables for the following cases:

• Directly buried cable

• Cables endangered by rodents

• Device operation which should comply with the IP 68 (NEMA 6P) standard of protection

Operation in zones of severe electrical interference

The measuring device complies with the general safety requirements in accordance with EN 61010-1,
the EMC requirements of IEC/EN 61326 and NAMUR recommendation NE 21.

Note!
Grounding of the shield is by means of the ground terminals provided for the purpose inside the
connection housing. Keep the stripped and twisted lengths of cable shield to the terminals as short as
possible.

12 Endress+Hauser

Proline Promag 55S

0

1

2.5

[%]

2.0

1.5

1.0

0.5

0

246810 [m/s]

v

5 10 15 20 25 30 32 [ft]0

Performance characteristics

Reference operating conditions

Maximum measured error Pulse output:

!

To DIN EN 29104 and VDI/VDE 2641:

• Fluid temperature: +28 °C ± 2 K (+82 °F ± 2 K)

• Ambient temperature: +22 °C ± 2 K (+72 °F ± 2 K)

• Warm-up time: 30 minutes

Installation:

• Inlet run > 10 × DN

• Outlet run > 5 × DN

• Sensor and transmitter grounded.

• Sensor centered relative to the pipe.

• Standard: ±0.2% o.r. ± 2 mm/s (±0.2% o.r. ± 0.08 in/s)

• With brush electrodes (Option): ±0.5% o.r. ± 2 mm/s (±0.5% o.r. ± 0.08 in/s)
(o.r. = of reading)

Current output:
In addition typically ±5 μA

Note!
Supply-voltage fluctuations have no effect within the specified range.

A0004456

Max. measured error in % of reading

Conductivity

• Max. measuring error not specified

• Without temperature compensation (cell constant is a factory setting)

Repeatability Volume flow

• Standard: max. ±0.1% o.r. ± 0.5 mm/s (±0.1% o.r. ± 0.02 in/s)

• With brush electrodes (Option): max. ±0.2% o.r. ± 0.5 mm/s (±0.2% o.r. ± 0.02 in/s)
(o.r. = of reading)

Conductivity

•Max. ±5% o.r.
(o.r. = of reading)

Endress+Hauser 13

Proline Promag 55S

h2DN³´

Installation

Mounting location The accumulation of air or gas bubbles in the measuring tube could result in an increase in measuring

errors. Avoid the following locations:

• At the highest point of a pipeline. Risk of air accumulating.

• Directly upstream from a free pipe outlet in a vertical pipeline.

A0003202

Mounting location

Installation of pumps

Do not install the sensor on the intake side of a pump. This precaution is to avoid low pressure and the
consequent risk of damage to the lining of the measuring tube. Information on the lining's resistance
to partial vacuum →  23.
It might be necessary to install pulse dampers in systems incorporating reciprocating, diaphragm or
peristaltic pumps. Information on the measuring system's resistance to vibration and shock →  19.

A0003203

Installation of pumps

14 Endress+Hauser

Proline Promag 55S

³´5DN

³ 2

´ DN

h

2

1

!

Partially filled pipes

Partially filled pipes with gradients necessitate a drain-type configuration. The Empty Pipe Detection
function offers additional protection by detecting empty or partially filled pipes.

Note!
Risk of solids accumulating. Do not install the sensor at the lowest point in the drain. It is advisable to
install a cleaning valve.

A0003204

Installation with partially filled pipes

Down pipes

Install a siphon or a vent valve downstream of the sensor in down pipes h ≥ 5 m (16.4 ft). This
precaution is to avoid low pressure and the consequent risk of damage to the lining of the measuring
tube. This measure also prevents the system losing prime, which could cause air inclusions.
Information on the lining's resistance to partial vacuum →  23.

A0008157

Installation measures for vertical pipes

1Vent valve
2Siphon
h Vertical height of the down pipe regarding the sensor

Endress+Hauser 15