Flowserve 520MD User Manual

User Instructions Logix 520MD - LGENIM0520-01 09/09

®

USER INSTRUCTIONS

Logix 520MD Series

Digital Positioner

FCD LGENIM0520-01

Installation

Operation

Maintenance

Experience In Motion

1

User Instructions Logix 520MD - LGENIM0520-01 09/09

STOP!

®

Table of Contents Page

General Information ......................................................................... 2

Unpacking ........................................................................................ 3

Logix 520MD Overview ................................................................... 4

Specifications ................................................................................... 4

Principle of Operation ...................................................................... 5

Tubing .............................................................................................. 6

Wiring .............................................................................................. 6

Cable Requirements ......................................................................... 7

Startup ............................................................................................. 8

Logix 520MD Local Interface Operation ...................................... 8

Operation of Configuration Dipswitch Setup ............................... 8

Calibrations switches .................................................................. 9

Quick-Cal Operation .................................................................... 9

Factory Reset .............................................................................. 10

4-20 mA Analog Output Board .................................................... 10

Error Codes ...................................................................................... 12

Trouble Shooting .............................................................................. 15

Limit switches .................................................................................. 16

Spare parts ...................................................................................... 17

Dimensions ...................................................................................... 18

1 USING FLOWSERVE VALVES, ACTUATORS AND

ACCESSORIES CORRECTLY

1.1 General usage

The following instructions are designed to assist

in unpacking, installing and performing main­tenance as required on FLOWSERVE products.
Product users and maintenance personnel should
thoroughly review this bulletin prior to installing,
operating or performing any maintenance.

In most cases FLOWSERVE valves, actuators

and accessories are designed for specific ap­plications with regard to medium, pressure and
temperature. For this reason they should not be
used in other applications without first contacting
the manufacturer.

1.2 Terms concerning safety

The safety terms DANGER, WARNING, CAU-

TION and NOTE are used in these instructions

to highlight particular dangers and/or to provide
additional information on aspects that may not
be readily apparent.

WARNING: indicates that death, severe personal injury

and/or substantial property damage can occur if proper
precautions are not taken.

CAUTION: indicates that minor personal injury and/or

property damage can occur if proper precautions are
not taken.

NOTE: indicates and provides additional technical

information, which may not be very obvious even to
qualified personnel.

Compliance with other, not particularly emphasised

notes, with regard to transport, assembly, operation
and maintenance and with regard to technical docu­mentation (e.g. in the operating instruction, product
documentation or on the product itself) is essential,
in order to avoid faults, which in themselves might
directly or indirectly cause severe personal injury or
property damage.

1.3 Protective clothing

FLOWSERVE products are often used in problematic

applications (e.g. extremely high pressures, danger­ous, toxic or corrosive mediums). In particular valves
with bellows seals point to such applications. When
performing service, inspection or repair operations
always ensure, that the valve and actuator are depres­surised and that the valve has been cleaned and is free
from harmful substances. In such cases pay particular
attention to personal protection (protective clothing,
gloves, glasses etc.).

1.4 Qualified personnel

Qualified personnel are people who, on account of their

training, experience and instruction and their knowl­edge of relevant standards, specifications, accident
prevention regulations and operating conditions, have
been authorised by those responsible for the safety of
the plant to perform the necessary work and who can
recognise and avoid possible dangers.

1.5 Installation

DANGER: Before installation check the order-no.,

serial-no. and/or the tag-no. to ensure that the valve/
actuator is correct for the intended application.

Do not insulate extensions that are provided for hot

or cold services.

Pipelines must be correctly aligned to ensure that the

valve is not fitted under tension.

DANGER: indicates that death, severe personal

injury and/or substantial property damage will
occur if proper precautions are not taken.

2

Fire protection must be provided by the user.

User Instructions Logix 520MD - LGENIM0520-01 09/09

STOP!

®

1.6 Spare parts

Use only FL O W SERVE ori g inal spar e pa rts.

FLOWSERVE cannot accept responsibility for any
damages that occur from using spare parts or
fastening materials from other manufactures. If
FLOWSERVE products (especially sealing materials)
have been on store for longer periods check these for
corrosion or deterioration before using these products.
Fire protection for FLOWSERVE products must be
provided by the end user.

1.7 Service / repair

To avoid possible injury to personnel or damage to

products, safety terms must be strictly adhered to.
Modifying this product, substituting nonfactory parts,
or using maintenance procedures other than outlined
in this instruction could drastically affect performance
and be hazardous to personnel and equipment, and
may void existing warranties. Between actuator
and valve there are moving parts. To avoid injury
FLOWSERVE provides pinch-point-protection in the
form of cover plates, especially where side-mounted
positioners are fitted. If these plates are removed
for inspection, service or repair special attention is
required. After completing work the cover plates must
be refitted.

1.9 Valve and actuator variations

These instructions cannot claim to cover all details of

all possible product variations, nor can they provide
information for every possible example of installation,
operation or maintenance. This means that the
instructions normally include only the directions to
be followed by qualified personal where the product
is being used for is defined purpose. If there are any
uncertainties in this respect particularly in the event
of missing product-related information, clarification
must be obtained via the appropriate FLOWSERVE
sales office.

2 UNPACKING

Each delivery includes a packing slip. When unpacking,

check all delivered valves and accessories using this
packing slip.

Report transport damage to the carrier immediately.

In case of discrepancies, contact your nearest

FLOWSERVE location.

Apart from the operating instructions and the

obligatory accident prevention directives valid in the
country of use, all recognised regulations for safety
and good engineering practices must be followed.

WA R NING: Before produ c ts ar e ret u rned to

FLOWSERVE for repair or service FLOWSERVE must
be provided with a certificate which confirms that
the product has been decontaminated and is clean.
FLOWSERVE will not accept deliveries if a certificate
has not been provided (a form can be obtained from
FLOWSERVE).

1.8 Storage

In most cases FLOWSERVE products are manufactured

from stainless steel. Products not manufactured
from stainless steel are provided with an epoxy resin
coating. This means that FLOWSERVE products
are well protected from corrosion. Nevertheless
FLOWSERVE products must be stored adequately
in a clean, dry environment. Plastic caps are fitted
to protect the flange faces to prevent the ingress of
foreign materials. These caps should not be removed
until the valve is actually mounted into the system.

3

®

3 LOGIX 520MD OVERVIEW

The Logix 520MD is a two-wire, 4-20 mA input digital valve

positioner with HART communication. The Logix 520MD
positioner controls single-acting actuators with linear
and rotary mountings. The Logix 520MD is completely
powered by the 4-20 mA input signal. The minimum input
signal required to function is 3,6 mA.

4 SPECIFICATIONS

User Instructions Logix 520MD - LGENIM0520-01 09/09

Since the positioner is insensitive to supply pressure

changes and can handle supply pressures from 1,5 to 6 barg
(22 to 87 psig), a supply regulator is usually not required;
however, in applications where the supply pressure is
higher than the maximum actuator pressure rating a supply
regulator is required to lower the pressure to the actuator’s
maximum rating (not to be confused with operating range).
A coalescing air filter is recommended for all applications

Table 1: Input Signal

Input Signal Range 4 - 20 mA (HART)

Compliance Voltage 10 VDC

Voltage Supply (maximum) 30 VDC

Minimum Required Operating
Current

Table 2: Stroke Output

Feedback Shaft Rotation Min. 15°, max 90°

Table 3: Air Supply

Air Supply Quality Free from moisture, oil and dust

Input Pressure Range 1,5 to 6,0 bar (22 to 87 psi)

Air Consumption (steady state)

Table 4: Output Signal

Output Pressure Range 0 to 100% of air supply pressure

Output Flow Capacity 2,4 Nm³/h @ 1,5 bar

Table 5: Shipping Weights

Base Positioner without
Accessories

Table 6: Performance Characteristics (typical)

Linearity < +/- 1,0%

Resolution < 0,1%

Repeatability < 0,2%

Deadband < 0,2%

3,6 mA without AO
3,83 mA with AO

40° recommended for linear
applications

per IEC 770 and ISA-7.0.01

0,08 Nm³/h @ 1,5 bar
(0,047 SCFM @ 22 psi)
0,12 Nm³/h @ 6,0 bar
(0,071 SCFM @ 87 psi)

(1,41 SCFM @ 22 psi)
7,0 Nm³/h @ 6,0 bar
(4,12 SCFM @ 87 psi)

1,2 kg (2,65 lbs)

Table 7: Environmental Conditions

Operating Temperature
Standard

Operating Temperature
Low

Transport and Storage
Temperature

Operating Humidity 0 to 100% non-condensing

Table 8: Hazardous Area Specifications

ATEX II 1 G Ex ia IIC T5 - T6

II 3 G Ex ic IIC T5 - T6

FM

CSA Class I Division 1, Groups A,B,C,D

Table 9: Limit Switches (optional)

Type P&F SJ2-S1N

Load current < 1 mA < 3 mA

Voltage range 5 - 25 VDC

Hysteresis 0,2 %

Temperature -25

Type P&F SJ2-SN

Load current < 1 mA < 3 mA

Voltage range 5 - 25 VDC

Hysteresis 0,2 %

Temperature -40

Type P&F SJ2-N

Load current < 1 mA < 3 mA

Voltage range 5 - 25 VDC

Hysteresis 0,2 %

Temperature -25

Class I, Division 2, Groups A,B,C,D Temp. Class. T4 Ta = 85°C
Class I Zone = Group IIC T4 Ta = 85°C
Class I, Division 2, Groups A,B,C,D Temp. Class. T4 Ta = 85°C

Class I Division 2, Groups A,B,C,D

-20 °C to +80 °C
(-4 °F to +178 °F)

-40 °C to +80 °C
(-40 °F to +178 °F)

-40 °C to +80 °C
(-40 °F to +178 °F)

°C to

100

°C (

°C to

100

°C (

°C to

100

°C (

-13

-40

-13

°F to

°F to

°F to

212

212

212

°F)

°F)

°F)

4

User Instructions Logix 520MD - LGENIM0520-01 09/09

Local
User
Interface

Inner Loop

Piezo Control

Stroke

Inner Loop

Position Feedback

1 Digital Control Circuit

2 Electro-pneumatic
Converter Module

3 Valve Position
Sensor

Filter / Regulator

for Supply Air

1.5 – 6.0 bar (22 – 87 psi)

Air Supply

-

Micro-

Processor

Gain

Pressure Regulator

Piezo Valve

Pneumatic

Amplifier

Control Valve

+

4 – 20 amA

Output

(0ptional)

4 – 20 mA
+ HART

HART

®

Figure 1: Logix 520MD Principle of Operation

due to the close tolerances in the positioner. Optional analog
feedback system as well as limit switch unit and a directly
attachable double acting module complete the Logix 520MD
positioner accessories.

NOTE: The air supply must conform to ISA 7.0.01or IEC 770

(a dew point at least 10 ˚C / 18 ˚F below ambient temperature,
particle size below five microns – one micron recommended
– and oil content not to exceed one part per million).

5 PRINCIPLE OF OPERATION

The Logix 520MD positioner is a digital positioner that incor-

porates HART protocol for communication. The positioner
consists of three main modules:

1. T he m ic rop ro ces so r- ba sed e le ct r on ic con tr ol
module includes HART communications and direct local
user interface switches

2. The piezo valve-based electro-pneumatic converter module

3. The infinite resolution valve position sensor.

The basic positioner operation is best understood by refer-

ring to Figure 1. The complete control circuit is powered
by the two-wire, 4-20 mA command signal. The HART
module sends and receives the superimposed FSK HART

digital communications over the 4-20 mA signal wires
providing two-way remote digital communications to
the microprocessor. The analog 4-20 mA command is
passed to the microprocessor, where it is compared to
the measured valve stem position. The control algo­rithm in the processor performs control calculations
and produces an output command to the piezo valve,
which drives the pneumatic amplifier. The position of
the pilot valve in the pneumatic amplifier is measured
and relayed to the inner loop control circuit. This two­stage control provides for more responsive and tighter
control than is possible with a single stage control
algorithm. The pneumatic amplifier controls the airflow
to the actuator. The change of pressure and volume of
the air in the actuator causes the valve to stroke. As the
valve approaches the desired position, the difference
between the commanded position and the measured
position becomes smaller and the output to the piezo
is decreased. This, in turn, causes the pilot valve to
close and the resulting flow to decrease, which slows
the actuator movement as it approaches, the new
commanded position. When the valve actuator is at the
desired position, the pneumatic amplifier output is held
at zero, which holds the valve in a constant position.

5

User Instructions Logix 520MD - LGENIM0520-01 09/09

®

Table 10: Connection Table

Internal Housing
EARTH Terminal

Shielded Cable

4-20 mA Signal

Connect Shield at Source Ground

-

4-20 mA Current Source

+

Figure 2: Wiring Diagram

6 TUBING POSITIONER TO ACTUATOR

After mounting has been completed, tube the positioner

to the actuator using the appropriate compression fitting
connectors:

Air connections: 1/4” NPT (standard air connection)
Auxiliary power: Pressurized air or permissible

gases, free of moisture and dust in according with
IEC 770 or ISA 7.0.01.

Pressure range: 1,5 – 6,0 bar (22 – 87 psi)
For connecting the air piping, the following notes should

be observed:

1. The positioner passageways are equipped with filters,
which remove medium and coarse size dirt from the
pressurized air. If necessary, they are easily accessible
for cleaning.

2. Supply air should meet IEC 770 or ISA 7.0.01 require­ments. A coalescing filter should be installed in front of
the supply air connection Z. Now connect the air supply
to the filter, which is connected to the Logix 500si series
positioner.

3. With a maximum supply pressure of 6 bar (87 psi) a
regulator is not required.

4. With an operating pressure of more than 6 bar (87 psi),
a reducing regulator is required. The flow capacity of
the regulator must be larger than the air consumption
of the positioner (7 Nm
psi).

5. Connect the outlet connector Y of the positioner to the
actuator with tubing, independent of the action (direct

6

or reverse).

3

/hr @ 6 bar / 4,12 scfm @ 87

Y

Connection Description

+11 Input+ 4..20 mA

-12 Input- 4..20 mA

Z

+31* Output+ 4..20 mA

-32* Output– 4..20 mA

Limit switch 1 - separate board

Limit switch 2 - separate board

Y (0⇒) Pneumatic output signal (outlet)

Z (0⇐) Air supply

* 0ptional

7 WIRING AND GROUNDING GUIDELINES

Electrical connections: signal cable with cable passage

(NPT or M20 x 1,5) to terminals 2 x 2,5 mm

Input signal: 4 – 20 mA

NOTE: Observe the minimum requirements of voltage

and equivalent electrical load: 10,0 VDC / 500 Ω / at
20 mA

The performance is ensured only for a minimum input cur-

rent of 3,6 mA.

For wiring, the following notes should be observed:

NOTE: The input loop current signal to the Logix
520MD should be in shielded cable. Shields must

be tied to a ground at only one end of the cable to
provide a place for environmental electrical noise to
be removed from the cable. In general, shield wire
should be connected at the source. (Figure 2)

Connect the 4-20 mA current source to terminals +11 and

-12 (Figure 2).

Grounding Screw

The grounding screw, located inside the positioner cover,

should be used to provide the unit with an adequate and
reliable earth ground reference. This ground should be tied
to the same ground as the electrical conduit. Additionally, the
electrical conduit should be earth grounded at both ends of
its run. The grounded screw must not be used to terminate
signal shield wires.

Compliance Voltage (Figure 3)

Output compliance voltage refers to the voltage limit the

current source can provide. A current loop system consists
of the current source, wiring resistance, barrier resistance
(if present), and the Logix 520MD impedance. The Logix
520MD requires that the current loop system allow for a 10 VDC
drop across the positioner at maximum loop current.

User Instructions Logix 520MD - LGENIM0520-01 09/09

510

Controller

Voltage

Compliance

Voltage

12V

®

Figure 3: Compliance Voltage

CAUTION: Never connect a voltage source directly across

the positioner terminals. This could cause permanent
circuit board damage.

In order to determine if the loop will support the Logix

520MD, perform the following calculation:

Available Voltage = Controller Voltage (@Current

- Current

MAX

*(R

barrier

+ R

wire

)

The calculated available voltage must be greater than 10

VDC in order to support the Logix 520MD.

Example:

DCS Controller Voltage = 19 V

R

R

CURRENT

barrier

= 25 Ω

wire

= 300Ω

MAX

= 20 mA

Voltage = 19 V - 0,020 A*(300Ω + 25 Ω)

= 12,5 V

The available voltage 12,5 V is greater than the required

10.0

V; therefore, this system will support the Logix 520MD.

The

Logix 520MD has an input resistance equivalent to 500 Ω

at a 20 mA input current.

8 CABLE REQUIREMENTS

The Logix

520MD

digital positioner utilizes the HART
communication protocol. This communication signal is
superimposed on the DC 4-20 mA current signal. The two
frequencies used by the HART protocol are 1200 Hz and
2200 Hz. To prevent distortion of the HART communication,
cable capacitance and cable length restrictions must be cal­culated. The cable length must be limited if the capacitance
is too high. Selecting a cable with lower capacitance/mm

MAX

)

10V

rating will allow longer cable runs. In addition to cable
capacitance, the network resistance also affects the
allowable cable length.

65Ω

C

(µF) < - 0,0032

network

(R

barrier

+ R

+ 390Ω)

wire

Example:

R

= 300 Ω (if present)

barrier

R

C

Max. Cable Length =

Max. Cable Length = = 1111 m

= 50 Ω

wire

72 ρF 0.000072 µF

= =

cable

m m

65

(300 + 50 + 390)

- 0,0032 = 0,08 µF = C

C

(µF)

network

C

cable

0,08 µF

0.000072 µF/m

To control cable resistance, No. 24 AWG cable can be

used for runs less than 1500 m. For cable runs longer
than this, No. 20 AWG cable should be used.

Electromagnetic Compatibility

The Logix 520MD digital positioner has been designed

to operate correctly in electromagnetic (EM) fields
found in typical industrial environments. Care should
be taken to prevent the positioner from being used in
environments with excessively high EM field strengths
(greater than 10 V/m). Portable EM devices such as
hand-held two-way radios should not be used within
30 cm of the device.

520MD

(µF)(Max)

network

7

®

Configuration Switches

User Instructions Logix 520MD - LGENIM0520-01 09/09

LED Status
Lights

Jog Calibrate
Buttons

Gain Selector

4-20 mA Input 4-20,mA Feedback

Figure 4: Logix 520MD Local Interface

Ensure proper wiring and shielding techniques of the

control lines, and route control lines away from elec­tromagnetic sources that may cause unwanted noise.
An electromagnetic line filter can be used to further
eliminate noise (FLOWSERVE Part Number 10156843).

In the event of a severe electrostatic discharge near

the positioner, the device should be inspected to
ensure correct operability. It may be necessary to
recalibrate the Logix 520MD positioner to restore
operation.

9 STARTUP

9.1 Logix 520MD Local Interface

The Logix 520MD local user interface allows the user

to configure the basic operation of the positioner, tune
the response, and calibrate the positioner without
additional tools or configurators. The local interface
consists of a Quick-Cal™ button for automatic zero and
span setting, along with two jog buttons for spanning
valve/actuators with no fixed internal stop in the open
position. There is also a switch block containing eight
switches. Six of the switches are for basic configuration
settings, two are for calibration options. There is also
a rotary selector switch for adjusting the positioner
gain settings. For indication of operational status or
alarm conditions there are three LEDs on the local user

8

interface.

Quick-Cal Button

(Optional)

9.2 Initial DIP Switch Setting

Before placing the unit in service, set the DIP switches in

the “Configuration” and “Cal” boxes to the desired control
options.

NOTE: The switch settings in the Configuration box are

activated only by pressing the Quick-Cal button or by
utilizing the stroke calibration features provided by a
handheld or by Flowserve PC software.

9.2 Operation of Configuration DIP Switches Setup

The first six DIP switches are for basic configuration

1. Air Action – Must be set to match the configuration of

the valve/actuator mechanical configuration.

ATO (air-to-open) – Select ATO if increasing output pres-

sure from the positioner is tubed so it will cause the valve
to open.

ATC (air-to-close) – Select ATC if increasing output pres-

sure from the positioner is tubed so it will cause the valve
to close.

2. Signal at Closed – Normally this will be set to 4 mA for

an air-to-open actuator, and 20 mA for an air-to-close
actuator configuration.

Selecting 4 mA will make the valve fully closed when the

signal is 4 mA and fully open when the signal is 20 mA.

Selecting 20 mA will make the valve fully closed when the

signal is 20 mA and fully open when the signal is 4 mA.

User Instructions Logix 520MD - LGENIM0520-01 09/09

STOP!

®

3. Pos. Characterization

Select Linear if the actuator position should be directly

proportional to the input signal.

Select Optional if another characteristic is desired, which

is set in conjunction with the next switch, labeled Optional
Pos. Char.

4. Optional Pos. Char. – If the Pos. Characterization switch
is set to optional, this switch is active with the following
options:

The =% op tion wi ll cha r acte r ize th e actua tor

response to the input signal based on a standard 30:1 equal
percent rangability curve.

If Custom is selected, the positioner will be characterized to

a custom table that must be set-up ValveSight DTM software
or a HART handheld.

5. Auto Tune – This switch controls whether the positioner will
auto tune itself every time the Quick-Cal button is pressed

On enables an auto tune feature that will automatically de-

termine the positioner gain settings every time a Quick-Cal
is performed based on the setting of the rotary Gain switch.

NOTE: there is a small black arrow indicating the selection.

The slot does not indicate the chosen gain.

Indicator arrow

If the rotary Gain selector switch is set to E with
th e Auto Tune switch On, a Flowserve nominal
response tuning set will be calculated and used.

If the rotary Gain selector switch is set to D, C, B, or A with

the Auto Tune switch On, progressively lower gain settings
will be calculated and used.

If the rotary Gain selector switch is set to F, G, or H with

the Auto Tune switch On, progressively higher gain settings
will be calculated and used.

Off forces the positioner to use one of the factory preset

tuning sets determined by the rotary Gain selector switch.
Settings A through H are progressively higher gain prede-
fined tuning sets. The positioner is preset to Autotune - On
at the factory. This is the recomended setting.

The gain selector operates as a “live” switch. This means

that changes to the switch position while the positioner is in
normal operation will have immediate effect on the control
algorithm.

6. Stability Switch – This switch adjusts the position control
algorithm of the positioner for use with low friction control
valves or high friction automated valves

Placing the switch to the left optimizes the response

for low friction, high performance control valves. This
setting provides for optimum response times when used
with most low friction control valves.

Placing the switch to the right optimizes the response

for valves and actuators with high friction levels. This
setting slightly slows the response and will normally
stop limit cycling that can occur on high friction valves.

9.3 Calibration switches

9.3.1 Setup of the Cal DIP Switch for the Quick

Calibration operating mode

Select Auto if the valve/actuator assembly has an internal

stop in the 100% stroke position. In Auto mode the
positioner will fully close the valve and register the 0%
position and then open the valve to the stop to register
the 100% position when performing a self-calibration.
See detailed instructions in the next section on how to
perform an auto positioner calibration.

Select Jog if the valve/actuator assembly has no cali-

bration stop in the open position. In the Jog mode the
positioner will fully close the valve for the 0% position
and then wait for the user to set the open position using
the Jog buttons labeled with the up and down arrows.
See the detailed instructions in the next section on how
to perform a manual calibration using the Jog buttons.

WARNING: During the Quick-Cal operation the valve

may stroke unexpectedly. Notify proper personnel
that the valve will stroke, and make sure the valve is
properly isolated.

9.4 Quick-Cal Operation

The Quick-Cal button is used to locally initiate a

calibration of the positioner. Pressing and holding the
Quick-Cal button for approximately three seconds will
initiate the calibration. If the Config-Switches option is
enabled, the settings of all the configuration switches
are read and the operation of the positioner adjusted
accordingly. The Gain Selector switch is also read and
action will be taken to adjust the gain according to the
settings of the calibration switches as described in the
previous section. A Quick-Cal can be aborted at any
time by briefly pressing the Quick-Cal button and the
previous settings will be retained.

If the Quick calibration switch (not to be confused

with the Quick-Cal button) is set to Auto and the valve/
actuator assembly has the necessary internal stops, the
calibration will complete automatically. While the cali­bration is in progress you will notice a series of different
lights flashing indicating the calibration progress. When
the lights return to a sequence that starts with a green
light, the calibration is complete. (See the appendix for
an explanation of the various light sequences.)

9

User Instructions Logix 520MD - LGENIM0520-01 09/09

STOP!

STOP!

®

WARNING: When operating using local control of the

valve, the valve will not respond to external commands.
Notify proper personnel that the valve will not respond
to remote command changes, and make sure the valve
is properly isolated.

If the Quick calibration switch is set to Jog, the calibra-

tion will initially close the valve then cause a small jump
in the valve position. The jog calibration process will

only allow the user to manually set the span; zero
position is automatically always set at the seat. If an

elevated zero is needed a handheld or other PC based
configuration software is required. The LEDs will then
flash in a sequence of Y-G-Y-R (yellow-green-yellow­red) which indicates the user must now use the Jog
keys to manually position the valve to the desired 100%
position. Now press both Jog buttons simultaneously to
proceed to the next step. The valve will then stroke and
then wait while flashing the Y-G-Y-R sequence again,
allowing the user to adjust the valve position a second
time to exactly 100% using the Jog buttons. When the
stem is properly positioned press both Jog buttons
simultaneously again to register the 100% position and
proceed. No more user actions are required while the
calibration process is completed. When the lights return
to a sequence that starts with a green light the calibra­tion is complete. (See the appendix for an explanation
of the various light sequences.)

9.5 Local control of valve position

Can be done from the user interface by holding both jog

buttons and then simultaneously pressing the Quick-Cal
button. While in this mode the LEDs will flash a Y-G-Y-Y
(yellow-green-yellow-yellow) sequence. To exit the local
control mode and return to normal operation, briefly
press the Quick-Cal button.

9.6 Factory reset

Hold Quick-Cal button while applying power and all of

the internal variables including calibration will be reset
to factory defaults. The positioner must be re-calibrated
after a factory reset. Tag names and other user config­ured limits, alarm settings, and valve information will
also need to be restored. A factory reset will always
reset the command source to analog 4-20 mA.

9.7 Special settings

Several adjustments to the Logix 520 such as split-

range, MPC, soft stop, etc. cannot be set using the local
interface.

To set these parameters please use ValveSight DTM

software or a HART handheld.

This option can also be retrofitted in the field. The 4-20 mA
analog output board is wired in series with a 12.5 to 40 VDC
power supply (see Figure 5). This position feedback option
has the following features and specifications:

Does not interfere with positioner operation.

Calibration of the analog output signal is performed using a

HART 375 Handheld Communicator or configuration software
such as ValveSight.

Output follows actual position of valve, including all failure

modes of positioner except loss of power. An output of <3.15
mA is transmitted with loss of power to the positioner.

Immune to RFI/EMI disturbances.

Available for intrisically safe applications (ATEX, FM, CSA ).

10.1 Replacing the 4-20 mA Analog Output Board

To replace the 4-20 mA analog output board, refer to Figures

5 and 6 and proceed as outlined below. The following tools
are required:

Phillips screwdriver

WARNING: Observe precautions for handling

electrostatically sensitive devices.

1. Make sure the valve is bypassed or in a safe condition.

2. Disconnect the power and air supply to the unit.

3. Remove the main cover.

4. Remove the plastic board cover by removing the three retain­ing screws.

5. Remove the configuration board

6. Disconnect the two wire connection from the side of the
4-20 mA analog output board.

7. Gently lift the 4-20 mA analog output board off the main PCB
assembly.

8. Align the two connectors on the new 4-20 mA analog output
board with the mating sockets on the main PCB board and
gently press the connectors together.

9. Connect the two wire connection coming from the User
Interface board to the side of the 4-20 mA analog output
board.

10. Replace the configuration board

11. Install the plastic board cover. Insert the three retaining screws
through the plastic cover into the threaded boss and tighten
evenly, using a Phillips screwdriver. Do not overtighten.

12. Connect the Analog Output wiring to the Analog Output
terminals on the User Interface board (see Figure 5.)

13. Reinstall all covers.

10 4-20 MA ANALOG OUTPUT BOARD

The Logix 520MD digital positioner can be supplied to

provide an analog feedback signal of the stem position.

10

User Instructions Logix 520MD - LGENIM0520-01 09/09

®

4 - 20 IN

+11 -12 +31 -32

CAUTION: Isolated Power Sources Required.

4 - 20 OUT

Position Feedback
Current Loop
(Logix Output)

Position Command
Current Loop
(Logix Input)

–

+

12 VDC

–

to 40 VDC
Spannungs-

+

quelle

4 to 20 mA
Current Source

Figure 6: 4-20 mA Analog Output BoardFigure 5: Analog Output Board Power

11

11 LIMIT SWITCH UNIT

STOP!

User Instructions Logix 520MD - LGENIM0520-01 09/09

®

CAUTION: The installation of hazardous location electrical

equipment must comply with the procedures contained in
the certificates of conformance. Country specific regulations
may apply. Electrical safety is determined only by the power
supply device. (Positioner operation with limited voltage
only).

11.1 General

The Logix 520MD digital positioner can be equipped with

an additional limit switch unit.

11.2 Principle of Operation

The lever / coupling moves the vane into the slot of the

limit switches LS1 or LS2. The sensors are designed as a
proximity vane type switch. The switching function is trig­gered if a ferromagnetic object (vane) is inserted between
the coils. The switching point can be set by adjustment of
the vane.

11.3 Installation (Figure 7)

The limit switch unit is fitted to the positioner when delivered

but can be retrofitted. Fit 3 spacer screws (1) to positioner
housing. Place PC board (2) on spacer screws (1), secure
with 3 mounting screws (3).

11.4 Adjusting switches

Use the following procedure to adjust the switches

1. Loosen the two screws on the vane (4), figure 7.

2. Stroke the valve to the first switching position.

3. Set the switching point of the limit switch by adjusting
the lower vane for the lower switch (LS2).

4. Stroke the valve to the second switching position
(LS1).

5. Set the switching point of the limit switch by adjusting
the vane for the upper switch.

6. Tighten the two screws on the vane (4), figure 7.

7. Check the two switching points and repeat the adjust­ment steps 1 to 6, if necessary.

Switches (Figure 8)
Install vane assembly (4) and secure with 2 screws. For

electrical connect see Figure 8.

WARNING: For units installed in Hazardous areas special

installation cautions and procedures are required.

4

3

1

2

Figure 7: Limit switches Figure 8: Switch connections

12

User Instructions Logix 520MD - LGENIM0520-01 09/09

®

12 STATUS CODES

Blink
Code

GGGG
GGGY

GGYG LOCAL INTERFACE DISABLED/ENABLED when DISABLED, in-

GGYY DIGITAL COMMAND SOURCE indicates a HART signal is needed

GGRR SQUAWK MODE ON/OFF (user set) When ON, this indicates a

GYGG POSITION LIMIT ALERT (user set) indicates the position has

GYGY SOFT STOP LIMIT ALERT (user set) indicates the unit is being

GRGG CYCLES or TRAVEL LIMIT ALERT (user set) indicates that one of

YGGY SIGNATURE IN PROGRESS MODE indicates that a test has been

YGGR INITIALIZING MODE displays a blink sequence 3 times when the

YGYG CALIBRATION IS IN PROGRESS indicates a calibration is pro-

YGYY JOG COMMAND STATE indicates the unit has been placed in a

YGYR JOG CALIBRATION STATE indicates that during a jog calibration,

YYGG POSITIONER TEMPERATURE WARNING (user set) indicates the

YYGY PRESSURE OUT OF RANGE WARNING indicates that during a

YYGR SUPPLY PRESSURE HIGH WARNING indicates the positioner

Description Recommendations

NORMAL OPERATION indicates normal, healthy operation

MPC ACTIVE MODE

is active. The command is beyond the user set limit for tight
shutoff feature. This is a normal condition for all valves when
closed. The factory default setting triggers this at command si­gnals below 1%. This indication may also occur on 3 way valves
at both ends of travel if the high MPC value has been set.

dicates PC software has been used to disable the local interface.
This code is only present for a short time when the Quick Cal
button is pressed.

to change the position command and the analog 4-20 mA input
signal is ignored.

user has set the positioner to flash a special sequence so that it
can be visually located.

reached or is exceeding a user defined upper or lower position
indicator similar to a limit switch indicator.

commanded to exceed a user defined upper or lower position
limit and the internal software is holding the position at the limit.
The function is similar to a mechanical limit stop except it is not
active if the unit is un-powered.

the cycle or travel limits has been exceeded. The criterion and
count limit are set by the user to track the usage of the valve.
There are accumulators for total valve travel, total valve cycles,
total spool valve travel, and total spool valve cycles. Flowserve
supplies software can identify the specific limit that has been
reached.

initiated by Flowserve supplied software

unit is powering up.

cess. Calibrations such as stroke may be initiated locally with
the Quick-Cal button or remotely. Other calibrations for the in­puts and outputs or pressure sensors are only initiated remotely.

local override mode where the valve can only be stroked using
the two local jog buttons.

the unit is waiting for the user to manually adjust the valve positi­on to the desired 100% open position.

internal electronics have exceeded a temperature limit. The
mum limit of the electronics and the default setting is -40°F (-40°C).
Low temperature may inhibit responsiveness and accuracy. The
maximum limit of the electronics and default setting is 185°F (85°C).
High temperature may limit the life of the positioner.

pressure sensor calibration, the range of applied pressures to
port 1 was too small for optimum performance.

has determined that the supply pressure is above the user set
warning limit.

(user set) indicates that tight shutoff (MPC)

mini-

If tight shutoff is not desired reset the tight shutoff limits to the correct values or
adjust the command signal inside of the specified MPC value. See DTM screen:
Configuration/Custom/Position Cutoff.

If local control is desired then the local interface must be re-enabled from the
remote software. See DTM screen: Configuration/Basic Local Interface.

A manual Command Source Reset is provided to change the command back to
analog control mode from the local interface if a PC or hand held configurator
is not available. This is done while a QUICK-CAL is in progress by holding
down both the Jog buttons (up and down) while briefly pressing the QUICK­CAL button. A new QUICK-CAL must be done after resetting. See DTM screen:
Dashboard.

This mode is canceled if the Quick-cal button is briefly pressed, the Squawk
mode is selected again remotely, or more than one hour has passed since the
command was issued. See DTM screen: Configuration/Custom/LED.

Reset the indicator if more travel is needed or adjust the command signal back
in the specified range. See DTM screen: Configuration/Custom/Position Cutoff.
This indicator can be disabled.

Reset the limit if more travel is needed or adjust the command signal back in the
specified range. See DTM screen: Configuration/Custom/Soft Limits.

For valve accumulators indications follow routine procedures for maintenance
when the limit is reached such as checking the packing tightness, and checking
linkages for wear, misalignment, and tightness. After maintenance, reset the
cycle accumulator. See DTM screen: Health Status/Positioner Health. This
indicator can be disabled. For spool valve accumulators inspect for high air con­sumption and signs of wear. See DTM screen: Health Status/Positioner Health.
This indicator can be disabled.

Signatures can only be canceled by Flowserve supplied software. See DTM
screen: Diagnostics.

Wait for power up to complete.

Local calibration may be canceled by briefly pushing the quick-cal button. Re­mote calibrations can only be canceled by the software.

Control the valve using the jog buttons. This mode may be canceled by briefly
pushing the quick-cal button.

Use the buttons on the positioner to adjust the valve to the desired fully open
position. See the explanation of Jog Calibrate in the Quick-Cal section of main
document for operation.

Regulate the temperature of the positioner. If the temperature reading is in error,
replace the main board. See DTM screen: Health Status/Positioner Health. This
indicator can be disabled.

Adjust the supply pressure to a proper value (30-150 psig) so the positioner
can properly calibrate the sensors. Then recalibrate. Briefly push the quick-cal
button to acknowledge this condition and the positioner will operate using the
current short stroke calibration values if valid.

Regulate the supply pressure at the positioner below the maximum limit recom­mended for your actuator. Recalibrate pressure sensors. Check the pressure
sensor board connections. Replace pressure sensor board if necessary. See
DTM screen: Health Status/Actuator Health. This indicator can be disabled.

13

User Instructions Logix 520MD - LGENIM0520-01 09/09

®

Blink
Code

YYYG SUPPLY PRESSURE LOW WARNING (user set) indicates that the

YYYY ACTUATION RATIO WARNING (user set) indicates a decreased

YRGG PILOT RELAY RESPONSE WARNING (user set) indicates that the

YRGY FRICTION LOW WARNING (user set) indicates the friction has

YRGR PNEUMATIC LEAK WARNING (user set) indicates that the positi-

YRYG

YRRY ELECTRONIC INABILITY TO FAIL SAFE WARNING indicates that

YRRR PNEUMATIC INABILITY TO FAIL SAFE WARNING indicates that

RGGY FEEDBACK READING PROBLEM DURING CALIBRATION ALARM

RGGR

RGYG

Description Recommendations

supply pressure is below the user set warning limit. Low supply
pressure can cause poor valve response or positioner failure.
The minimum recommended supply pressure is 30 PSI (2.1 bar)
for proper operation. The unit will fail at less than approximately
17 PSI (1.2 bars). Low supply pressure indications can also be
caused by pneumatic leak.

ability of the system to actuate the valve. It is based on the ratio
of available force to required force to actuate. It is affected by the
process load, friction, spring force, and available supply pressure.

pilot relay is sticking or slow to respond. This affects the respon­siveness, increases the chance of limit cycling and excessive air
consumption. The pilot relay is part of the inner loop and con­sists of the driver module assembly with piezo (I-P relay) which
is coupled to the poppet. The value of this indicator corresponds
with inner loop lag. Delayed response can be caused by a partial­ly clogged piezo or debris, oil, corrosion or low supply pressure.

passed below the user set limit.

oner has detected a leak in the actuation assembly. Leakage from
the actuator can cause decreased responsiveness and excessive
air/gas consumption. Low supply pressure can also trigger this
warning.

FRICTION HIGH WARNING

friction has passed the user set limit. High friction can cause
loop oscillations, poor position control, jerky motion, or valve
sticking. It can be caused by build-up from the process on the
stem, trim or seat , by a failing bearing or guides in the valve
and actuator, galling of the trim or stem, excessively tightened
packing, linkages, or other valve/actuator mechanical issues.

the piezo may be damaged. This may prevent the proper failure
position upon loss of signal/power. This condition may occur
briefly on an air-to-close valve that is held for long periods of
time in the closed position, or and air-to-open valve held in the
open position.

upon loss of air supply, the valve may not move to the fail-safe
position. The spring alone is not adequate to overcome the fric­tion and process load in the system. The failsafe spring may have
failed, or it was not sized properly for the application. Friction or
process load may have increased.

indicates that during calibration, the range of motion of the positi­on feedback arm was too small for optimum performance, or the
position sensor was out of range.

INNER LOOP OFFSET TIME OUT ALARM during calibration the
Inner Loop Offset value did not settle. This could result in less
accurate positioning.

NON-SETTLE TIME OUT ALARM indicates that during calibration,
the position feedback sensor did not settle.

(user set) indicates the valve/actuator

Regulate the supply pressure at the positioner above 30 PSI (2.1 bar). Reca­librate pressure sensors. Ensure system air/gas supply is adequate. Repair
kinked supply tubing. Check the pressure sensor board connections and replace
pressure sensor board if necessary. Check for pneumatic leaks in the actuator
and actuator tubing. See DTM screen: Health Status/Actuator Health. This
indicator can be disabled.

Increase the supply pressure. Reduce the friction. Check the actuator spring.
Resize the actuator. Adjust user set limits. See DTM screen: Health Status/
Actuator Health. This indicator can be disabled.

Check response of the valve. If OK, adjust Pilot Relay Response limits. Check
supply pressure. Replace the piezo or driver module assembly. Maintain a clean,
water-free air/gas supply. See DTM screen: Health Status/Positioner Health.
This indicator can be disabled.

Low friction is usually an indication of improperly loaded packing or seals in the
valve and actuator. See DTM screen: Health Status/Valve Health. This indicator can
be disabled.
Repair pneumatic leaks at the tubing junctions and actuator seals. Ensure proper
supply pressure. See DTM screen: Health Status/Actuator Health. This indicator
can be disabled.

Determine if the friction is significantly interfering with the valve control. If not,
consider increasing the friction warning limit. Consider the following to reduce
friction: Stroke the valve to clear off build-up. Clear any external mechanical ob­struction, loosen the packing, clean the stem, repair or replace the actuator. Highly
localized friction or very jerky travel can indicate internal galling. Repair or replace
internal valve components. See DTM screen: Health Status/Valve Health. This
indicator can be disabled.

If alarm persists for more than 30 minutes, the Piezo assembly is damaged and
should be replaced. This indicator can be disabled.

Check for high friction. Repair or replace actuator spring. Reduce process load.
This indicator can be disabled.

Check for loose linkages and/or adjust the feedback pin to a position closer to
the follower arm pivot to create a larger angle of rotation if the feedback rotation
is less than 15 degrees for the total valve travel and recalibrate. Briefly pushing
the quick-cal button acknowledges this condition and the positioner will operate
using the current short stroke calibration if otherwise a good calibration. If the
condition does not clear then adjust the positioner mounting, linkage or feedback
potentiometer to move the position sensor back into range then restart the cali­bration. This error may be cleared by briefly pushing the quick-cal button, which
will force the positioner to use the parameters from the last good calibration.

Repeat the stroke calibration to get a more accurate ILO value. To proceed using
the less accurate ILO value, this error may be cleared by briefly pushing the
quick-cal button. Lowering the gain setting may help if the actuator is unstable
during the calibration. Gain settings can be physically adjusted on the device. A
lower letter represents lower gain.

Check for loose linkages or a loose positioner sensor. This error may be cleared
by briefly pushing the quick-cal button, which will force the positioner to use
the parameters from the last good calibration. This error may appear on some
very small actuators during the initial calibration. Recalibrating may clear the
problem.

14

Blink
Code

RGYY

RGRR

RYYG

RRGG

RRGY

RRGR

RRYG

RRYR

RRRY

RRRR

User Instructions Logix 520MD - LGENIM0520-01 09/09

®

Description Recommendations

NO MOTION TIME OUT ALARM indicates that during calibration,

there was no motion of the actuator based on the current stroke
time configuration.

FACTORY RESET STATE indicates the unit has had a factory reset
and has not yet been calibrated. The unit will not respond to
commands and will remain in the failsafe position until a calibrati­on is successfully completed.

SUPPLY PRESSURE LOW ALARM (user set) indicates that the
supply pressure is below the user set alarm limit. Low supply
pressure can cause poor valve response or positioner failure.
The minimum recommended supply pressure is 30 PSI (2.1 bar)
for proper operation. The unit will fail at less than approximately
17 PSI (1.2 bars). Low supply pressure indications can also be
caused by pneumatic leak.

PILOT RELAY RESPONSE ALARM (user set) indicates that the
pilot relay is sticking or extremely slow to respond. This affects
the responsiveness, increases the chance of limit cycling and
excessive air consumption. The pilot relay consists of the driver
module assembly with piezo (I-P relay) which is coupled to
the spool valve. Delayed response can be caused by a partially
clogged piezo or debris, oil, corrosion, or ice on the spool, or low
supply pressure.

FRICTION LOW ALARM (user set) indicates the friction has
passed below the user set limit. The alarm indicates a more
severe condition than the warning.

FRICTION HIGH ALARM (user set) indicates the valve/actuator
friction has passed the user set limit. The alarm indicates a more
severe condition than the warning. High friction can cause loop
oscillations, poor position control, jerky motion, or valve sticking.
It can be caused by build-up from the process on the stem, trim
or seat, by a failing bearing or guides in the valve and actua­tor, galling of the trim or stem, excessively tightened packing,
linkages, or other valve/actuator mechanical issues.

PIEZO VOLTAGE ALARM indicates the portion of the circuit board
that drives the piezo is bad, or piezo valve itself is bad.

PILOT RELAY POSITION LIMIT ALARM indicates the pilot relay
(spool) appears to be fixed at a limit and is not responding. This
could be due to low supply pressure, a hall sensor that is out
of calibration, a broken piezo, stuck spool, or a wire connection
problem.

ELECTRONICS ERROR OR ALARM indicates the internal data
was not updated correctly. This may affect the function of the
positioner in various ways or not at all. This can be caused when
intermittent operation occurs when connecting power.

POSITION DEVIATION ALARM (user set) indicates the difference
between the command and the actual position has been greater
than the user-set limit for longer than a user-set time.

Check linkages and air supply to make sure the system is properly connected.
If the time out occurred because the actuator is very large then simply retry the
Quick cal and the positioner will automatically adjust for a larger actuator by
doubling the time allowed for movement. This error may be cleared by briefly
pushing the quick-cal button, which will force the positioner to use the parame­ters from the last good calibration.

Calibrate. Proper Valvesight operation will require stroke, actuator, and friction
calibration to be completed. This indicator can be disabled.

Regulate the supply pressure at the positioner above 30 PSI (2.1 bar). Reca­librate pressure sensors. Ensure system air/gas supply is adequate. Repair
kinked supply tubing. Check the pressure sensor board connections and replace
pressure sensor board if necessary. Check for pneumatic leaks in the actuator
and actuator tubing. See DTM screen: Health Status/Actuator Health.

Check response of the valve. If OK, adjust Pilot Relay Response limits. Check
the supply pressure. Check the spool for debris, oil, corrosion, ice on the spool.
Clean or replace the spool assembly. Replace the piezo or driver module assem­bly. Maintain a clean, water-free air/gas supply. See DTM screen: Health Status/
Positioner Health. This indicator can be disabled.

Check for a packing leak. Tighten or replace the valve packing. See DTM screen:
Health Status/Valve Health. This indicator can be disabled.

Determine if the friction is significantly interfering with the valve control. If not,
consider increasing the friction warning limit. Consider the following to reduce
friction: Stroke the valve to clear off build-up. Clear any external mechanical
obstruction, loosen the packing, clean the stem, repair or replace the actuator.
Highly localized friction or very jerky travel can indicate internal galling. Repair
or replace internal valve components. See DTM screen: Health Status/Valve
Health This indicator can be disabled.

If the unit is functioning and controlling replace the piezo, if it does not operate
replace the main circuit board. This indicator can be disabled.

Check for adequate supply pressure. A hall sensor problem may be cleared by
briefly pushing the quick-cal button, which will force the positioner to use the
parameters from the last valid calibration. Check the internal wiring harnesses
for good connections. Check the spool valve for sticking problems. If the
positioner still does not operate replace the piezo, driver module assembly, and/
or spool assembly.

Error may self clear with time. If error persists, cycle power and complete a
Quick-Cal. If the error still persists, Check internal wiring and connectors for
electrical shorts or opens. If no problems are found and alarm persists, replace
the main circuit board.

Review active alarms and warnings to find root causes of this alarm. See DTM
screen: Alerts/Command Deviation. This indicator can be disabled.

13 VERSION NUMBER CHECKING

The version number of the embedded code may be checked at any time except during a calibration by holding down the
Δ button. This will not alter the operation of the unit other than to change the blink sequence to 3 blinks indicating the
major version number. Holding the ∇ button will give the minor version number without affecating operation. The ver­sion codes are interpreted by adding up the numbers assigned according to the following table:

Color First blink value Second blink value Third blink value

Green 0 0 0
Yellow 9 3 1
Red 18 6 2

For example if holding the Δ button gave a G-G-R code, and holding the ∇ button gave a Y-Y-G code then the resulting
version number would be (0+0+2).(9+3+0) or version 2.12.

15

User Instructions Logix 520MD - LGENIM0520-01 09/09

®

14 TROUBLE SHOOTING

Logix 520MD Symptoms and Solutions

Failure Probable Cause Corrective action

No LED is blinking 1. Current source below 3,7 mA 1. Verify current source supplies at least 3,7 mA

2. Incorrect wiring polarity 2. Check wiring for correct polarity

Erratic communications 1. Current source bandwidth not 1. Maximum allowable current source rate of
limited to 25Hz change is 924 mA per second

2. Maximum cable length or cable 2. Check cable conductor size, length and
impedance exceeded capacitance. Refer to ‘Cable Requirements’ on
page 11.

3. HART modem connected to PC RS-232 3. Verify laptop battery is not low
port not receiving enough power

4. Interference with I.S. barrier 4. Must use HART compatible I.S. barrier

5. Current source stripping (filtering) 5. Use the HART filter (VHF) available from
HART signal Flowserve (FLS part-No. 10156843)
Alternatively a 250Ω and a 22 µF capacitor,
installed according to the following schematic
drawing can be used to establish communication

22 µF

250Ω

Control system

Unit does not respond 1. Unit is in digital command mode 1. Switch to analog command mode with ValveSight
to analog commands DTM software or handheld communicator.

2. Error occurred during calibration 2. Correct calibration error. Recalibrate

Valve position reading 1. Stem position sensor mounting 1. Reposition sensor
is not what is expected is off 180 degrees

2. Stroke not calibrated 2. Calibrate stroke

3. Tight shutoff MPC (Minimum 3. No action
position cutoff) is active

4. Custom characterization or soft 4. No action
stops active

Position is driven fully 1. Stroke not calibrated 1. Calibrate valve stroke
open or closed and will 2. Inner-loop hall sensor not connected 2. Verify hardware connections
not respond to command 3. Wrong air action entered in software 3. Check ATO (Air-to-open) and ATC (Air-to-Close)
settings. Recalibrate

4. Actuator tubing backward 4. Verify ATO/ATC actuator tubing

5. Electro-pneumatic converter 5. Replace electro-pneumatic converter
malfunctioning

6. Control parameter inner-loop offset 6. Adjust inner-loop and see if proper control
is too high/low resumes

Sticking or hunting 1. Contamination of the 1. Check air supply for proper filtering and meeting
operation of the positioner electro-pneumatic converter. ISA specifications ISA-7.0.01

2. Control tuning parameters not correct 2. Lower proportional gain settings

16

User Instructions Logix 520MD - LGENIM0520-01 09/09

®

1

2

3

4

Figure 9: Exploded drawing for spare parts

15 SPARE PARTS KITS

Item No. Description Part-No.

1 Cover Assembly Yellow 255240.999.000

White 218771.999.000

Black 218772.999.000

2

PC Board Assembly Logix 520MD
PC Board Assembly analog feedback board

Relay Module Assembly: -20ºC to 85ºC (-4ºF to 185ºF) 230103.999.000

3

Relay Module Assembly: -40ºC to 85ºC (-40ºF to 185ºF) 218773.999.000

4 Repair kit for Potentiometer Assembly 218774.999.000

5 Position Feedback Assembly 218774.999.000

8 Follower Arm Assembly Max. stroke 65 mm 214323.999.000

Max. stroke 110 mm 214322.999.000

Mounting Kits

Description Part-No.

– IEC 534 part 6 (FloTop, Kämmer KA, Kämmer KP, and standard NAMUR linear valves) 213619.999.000

– Rotary VDI/VDE 3845 (DIN ISO 5211) 188151.999.000

– Flowserve direct mounting 214004.999.000

– Linear VDI / VDE 3847 255242.999.000

255349.999.000

255350.999.000

17

®

EXTERIOR
GROUNDING

SCREW

User Instructions Logix 520MD - LGENIM0520-01 09/09

LED WINDOW

22.95

.90

"D" SHAFT OPTION

(STANDARD)

M8

10.00

.39

2.31

57.20

2.25

.09

28.60

1.13

35.40

1.39

M20X1,5 OR

1/2" NPT

64.10

2.52

FRONT VIEW

174.10

6.85

28.60

1.13

G1/4" OR
1/4" NPT

98.14

3.9

10.00

53.00

2.09

4.00

4.80

.2

.4

100.00

.2

"N" SHAFT OPTION

(VDI/VDE 3845, NAMUR)

3.94

32.00

1.3

4.00

.2

17.70

.70

17.70

.70

35.40

1.39

57.20

2.25

M6

M8X1,25 OR 5/16"-18UNC

BACK VIEW

MM

INCH

Figure 10: Dimensional Drawing for the Logix 520MD Series Digital Positioner

18

User Instructions Logix 520MD - LGENIM0520-01 09/09

FIG. 6 - DIMENSIONAL DRAWING FOR OPTIONS

®

216.18

8.51

AUXILIARY OPTIONS - “GA” (GAUGE ADAPTER)

SINGLE PRESSURE GAUGE

1/4" NPT

100.00

3.94

TWO PRESSURE GAUGES

47.63

1.88

100.00

3.94

1/4" NPT

63.50

2.50

216.87

8.54

AUXILIARY OPTIONS - “GM”

DOMED

INDICATOR

100.00

3.94

173.50

6.83

(GAUGE MANIFOLD)

POSITION INDICATOR - “D” (DOMED INDICATOR)

127.69

5.03

MM

INCH

Figure 11: Dimensional Drawing for the Logix 520MD with options

19

Contact:

User Instructions Logix 520MD - LGENIM0520-01 09/09

®

Flowserve Headquarters

5215 N. O'Connor Blvd.
Suite 2300
Irving, Tx. 75039
Phone: [phone]

Flowserve Corporation
Flow Control

1350 N. Mt. Springs Parkway
Springville, UT 84663
USA
Phone: [phone]
Fax: [phone]

Flowserve (Austria) GmbH

Control Valves - Villach Operation
Kasernengasse 6
9500 Villach
Austria
Phone: [phone]
Fax: [phone]

Flowserve Australia Pty Ltd.

14 Dalmore Drive
Scoresby, Victoria 312020
Australia
Phone: [phone]
Fax: [phone]

China

585, Hanwei Plaza
7 Guanghau Road
Beijing, China 100004
Phone: [phone]

Flowserve India Controls Pvt. Ltd

Plot # 4, 1A, E.P.I.P, Whitefield
Bangalore Kamataka
India 560 066
Phone: [phone]
Fax: [phone]

Flowserve Essen GmbH

Manderscheidtstr. 19
45141 Essen
Germany
Phone: [phone]
Fax: [phone]

Flowserve S.A.S.

7, Avenue del la Libération - BP 60
63307 Thiers Cedex
France
Phone: [phone]
Fax: [phone]

Flowserve Pte Ltd.

12 Tuas Avenue 20
Singapore 638824
Singapore
Phone: [phone]
Fax: [phone]

NAF AB

Gelbgjutaregatan 2
SE-581 87 Linköping
Sweden
Phone: [phone]
Fax: [phone]

Kämmer Valves INC.

1300 Parkway View Drive
Pittsburgh, Pa 15205
USA
Tel.: [phone]
Fax: [phone]

All data subject to change without notice

© ©04.2009 Flowserve Corporation. Flowserve and Kämmer are trademarks of Flowserve Corporation

20