Replacing The Lcd Board; Replacing An Auxiliary Card; Figure 48: Inner Cover; Figure 49: Lcd - Flowserve Logix 520MD+ User Instructions

Digital positioners
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18.5 Replacing the LCD Board

The LCD board connects to the main board providing additional func-
tionality at the local user interface.
Removal
1.
Make sure the valve is bypassed or in a safe condition.
2.
Disconnect power to the positioner.
3.
Remove the inner cover by removing the 6 inner cover retaining
screws. See Figure 48.
4.
Unscrew the 4 screws holding the LCD Board in place.
See Figure 49.
5.
Gently pry the locking feature on the connector with a small flat
screwdriver and separate the connector from the main board. Be
careful not to pull the cable, as this may cause damage to the cable.
Installation
1.
Connect the LCD Board to the Main Board using the cable. Ensure
the connector's locking features engage.
2.
Align the LCD Board with the 4 stand-offs on the main board.
3.
Screw the LCD Board to the 4 stand-offs.
4.
Replace the Inner Cover.
NOTE: The LCD backlight may change brightness during use. This
is normal. The backlight uses any residual power not used by
other functions of the circuitry. When current supply is low (4mA)
the light will appear darker. When current supply is high (20mA)
the light will appear brighter.
Inner
Cover
Screws

Figure 48: Inner Cover

Logix
520MD+ and 510+ Digital Positioners FCD LGENIM0105-15-AQ – 05/16
®

18.6 Replacing an Auxiliary Card

Up to two auxiliary cards can be installed at a time. Each communicates
independently to the main processor, though only one cable is used to
connect both cards. See Figure 50.
Removal
1.
Make sure the valve is bypassed or in a safe condition.
2.
Disconnect the power to the positioner.
3.
Remove the main cover.
4.
Disconnect the two wire connection from the side of the Card.
5.
Unscrew and remove the auxiliary card clips.
6.
Gently slide the card from the slot. (If two cards are present,
remove both cards from the slots.)
7.
Gently pry the locking feature on the connector with a small flat
screwdriver and separate the connector from the card. Be careful
not to pull the cable, as this may cause damage to the cable.
8.
Replace the second card (if present) back into the slot.
9.
Replace the auxiliary card clips.
Installation
1.
Make sure the valve is bypassed or in a safe condition.
2.
Disconnect the power to the unit.
Inner
3.
Remove the main cover.
Cover
4.
Unscrew and remove the auxiliary card clips.
Screws
5.
If a card is present, gently slide the card from the slot to access
the internal connector.
6.
Connect the card to the main board using the internal connector
cable. Ensure the connector's locking features engage.
7.
Gently slide the card(s) into the slot(s).
a
CAUTION: Ensure proper circuitry is used before connecting cables
to the auxiliary card. See section 7 ELECTRICAL CONNECTIONS for
more information.

Figure 49: LCD

flowserve.com
LCD
Screws
59

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Liam O'Keeffe
January 17, 2025

can the positioner be set to not exceed a certain % position

This manual is also suitable for:

Logix 510+

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