Flowserve 3200MD - Manual (Page 29)

User Instructions - Digital Positioner 3200MD LGENIM0059-09 12/13
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9.3 4-20 mA Analog Output Board
The Logix 3200MD digital positioner can be supplied to provide an
analog feedback signal of the stem position. This option can also be
retrofi tted in the fi eld. The 4-20 mA analog output board is wired in
series with a 12.5 to 40 VDC power supply (See Figure 23). This po-
sition feedback option has the following features and specifi cations:
• Does not interfere with positioner operation.
• Calibration of the analog output signal is performed using a HART
375 Handheld Communicator or confi guration software such as
ValveSight.
• In normal operation, the ouput follows the actual position of the
valve whenever possible, including during all failure modes. Dur-
ing loss of power, the output of ≤ 3.15 mA is transmitted. When
confi gured with the safety annunciation feature, the current will fall
below 3.6 mA when safety critical alarms are triggered. The safety
annunciation feature is in effect if the following are both true:
1) The software version is 2.05 - 2.07, or the software version is
2.08 or later and the safety annuciation has been enabled.
2) A safety-critical annunciation is in progress.
See Section 10 for more details.
• Immune to RFI/EMI disturbances.
• Available for explosion-proof and safe applications (CSA, FM). For
I.S. installations a sepatate barrier is required. Refer to product
label and Flowserve drawing 198736
Replacing the 4-20 mA Analog Output Board
To replace the 4-20 mA analog output board, refer to Figures 11,
15 and 25 and proceed as outlined below. The following tools are
required:
• Phillips screwdriver
 WARNING: Observe precautions for handling electrostati-
cally 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 (See Figure 15).
5. Disconnect the two wire connection from the side of the
4-20 mA analog output board.
6. Gently lift the 4-20 mA analog output board off the main PCB
assembly.
7. 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.
8. Connect the two wire connection coming from the User Interface
board to the side of the 4-20 mA analog output board.
9. 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.
10. Connect the Analog Output fi led termination wiring to the Analog
Output terminals on the User Interface board (See Figure 23.)
11. Reinstall all covers.
Figure 23 4-20 mA Analog Output Board
HART
4-20 mA
ANALOG
INPUT OUTPUT
Position Feedback
Current Loop
(Logix Output)
Position Command
Current Loop
(Logix Input)
CAUTION: Isolated Power Sources Required.
12 VDC
to 40 VDC
Power
Supply
4 to 20 mA
Current Source
+
+
–
–
Figure 22: Analog Output Board Power