Flowserve Logix 3200IQ Digital Positioner - Manual (Page 20)

Flowserve Corporation 1350 N. Mountain Springs Parkway 1978 Foreman Dr.
Flow Control Division Springville, Utah 84663-3004 Cookville, TN 38501
www.flowserve.com Phone: 801 489 2233 Phone: 931 432 4021
FCD AXAIM3200-00 9/04 Page: 20 of 32
© 2004, Flowserve Corporation, Printed in USA
Automax Logix 3200IQ Digital Positioner
Installation, Operation and Maintenance Instructions
Main PCB Assembly
The main printed circuit board (PCB) assembly contains
the circuit board and processor that perform control
functions of the positioner. The main PCB is to be
replaced as a unit. None of the components on the main
PCB are serviceable.
Replacing Main PCB Assembly
To replace the main PCB assembly, refer to Figure 14 and
18 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 (see Figure 18).
5. Remove the five wire connections from the main
PCB assembly (six wire connections if the unit is
equipped with the 4-20 mA analog output option)
(see Figure 14).
6. Remove the retaining screw from the main PCB
assembly and lift the main PCB out of the housing
(see Figure 18).
7. Install the new main PCB into the housing. Insert the
retaining screw through the board into the threaded
boss and tighten, using a Phillips screwdriver.
Do not overtighten.
8. If the old main PCB is equipped with a 4-20 mA analog
output board, gently lift the board off the main PCB.
Align the two connectors of the 4-20 mA output board
with the mating sockets on the main PCB and gently
press the connectors together.
9. Reinstall the five wire connections (six wire
connections if the unit is equipped with the 4-20 mA
analog output option) (see Figure 14).
10. 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 (see Figure 18).
11. Reinstall all covers.
12. Reconnect power and air supply to the positioner and
reconfigure the positioner being sure to perform a
stroke calibration.
Pressure Sensor Board
On advanced model Logix 3200IQ positioners, a pressure
sensor board is installed in the positioner. The pressure
sensor board contains two pressure sensors that measure
the pressure on output ports 1 and 2. The main PCB
electronics automatically senses the presence of the
pressure sensor board. If present, the actuator pressure
sensors are used in the positioner control algorithm to
enhance valve stability. For optimal performance, the
actuator pressure sensors need to be calibrated. The
actuator pressure sensor calibration is performed using a
HART 275/375 Handheld Communicator or configuration
software such as SoftTools.
In the standard model, the pressure sensor board is
replaced by a plate that plugs the actuator pressure
sensor ports. This plate can be replaced by a pressure
sensor board to field-upgrade a standard model to an
advanced model.
Removing the Pressure Sensor Board (Advanced Model)
To replace the pressure sensor board, refer to Figures 14,
18 and 28 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 (see Figure 18).
5. Disconnect the ribbon cable on the pressure sensor
board from the PCB assembly (see Figure 14).
6. Remove the two screws holding the pressure sensor
board to the housing. Lift the metal stiffener plate off
the pressure sensor board and set aside for future use.
7. Remove the pressure sensor board.
Removing the Pressure Sensor Plug Plate
(Standard Model)
To upgrade a standard model to an advanced model, the
pressure sensor plug plate must be removed and replaced
by a pressure sensor board. The main PCB electronics
automatically senses the presence of the pressure sensor
board. If present, the actuator pressure sensors are used
in the positioner control algorithm to enhance valve
stability. For optimal performance, the actuator pressure
sensors need to be calibrated. The actuator pressure