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Precautions

WARNING! All wiring must be performed by a qualified electrician 

or instrumentation engineer. See diagram for terminal designa-

tions and wiring examples. Consult factory for assistance. 
WARNING! Avoid shock hazards! Turn signal input, output, and 

power off before connecting or disconnecting wiring, or remov-

ing or installing module.

Précautions

ATTENTION! Tout le câblage doit être effectué par un élec-

tricien ou ingénieur en instrumentation qualifié. Voir le dia-

gramme pour désignations des bornes et des exemples de 

câblage. Consulter l'usine pour assistance.
ATTENTION! Éviter les risques de choc! Fermez le signal 

d'entrée, le signal de sortie et l'alimentation électrique avant 

de connecter ou de déconnecter le câblage, ou de retirer ou 

d'installer le module. 

Electrical Connections

See wiring diagrams at right. Polarity must be observed when 

connecting the signal input or feedback.

*

 Do not make any connections to unused terminals or use 

them as wiring junctions for external devices. This may cause 

permanent damage to the module!
See the model/serial number label for module information, 

power requirements, options, or if a custom version was speci-

fied. Input and feedback ranges are factory pre-configured (at 

24°C ±1°C).

Control Input

The input range is factory configured. See the model/serial 

number label for input type, range, and options.
See diagrams for terminal designations and wiring examples. 
If a 4-20 mA control input is specified the module does not 

provide power to the loop. The 4-20 mA signal must be from a 

powered transmitter or a loop with a power supply. 

Potentiometer (Slidewire) Feedback Signal

See diagrams for terminal designations and wiring examples.

Voltage (M01) or mA (M420) Feedback Signal

See diagrams for terminal designations and wiring examples. 

Polarity must be observed.
The APD 3200 M420 uses a 4-20 mA feedback signal. The 

module does not provide power to the loop, thus the feedback 

signal must be from a powered transmitter or a loop with a 

power supply.

Relay Output Terminals

See diagrams for terminal designations and wiring examples.

Module Power Terminals

Check model/serial number label for module operating voltage 

to make sure it matches available power.
When using DC power, either polarity is acceptable, but for 

consistency with similar API products, positive (+) can be wired 

to terminal 13 and negative (–) can be wired to terminal 16.

Mounting to a DIN Rail

Install module vertically on a 35 mm DIN rail in a protective 

enclosure away from heat sources. Do not block air flow. Allow 

1" (25 mm) above and below housing vents for air circulation.
1.  Tilt front of module downward and position against DIN rail. 
2.  Clip lower mount to bottom edge of DIN rail.
3.  Push front of module upward until upper mount snaps into 

place.

Removal

1.  Push up on the bottom back of the module.
2.  Tilt front of module downward to release upper mount 

from top edge of DIN rail. 

3.  The module can now be removed from the DIN rail

Calibration

For most applications the deadband is the only required adjustment.
1.  Deadband is normally adjusted after installation is complete.
2.  Turn the deadband potentiometer counterclockwise to minimum.
3.  Provide a near mid-level control input signal.
4.  Allow the valve to stabilize.
5.  If overshoot, oscillation, or hunting are detected, slowly 

increase the deadband clockwise to eliminate the oscillation.

Input zero and span normally do not need to be adjusted. 
1.  If adjustment is required, apply a control input that repre-

sents the fully closed position.

2.  Adjust the zero control to just close the valve.
3.  Apply a full open control input signal.
4.  Adjust the span control to just fully open the valve.

Operation

The APD 3200 provides an excitation voltage to the feedback 

potentiometer on the valve or valve actuator and monitors 

its position. If the difference between the control signal and 

the feedback signal is greater than the deadband setting, the 

appropriate relay is energized to actuate the positioning motor.
The APD 3200 M01 has a voltage feedback signal and control 

signal input (unless another voltage range was specified). The 

difference between the control signal input and the feedback 

signal is compared to the deadband setting. If the difference 

between the two is greater than the deadband setting, the appro-

priate relay contact is energized to actuate the positioning motor.
The APD 3200 M420 uses a 4-20 mA control signal input and 

feedback signal (unless another current range was specified). 

The difference between the control signal input and the feedback 

signal is compared to the deadband setting. If the difference 

between the two is greater than the deadband setting, the appro-

priate relay contact is energized to actuate the positioning motor.
The LoopTracker

®

 input LED provides a visual indication that 

a signal is being sensed by the input circuitry of the module. It 

also indicates the input signal strength by changing in intensity 

as the process changes from minimum to maximum to provide 

a quick visual picture of your process loop at all times. 
If the LED fails to illuminate, or fails to change in intensity as 

the process changes, this may indicate a problem with module 

power or signal input wiring. This features greatly aid in saving 

time during initial start-up or troubleshooting.

Control Relays

For all versions an electronic lockout circuit is used to prevent 

both relay contacts from closing simultaneously. When the 

input and the feedback signals are equal, the relay contacts 

will go to the neutral position. 
The bi-color relay LED provides a visual indication of the relay 

status. In all configurations, a green LED indicates a valve open 

relay position and a red LED indicates a valve closed relay posi-

tion. In the neutral position, the LED will be off.

Manual/Auto Mode

Switching the top-mounted toggle switch to Manual allows the 

Open and Close push buttons to be used to position the valve 

independent of the control and feedback signals. The manual 

mode is useful for troubleshooting, calibration, system testing, 

or as a manual bypass. The bi-color relay LED indicates the 

controller’s Open/Close relay contact status. Switching to Auto 

mode allows normal operation.

Instructions 

APD 3200

Type of Input Device

– Terminal  + Terminal

Voltage signal

9 (

–)

11 

(

+)

mA (current) signal that provides 

power to the current loop.  

Typically a 3 or 4-wire transmitter.

9 (

–)

11 

(

+)

mA (current) signal that is unpow-

ered. Typically a 2-wire device.  

APD module provides loop power.

11 (

–)

10 

(

+15 V)

To maintain full isola-

tion avoid combining 

power supplies in 

common with input, 

output, or unit power.

13  Power AC or DC +
14 

Earth Ground

16  Power AC or DC –

14

13

15

16

Zero

Deadband

Relay

Span

Input

Auto

Manual

Close

Open

Loop
Tracker

APD 3200

Valve Positioner /

Actuator / Controller

6

5

7

8

2

1

3

4

Feedback 

Potentiometer

Motor

Bi-directional 

Valve Motor

Valve

Open Com Close

Close Wiper Open

– 

+

6

5

7

8

2

1

3

4

Voltage 

Feedback

Motor

Bi-directional 

Valve Motor

Valve

Open Com Close

Close Pos. 

V

– 

+

6

5

7

8

2

1

3

4

4-20 mA 

Feedback

Motor

Bi-directional 

Valve Motor

Valve

Open Com Close

Close Pos. 

mA

10

9

11

12

 

+15V

 –

Current Sourcing Input

mA Xmtr

R

i

Passive mA 

Transmitter

10

9

11

12

–  

+

Powered  

4-20 mA  

Xmtr

Sinking Input

Externally 

Powered mA 

Transmitter

10

9

11

12

–  

+

Current Sinking Input

mA Xmtr

R

i

+

Loop 

Power 

Source

mA Transmitter 

with Separate  

Loop Supply

10

9

11

12

–  

+

Voltage Input

Voltage 

Xmtr

Voltage 

Input

APD3200

APD3200 M01

APD3200 M420

Cu 60/75°C 

conductors 

14 AWG 

max.

1  2  3  

4

5  6  7  

8

9 10 11 

12

13 14 

15

 16

Input

Relay Output

Power

Feedback

api-usa.com

1220 American Way Libertyville, IL 60048 
Phone: 

800-942-0315

 

Fax: 800-949-7502

A

A

BSOLUTE

BSOLUTE

 P

 P

ROCESS

ROCESS

 I

 I

NSTRUMENTS

NSTRUMENTS

Wire terminal 
torque 
0.5 to 0.6 
Nm or 
4.4 to 5.3 
in-lbs

API maintains a constant effort to upgrade and improve its products. 

Specifications are subject to change without notice. See api-usa.com for 

latest product information. Consult factory for your specific requirements.

WARNING:

 This product can expose you to chemicals includ-

ing nickel, which are known to the State of California to cause 

cancer or birth defects or other reproductive harm. For more 

information go to www.P65Warnings.ca.gov

 * Do not make connections 

to unused terminals!

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