Precautions
WARNING! All wiring must be performed by a qualified electrician
or instrumentation engineer. See diagram for terminal designations
and wiring examples. Consult factory for assistance.
WARNING! Avoid shock hazards! Turn signal input, output,
and power off before connecting or disconnecting wiring, or
removing or installing module.
Précautions
ATTENTION! Tout le câblage doit être effectué par un électricien
ou ingénieur en instrumentation qualifié. Voir le diagramme
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. Observe polarity.
*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!
Range Selection
Select input range before installing the module on the DIN rail.
The module label and the table below list the input ranges.
Special ranges will be on the module model/serial number
label. Input and feedback ranges are factory calibrated (at
24°C ±1°C).
Use slide switch "A" and rotary switches "B" and "C" on the side
of the module to select the input range to match your application.
Switch A: Set to "V" for voltage input or "I" for current input
Switch B: Input range
Switch C: Input offset
For ranges that fall between the listed ranges use the next
highest setting and trim the input signal with the zero and span
potentiometers as described in the Calibration section.
Feedback Signal
Any full-range (zero to max.) potentiometer within the specified
ranges may be used.
Relay Output
Use an appropriate RC snubber if the inductive load exceeds
relay specifications. See Relay Rating chart on other side.
Input Connections
Polarity must be observed when connecting the signal input.
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, wire positive (+) to terminal 25 and negative (–)
to terminal 28.
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 down and position the lower spring clips
against the bottom edge of DIN rail.
2. Push front of module upward until upper mount snaps into place.
Removal
Avoid shock hazards! Turn signal input, output, and power off.
1. Push up on bottom back of 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.
Note: Perform the following calibration procedure any time
switch settings are changed.
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
represents 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 3280 provides an excitation voltage to the feedback
potentiometer on the 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 contact is energized to actuate the positioning motor.
Green 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—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.
Bi-Color Relay LED—Provides a visual indication of the relay status.
Green LED Valve opening relay position
Red LED Valve closing relay position
LED off Neutral position
Manual/Auto Mode—Switching to Manual allows the Open
and Close buttons to be used to position the valve manually
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.
Spring
Clip
Upper
Mount
Lower
Mount
Instructions APD 3280
Input Switch
A B C
0-50 mV V80
0-100 mV V90
0-200 mV VA0
0-250 mV VC0
0-400 mV VB0
0-500 mV V00
0-1 V V10
0-2 V V20
0-2.5 V V40
0-4 V V30
1-5 V V3E
0-5 V V50
0-10 V V60
±5 V V65
±10 V V75
0-1 mA IC0
0-2 mA I00
0-4 mA I10
0-8 mA I20
2-10 mA I2E
0-10 mA I40
0-16 mA I30
4-20 mA I3E
0-20 mA I50
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 unpowered.
Typically a 2-wire device.
APD module provides loop power.
11 (–) 10 (+15 V)
Zero
Deadband
Relay
Span
Input
Auto Manual
Close Open
Loop
Tracker
APD 3280
Valve Positioner /
Actuator / Controller
65 7 8
21 3 4
Feedback
Potentiometer
M
Bi-directional
Valve Motor
Valve
Open Com Close
Close Wiper Open
To maintain full isola-
tion avoid combining
power supplies in com-
mon with input, output,
or unit power.
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
AABSOLUTEBSOLUTE PPROCESSROCESS IINSTRUMENTSNSTRUMENTS
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
13 Power AC or DC +
14 Earth Ground
16 Power AC or DC –
1413 15 16
109 11 12
– +
Voltage Input
Voltage
Xmtr
Cu 60/75°C
conductors
14 AWG
max.
Current Sinking Input
+ –
– +
–
+
Loop
Power
Source
mA
Xmtr
Ri
109 11 12
Module mA input is
unpowered
mA
Xmtr
Ri
10911 12
+15V –
Current Sourcing Input
Module powers
mA input loop
mA input: determine if transmitter has a passive or powered output.
The module can be wired for a sinking or sourcing mA input.
* Do not make connections
to unused terminals!
* Do not make connections
to unused terminals!
