KEYENCE AP-30 User Manual

Brown

Black or white

Blue

12 to 24 VDC

0 V

Load

SPECIFICATIONS

Two-color Digital Display
Pressure Sensor

AP-30 Series

Instruction Manual

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PART NAMES AND FUNCTIONS

AUTO key

In auto-tuning mode, use
this key to detect pres­sure. In measurement
mode, press this key for 2
seconds or more to adjust
the zero-point.

SET key

Use this key to display or
change preset values.

Output indicator 2
(Green LED)

Display unit label

Housing

■Display unit label

The AP-30 series enables you to
select the display units for pressure.
Attach the included display unit label
for the desired units at the
position in the figure.

A

Output indicator 1
(Red LED)

UP/DOWN key

Use these keys to
set output modes,
or to change preset
values or units.

Hexagonal
socket bolt

Rear metal casing
(Die-cast zinc)

■ACCESSORIES

• Instruction manual: 1

• Hexagonal-socket
port stopper: 1

• Display unit
label sheet: 1

• Quick reference
sheet: 1

Mounting
bracket A: 1

Mounting
bracket B: 1

CONNECTIONS AND INPUT/OUTPUT CIRCUIT

■Connections

• Drive current load

• Input to voltage input equipment

■Input/output circuit

• Output circuit

Over current

protection circuit

Pressure sensor main circuit

AP-31Z/32Z/33Z/34Z
(Z type only)

Input circuit (Zero-shift input)
Zero-shift input resets the display to
“0” at the rising edge of the signal.

12 to 24 VDC

3.3 k Ω
Pink



Blue

Pressure sensor

main circuit

11 kΩ

Brown

Black or white

Blue

Brown

Black
(Control output 1)
White

(Control output 2)

Blue

AP-31/32/33/34
(Except for Z type)

Analog output circuit

Pressure sensor

main circuit

Protection
circuit

12 to 24 VDC

4.7 k Ω

Load

Voltage output

0 V

12 to 24 VDC

Load

0 V

Pink

Analog
output (+)

Blue

0 V

PIPING/MOUNTING

CAUTION

CAUTION

Preset value A
Preset value b

0

ON

OFF

ON

OFF

Control output 2

(OUT 2)

Control output 1

(OUT 1)

Pressure

Preset value H

SH

SL

Preset value L

0

ON

OFF

ON

OFF

Control output 1

(OUT 1)

Control output 2

(OUT 2)

Pressure

• You can select from three
pressure port positions by
selecting or replacing the
pressure ports. Select the
optimal position based on
your location.

CAUTION

* The arrow shows the pressure port

positions that can be selected.

The maximum tightening torque for the hexagonal socket bolt is

0.3 Nm (Approx. 3 kgf•cm). To avoid breakage, do not exceed the

specified value.

• An Rc (PT) 1/8 internal thread is provided on the pressure port of
the AP-30 series. Commercially available air-pressure pipe joints or
nipples can be used.

• When connecting a joint or a plug,
use a wrench (14 mm) to hold the
metallic part as shown in the figure to
avoid a large force being applied to
the sensor housing (resin part).

• Be sure to block an unused pressure port with the hexagonal-socket
port stopper provided.

CAUTION

The maximum tightening torque for the hexagonal-socket port
stopper is 10 Nm (Approx. 100 kgf•cm). To avoid breakage, do not
exceed the specified value.

• To prevent air leaks, wrap the male screw with sealing tape.

• To mount the AP-30 series to a panel using the panel mounting

holder set (OP-31357), use a panel with 1 to 3.5 mm thickness.

Hexagonal socket bolt

Hold this part with a
wrench (14 mm).

• Special mounting brackets are
included with the AP-30 series.
Use the type of mounting bracket
appropriate for the location
where the sensor is mounted. To
mount the sensor, remove the
hexagonal socket bolts and then
retighten them through the
mounting bracket.

Hexagonal
socket bolts

The maximum tightening torque for the hexagonal socket bolt is

0.3 Nm (Approx. 3 kgf•cm). To avoid breakage, do not exceed the

specified value.

SAFETY PRECAUTIONS

Be sure to follow the instructions below to avoid malfunctions.

■Connection

• When using a commercially available switching regulator, be sure
to ground the frame ground terminals.

• Isolate the sensor’s wiring from power lines or high-voltage lines;
otherwise, the sensor may malfunction due to noise interference.

■Other

• Do not use the AP-30 series for the detection of corrosive gases
or liquid.

• Do not insert any objects, such as wires, from the pressure port.
The pressure-sensing element may break, resulting in malfunc­tions.

• Do not press the front panel keys with a pointed object.

• The AP-30 series does not have an explosion-proof structure.

Do not use it for the detection of flammable gases.

OPERATION MODE SELECTION

■Auto-tuning mode (F-1)

Using the AUTO key, detect the upper limit value (A) and the lower
limit value (b). The detection level (C) is automatically set at the
midpoint between the two values. (You can finely adjust the preset
value C within the range between A and b.)

Control output 1: The sensor turns on when the pressure exceeds the
Control output 2: The sensor turns on when the pressure goes outside

Control output 1
Control output 2

■Hysteresis mode (F-2)

Set desired detection level (H) and hysteresis (h) for the detection.
Control output 1: The sensor turns on when the pressure exceeds the

Control output 2: The sensor turns on when the pressure goes outside

Control output 1
Control output 2

preset value C.
the stability levels.

Pressure

Preset value C

(OUT 1)

OFF

(OUT 2)

OFF

SH

ON

ON

A

SL

b
0

* The stability levels are

automatically set as
shown in the following
calculations.

SH =

SL =

preset value H. When the pressure falls by the preset
value h, the sensor turns off.

the hysteresis width (H - h).

Pressure

Preset value H

H-h

ON

(OUT 1)

OFF

ON

(OUT 2)

OFF

h

0

h: Hysteresis width of
OUT1
* When h is set to a

value close to 0, if
pressure fluctuates
around the detection
point, OUT1 will
chatter.

(A + C)

2

(C + b)

2

■2-independent mode (F-3)

Set two desired detection points (A and B).
Control output 1: The sensor turns on when the pressure exceeds the

preset value A.

Control output 2: The sensor turns on when the pressure exceeds the

preset value b.

■Window mode (F-4)

Set desired upper limit value (H) and lower limit value (L).
Control output 1: The sensor turns off when the pressure goes outside

Control output 2: The sensor turns off when the pressure goes outside

Note 1: The above description shows the operation of control outputs
1 and 2 when the output selector switch is set to N.O.
When the output selector switch is set to N.C., the operation of control
outputs 1 and 2 is inverted.
Note 2: Except for OUT1 in hysteresis mode, each control output
includes an internal hysteresis of 0.5% of F.S.

of the range between the upper limit value (H) and
lower limit value (L).

of the stability levels.

* The stability levels are

automatically set as
shown in the following
calculations.

SH = H –

SL = L +

(H - L)

4

(H - L)

4