INSTRUCTION MANUALCONVEYER FLOW SW ITCH

MODEL： PA-1/PA-2

Meanings of indications for safety used in this Instruction Manual are as follows.
WARNING:

Indicates that improper handling assumes the risk of a fatal or serious injury.

CAUTION:

Indicates that improper handling assumes the risk of injury or damage to property only.

TOWA SEIDEN INDUSTRIAL CO., LTD.
HEAD OFFICETOKYO OFFICENAGOYA OFFICE

Phone: 81-6-6340-5522, Fax: 81-6-6340-5519
Phone: 81-3-5484-2171, Fax: 81-3-5484-2175
Phone: 81-52-937-5817, Fax: 81-52-937-5836

OSAKA PLANT

Phone: 81-6-6340-2831, Fax: 81-6-6349-6551

URL http://w w w .tow a-seiden.co.jp№EPA-1000-1
2009.09.09

Introduction
1. This instruction manual describes the proper handling method and adjustment method, etc.,of the product. Make sure to read the instruction manual before use. In addition, store
this manual so that it can be accessed and referred to as needed.
2. The instruction manual describes our standard specifications. Accordingly, if a productwe delivered has special specifications, the detailed specifications may differ from theproduct described in this manual.
3. Details described in the instruction manual are subject to change without notice.
4. If you find any unclear or erroneous points in the instruction manual, please contact ourcustomer service representative.
5. If modification of a product has been carried out for improvement of quality, alternativeparts or an alternative product may be provided in place of identical parts. In addition,please be advised that the specifications and/or appearance may be changed without notice.
For details, please contact our customer service in the sales department.
6. Modification of a product by a customer is outside the range of our responsibility.
Safety indications used in the instruction manual mean the following .
Warning: Indicates that improper handling assumes the risk of a fatal orinjury.
Caution:Indicates that improper handling assumes the risk of injury or
damage to property or occurrence of physical damage only.

Table of Contents
Introduction
1. Safety precautions･･･ (1)

2. Outline･･･ (2)

3. Specifications･･･ (3)

4. Handling method･･･ (4)

5. Attachment of blade to shaft･･･ (4)

6. Attachment and detachment of cover･･･ (5)7. Blade position and operating points･･･ (5)

8. Adjustment of operating points･･･ (6)

9. Wiring･･･ (6)10. Maintenance･･･ (8)1

1. Safety precautions

Warning・ Before wire connection, make sure to confirm that there is no voltage between theelectric wires. Otherwise, electric shock, electric leak, short-circuit, and ignition mayoccur.
・ Never disassemble the product.
・ Do not store the product under an adverse environment including a place exposed todirect sunlight, rain, or water drops and a place where harmful gas or liquid exists.

Caution・ Make sure to use the product within the specifications.
“Installation environment such as rating and temperature”
・ Before energization, make sure to confirm that there is no error in the wiring.
・ Do not drop or apply a strong impact. Otherwise it may cause a failure.
・ Securely tighten the cover and the conducting wire outlet so that dust or rainwater
does not enter.
・ Make sure to face the conducting wire outlet downward when installing the product.
・ Do not use the product under a corrosive environment (NH3, SO2, Cl2, etc.).

12. Outline
This product is a switch in which a signal is changed by a detected object pressing theblade.
The following diagrams show operating examples on the belt conveyor.
① Normally the blade is positioned at the standby position due to its own weight.
② The detected object pushes the blade up, and when the blade angle exceeds the operating
angle, the signal is changed.

As long as the detected object pushes the blade, this stateis maintained.
③ If there is nothing to detect, the signal is returned.

BladeBlade boss

Main shaft Protector tube Flange(Equivalent) O-RingAluminum cast

Conducting wire outlet

G1/2(L size)

PA-1 L=400 Outline drawing (Standard Specifications)23. Specifications
Model

PA-1/PA-2

Installation method

Flange JIS5K65A (Equivalent)

Blade shape (Standard) *1

150×230 t=1.5

L-size (Standard) *1

400mm

Materials used (main)

Paint color

Blade

SUS304Main shaft

SUS304

Protector tube

SUS304

Flanged case

Aluminum alloy

Cover

Aluminum alloy

Seal

Nitrile rubber, Teflon

Case, cover

10YR7.5/14

Protection level

IP65 or equivalentWorking ambient temperature-10～60°C (no freezing and condensation)

Working pressure

Atmospheric pressure

Conducting wire outlet

G1/2

Conducting wire outlet fitting

Cable compatible outer diameter

Output5～8mm

PA-1…1C, PA-2…2C

Contact capacity

Standard

250 V AC 10 A ; 250 V DC 0.3 A(resistance load)

Z type250 V AC 0.1 A ; 30 V DC 0.1 A

Operating angle (Standard) *1

Approximately 20°

Hysteresis

Approximately 5°

Insulation Resistance

100MΩ or more (500V DC Megger)

Withstand voltage test

1500V AC for one minute

Mass (Standard) *1

Approximately 2.7Kg*1 In the case of specifications other than the standard one, confirm the specifications
according to the delivery drawing.

34. Installation method
Install the product in a place where the blade can detect the flow of a measured object.
When installing, face the conducting wire outlet below and use bolts and packing
according to the standard.

CautionInstall the product so that the conducting wire outlet faces below.

Otherwise,

rainwater will enter, and this may cause a failure.

5. Attachment of blade to shaft① Insert a blade into the shaft while paying attention to the direction of the blade so thatthe main shaft protrudes by approximately 2mm.
② Adjust the notch of the shaft and the blade boss.
③ Reliably tighten the hex socket bolt (M5) to fix the product.

Approx. 2mmShaft notch

46. Detachment and attachment of cover
・ The cover can be attached by screwing.
・ To remove the cover, loosen the screw while paying attention to the O-ring. When
attaching, check that the O-ring does not twist, sufficiently tighten the screw, andreliably screw.

CautionSufficiently and reliably screw the cover.
If the product is used outdoors, rainwater and dust will enter, and this may cause afailure.

7. Blade position and operating point
Conveyer flow switch includes the clockwise action type and counterclock action type.
After confirmation of the customer’s specifications, refer to the following diagrams.
When the blade is positioned at theportion in the diagram, conduction isprovided between the terminals C and H.
The following diagrams show switching of the contacts in the case of an operating point of20°.

Clockwise action typeCounterclockwise action type

ON between terminals C and H
OFF between terminals C and L
OFF between terminals C and H
ON between terminals C and L58. Adjustment of operating point
If adjustment of the operating point is required, loosen the hex socket set screw of the cam
and deviate the position of the cam with respect to the shaft.
Adjustment procedures① Loosen the set screw.
② Rotate the cam to adjust the operating point. If it is rotated upward, the operating
angle is reduced, and if it is rotated downward, the angle is increased.
③ Tighten the set screw to fix the cam.
Counterclockwise action type

Clockwise action type

CautionConfirm that the cam reliably presses the roller of the switch.
In addition, if any screw other than the cam is loosened, the positional relationshipbetween the microswitch and the main shaft will deviate, and this may cause amalfunction.

9. Wiring
9-1. Electric wire and piping used
・ If piping is used, use flexible tubes or Plica tubes (flexible metal conduit) for
installation of piping so that it can be checked later.

In this case, remove theconducting wire outlet fitting, and use a #17 box connector for thick steel. In thecase of a box connector for thin steel, the screw is not applicable.
・ If a cable is used, reliably tighten the conducting wire outlet fitting for fixing. Select acable with an outer diameter of

5～8mm after finishing.

・ Use a strand wire for the core wire of an electric wire. The recommended electric
wire size is 0.5mm2.
・ The terminal block is 6mmn in width and attached with M3 screws.
recommended crimp-type terminal size is R1.25-3.
・ The conducting wire outlet fitting compatible size is65～8mm.

TheCaution
After wiring, tighten the conducting wire outlet fitting.
If it is not securely tightened, rainwater or dust will enter, and this may cause afailure.

CautionAdjust the cable size to the outlet fitting size.
If the cable size is not appropriate, rainwater or dust will enter, and this may causea failure.

9-2. Connection

Warning
Install wiring after confirmation that there is no voltage between the electric wires tobe connected.
Otherwise, electric shock, electric leak, short-circuit and ignition may occur.

・ Install wiring properly with reference to the following terminal array.
・ PA-1 Clockwise action type (when nothing is detected)Not used

・ PA-1 Counterclockwise action type (when nothing is detected)

Not used7

・PA-2 Clockwise action type (when nothing is detected)

・ PA-2 Counterclockwise action type (when nothing is detected)

10. MaintenanceFor periodic inspection, confirm the following items.
・ Check that the case cover is not loosened. If it is not securely tightened, rainwaterand dust will enter, and this may cause a failure.
・ Check that the fixing bolts and screws are not loosened.
・ Check that the blade, main shaft, and protector tube are not bent.

8