INSTRUCTION MANUALCONVEYER FLOW SWITCH

MODEL： PAF

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

URL http://w w w .tow a-seiden.co.jp№EPA1001-1
09/09/09

Introduction
1.

This instruction manual describes to the proper method for using and adjusting theproduct. Please be sure to read this manual before using the product. Keep thismanual where it is easily accessible for reference as required.

2.

This instruction manual describes the standard specifications. If the product you
purchased is based on special specifications, the details may differ from the product.

3.

The information presented in this instruction manual is subject to change withoutnotice.

4.

If you have any questions or notice any errors in this manual, please contact our sales
representatives.

5.

In the event we modify the product to improve quality, we may sometimes offer
alternative parts rather than original parts or an alternate product to our customers.
Please understand that the specifications and appearance of the product are subject
to change without notice. For more details, please contact our sales representatives.

6.

Any modifications or repairs to the product made by the customer will invalidate thewarranty, and we shall not be liable for the consequences resulting from themodifications or repairs.

Safety indications used in this instruction manual have the following meanings:
Warning: This means that improper handling of the product may lead to deathor serious injury.
Caution: This means that improper handling of the product may cause injury
and physical property damage only.

Table of Contents
Introduction
1. Safety Precautions ································(1)

2. Outline ···················································(2)

3. Specifications ········································(3)

4. How to Mount the Product ····················(4)

5. Mounting the Vane on the Shaft ···········(4)6. Mounting and Dismounting the Cover ···(5)7. Vane Position and Operation Point ········(5)

8. Wiring ····················································(6)

9. Maintenance ·········································(7)

1. Safety Precautions

Warning・ When wiring, check that no voltage is supplied to wires before starting any wiringwork. Failure to do so may result in electric shock, electric leaks, short circuits, orcombustion.
・ NEVER disassemble the product.
・ Do not remove the screws securing the spring case. The spring may pop up.
・ Do not store the product where it will be exposed to direct sunlight, rain or water,or hazardous gas or liquids.

Caution・ Be sure to use the product within the range of specifications.
“Ratings and installation environment such as temperature.”・ Check that the wiring has been implemented properly before supplying electricpower.
・ Avoid dropping or exposing the product to impacts. Failure to do so may result indamage.
・ Thoroughly secure the cover and the conductor outlet to prevent dust andrainwater from entering the product.
・ When installing the product, be sure that the conductor outlet faces downward.
・Do not expose the product to a corrosive atmosphere (such as NH3, SO2, andCl2).

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2. Outline
This product is a switch that changes the signal when an object pushes the vane heldby a spring.
The figure below illustrates an example where the product is installed in a chute.
① Normally, the vane is held by the force of the spring.
② When an object pushes the vane a certain degree and exceeds the activation angle,
the signal changes. The situation is held as long as the object is pushing the vane.
③ When the object is gone, the signal returns to its original state.

VaneVane boss

Main shaft

Protectivetube

Flange(equivalent) O-ringCast aluminum

Conductor outlet
G1/2゛(L dimension)

PAF L = 350 Outline drawing (Standard specifications)23. Specifications
TypePAF

Mounting method

Flange JIS5K65A (equivalent)

Vane shape (Standard) *1

100 x 140 t = 1.5

L dimension (Standard) *1

350 mmMaterial used

VaneSUS304(main)

Main shaft

SUS304

Protective tube

SUS304

Chassis with flange

Aluminum alloy

Cover

Aluminum alloy

Sealing

Nitrile rubber, Teflon

Chassis, Cover

10YR7.5/14

Painting color

Protection ratings

IP – 65 equivalent

Ambient temperature during use-10ºC to +60°C (No condensation or congelation)

Pressure during use

Atmospheric pressure

Conductor outlet

G1/2

Conductor outlet fastening hardware

Matching cable outer diameter Φ5 – 8 mm

Output1C

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

Activation angle (Standard) *1

About 20°

Operating torqueAbout 20 N cmHysteresis

About 5°Insulation resistance

100 MΩ or more (DC 500 V Megger)

Withstand voltage test

AC 1500 V 1 minute

Mass (Standard) *1

2.6 kg*1 For specifications other than the standard specifications, check the documentsthat accompany the product.

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4. How to Mount the Product・ Mount the product where the vane can detect the flow of the target object.
・ In mounting the product, set the conductor outlet facing downward and use bolts
and gaskets complying with the standards.

CautionIn mounting the product, be sure that the conductor outlet faces downward.
Failure to do so may lead to intrusion of rainwater resulting in failure.

5. Mounting the Vane onto the Shaft
The method of mounting the vane varies depending on the direction of operation. Checkthe specifications before starting work.
① Insert the vane onto the main shaft so that it is horizontal to the conductor output.
The main shaft should protrude by 2 mm.
② Tighten the hexagonal socket head bolts (M5) to secure the vane.

Clockwise operation type

About 2 mm

Clockwise operation typeCounterclockwise operation type4

6. Mounting and Dismounting the Cover・ The cover employs threaded mounting.
・ To dismount the cover, loosen the screw while paying close attention to the O-ring.
In mounting the cover, check that the O-ring is free from distortion and then firmly
screw the cover on.

CautionBe sure that the cover is thoroughly and tightly screwed on.
Failure to do so may lead to intrusion of rainwater and dust resulting in
failure when the product is used outdoors.

7. Vane Position and Operating Point
Passage alarm switches are available in clockwise and counterclockwise directional
operation type. Check the specifications and then refer to the description below.
If the vane is positioned at, terminals C and H are conductive.

The following figure shows the switching of contacts assuming an activation point of 20°.

Clockwise operation typeCounterclockwise operation type

Between Terminals C – H ON
Between C – L OFF
Between Terminals C – H OFF
Between C – L ON5

8. Wiring
8-1 Wires and tubes used・ When using tubes, employ flexible tubes or plica tubes to facilitate later
inspections. In this case, remove the fastening hardware of the conductor outlet
and use #17 box connector for thick steel applications. With connectors for thinsteel applications, the screw does not fit.
・ When using a cable, secure the cable by tightening the fastening hardware of theconductor outlet firmly. Use cable with a finished outer diameter of Φ5–8 mm.
・ Use cable with twisted core wires. Wire size of 0.5 mm2 is recommended.
・ The terminal block uses 6 mm wide M3 screws for mounting. The crimp terminal
size of R1.25 - 3 is recommended.
・ Proper size for the conductor outlet fastening hardware is Φ5–8.0 mm.

Caution
After wiring, tighten the conductor outlet fastening hardware firmly.
Insufficient tightening may lead to intrusion of rainwater and dust
resulting in failure.

CautionBe sure to use the proper size cable. Use of the wrong size cable maylead to intrusion of rainwater and dust resulting in failure.

68-2 Connection

Warning
Check that no voltage is supplied between the cables to be connected
before starting any wiring. Failure to do so may result in electric shock,electric leaks, short circuits, or combustion.
・ Check the terminal alignment shown below to implement correct wiring.
・ Clockwise operation type (No detection status)

Not in use

Counterclockwise operation type (No detection status)

・

Not in use

9. MaintenanceDuring the periodic checks, inspect the following items:
・ Check that the chassis cover is tightly secured. A loose cover may lead to intrusionof rainwater and dust resulting in failure.
・ Check that the fixed screws are tight and not loose.
・ Check that the vane, main shaft, and protective tube have no bends.

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