rotork YT-850 Series User manual

Limit Switch Box PRODUCT MANUAL
YT-850 Series
Rotork YTC Limited
VERSION 1.16

Limit Switch Box
YT-850 Series Product Manual
Ver. 1.16 2
Contents
1Introduction..................................................................................................................................................3
1.1 General Information for the users.........................................................................................................3
1.2 Manufacturer Warranty.........................................................................................................................3
2Product Description....................................................................................................................................4
2.1 General.................................................................................................................................................4
2.2 Main Features and Functions ...............................................................................................................4
2.3 Label Description..................................................................................................................................4
2.4 Product Code........................................................................................................................................5
2.5 Product Specification............................................................................................................................5
2.6 Certifications.........................................................................................................................................6
2.7 Parts and Assembly..............................................................................................................................6
2.8 Product Dimension ...............................................................................................................................7
2.9 Bracket Dimension................................................................................................................................8
3Installation....................................................................................................................................................9
3.1 Safety....................................................................................................................................................9
3.2 Installation.............................................................................................................................................9
4Connections - Power................................................................................................................................ 10
4.1 Mechanical Type (2 x SPDT)............................................................................................................. 10
4.2 Inductive proximity sensor (x 2, NPN type) ....................................................................................... 10
5Adjustments...............................................................................................................................................11
5.1 Upper Switch Adjustment....................................................................................................................11
5.2 Lower Switch Adjustment....................................................................................................................11

Limit Switch Box
YT-850 Series Product Manual
Ver. 1.16 3
1 Introduction
1.1 General Information for the users
Thank you for purchasing Rotork YTC Limited products. Each product has been fully inspected after
its production to offer you the highest quality and reliable performance. Please read the product
manual carefully prior to installing and commissioning the product.
➢Installation, commissioning, and maintenance of the product may only be performed by trained
specialist personnel who have been authorized by the plant operator accordingly.
➢The manual should be provided to the end-user.
➢The manual can be altered or revised without any prior notice. Any changes in product’s
specification, design, and/or any components may not be printed immediately but until the
following revision of the manual.
➢The manual should not be duplicated or reproduced for any purpose without prior approval from
Rotork YTC Limited, Gimpo-si, South Korea.
➢In case of any other problems that are not stated in this manual, please make immediate contact
to Rotork YTC Limited.
1.2 Manufacturer Warranty
➢For the safety, it is important to follow the instructions in the manual. Manufacturer will not be
responsible for any damages caused by user’s negligence.
➢Any modifications or repairs to the product may only be performed if expressed in this manual.
Injuries and physical damages caused by customer’s modifying or repairing the product without
a prior consultation with Rotork YTC Limited will not be compensated. If any alterations or
modifications are necessary, please contact Rotork YTC Limited directly.
➢The warranty period of the product is (18) months from the date of shipment unless stated
otherwise.
➢Manufacturer warranty will not cover products that have been subjected to abuse, accidents,
alterations, modifications, tampering, negligence, misuse, faulty installation, lack of reasonable
care, repair or service in any way that is not contemplated in the documentation for the product,
or if the model or serial number has been altered, tampered with, defaced or removed; damages
that occurs in shipment, due to act of God, failure due to power surge, or cosmetic damage.
Improper or incorrectly performed maintenance will void this limited warranty.
➢Plug an unused conduit entry with a plug to prevent foreign materials from entering.
➢For detailed warranty information, please contact the corresponding local Rotork YTC Limited
office or main office in South Korea.

Limit Switch Box
YT-850 Series Product Manual
Ver. 1.16 4
2 Product Description
2.1 General
Limit switch box YT-850 series is a device which notifies the central control room or controller when
the valve reaches the set position.
2.2 Main Features and Functions
➢Non-explosion proof.
➢A wide range of uses with IP67 protection grade.
➢Various limit switch options available.
➢Polyester powder coating of YT-850 resist the corrosion process.
2.3 Label Description
•MODEL : Indicates the model number
•INGRESS PROTECTION : Indicates enclosure protection grade.
•SWITCH TYPE : Indicates the type and quantity of built-in switches.
•VOLTAGE : Indicates the available voltage and current.
※Precautions
Be careful not to apply volatile solvent (instant adhesive, acetone, WD-40, etc.) to the sticker
nameplate. Printed contents may be erased.

Limit Switch Box
YT-850 Series Product Manual
Ver. 1.16 5
2.4 Product Code
YT-850 1 2 3
1 Switch Type
M :
P :
Mechanical
Inductive proximity
2 Conduit Thread
1 :
3 :
4 :
1/2 NPT
G 1/2
M20x1.5P
3 Bracket Type
0 :
1 :
2 :
3 :
4 :
None
ST-1 (30*80, H20)
ST-2 (30*80, H30)
ST-3 (30*130, H30)
ST-4 (30*130, H50)
2.5 Product Specification
Model
YT-850M
YT-850P
Switch Type
Mechanical, 2 x SPDT
Inductive proximity sensor x 2
Model No. & Manufacturer
SS5GL
(Omron)
PSN17-5DNU
(Autonics, NPN type)
Switch Rating
AC
250V 3A
125V 5A
-
DC
250V 0.2A, 125V 0.4A,
30V 4A, 14V 5A, 8V 5A
12 ~ 24 VDC
Explosion Proof
Non-explosion proof
Enclosure Protection
IP 67
Ambient Temperature
-25 ~ 70°C (-13 ~ 158°F)
Conduit Entry
1/2 NPT or G 1/2 or M20x1.5P
Terminal
8 Points
Mounting Bracket Standard
NAMUR VDI/VDE 3845, ISO 5211
Housing Material
Aluminum
Painting
Polyester powder coating
Weight
880g (1.94 lb)
Tested under ambient temperature of 20°C, absolute pressure of 760mmHg, and humidity of 65%.
Please contact Rotork YTC Limited for detailed testing specification.

Limit Switch Box
YT-850 Series Product Manual
Ver. 1.16 6
2.6 Certifications
※All certifications below are posted on Rotork YTC Limited homepage (www.ytc.co.kr).
➢Electromagnetic Compatibility (EMC)
- EMC directive 2014/30/EC from April 2016
- EC Directive for CE conformity marking
2.7 Parts and Assembly

Limit Switch Box
YT-850 Series Product Manual
Ver. 1.16 7
2.8 Product Dimension

Limit Switch Box
YT-850 Series Product Manual
Ver. 1.16 8
2.9 Bracket Dimension

Limit Switch Box
YT-850 Series Product Manual
Ver. 1.16 9
3 Installation
3.1 Safety
When installing the unit, please ensure to read and follow safety instructions.
➢This Product is non-explosion proof and cannot be used in explosive areas.
➢Check the unit’s specification and ensure to use as specified.
➢Any input or supply pressures to valve, actuator, and / or to other related devices must be turned
off.
➢Use bypass valve or other supportive equipment to avoid entire system “shut down”.
3.2 Installation
➢Assemble limit switch box body with the bracket provided.
➢Align the main shaft of the limit switch box with the stem of the actuator. After the alignment,
tighten the bracket onto the actuator.

Limit Switch Box
YT-850 Series Product Manual
Ver. 1.16 10
4 Connections - Power
There are two conduit entries on the product. See “2.4 Product Code” for conduit entry threads.
4.1 Mechanical Type (2 x SPDT)
4.2 Inductive proximity sensor (x 2, NPN type)

Limit Switch Box
YT-850 Series Product Manual
Ver. 1.16 11
5 Adjustments
5.1 Upper Switch Adjustment
Push down upper LS cam and turn right or left to required position.
5.2 Lower Switch Adjustment
Pull up lower LS cam and turn right or left to required position.

Limit Switch Box
YT-850 Series Product Manual
Ver. 1.16 12
Manufacturer: Rotork YTC Limited
Address: 81, Hwanggeum-ro, 89 Beon-gil, Yangchon-eup, Gimpo-si, Gyeonggi-do, South Korea
Postal code: 10048
Tel: [phone]
Fax: [phone]
Email: [email protected]om
Homepage : http://www.ytc.co.kr
Issued : 2020-08-10
Copyright © Rotork YTC Limited. All Rights Reserved.