rotork YT-3700 User manual

SMART POSITIONER PRODUCT MANUAL
YT-3700 / 3750 / 3702
VERSION 1.26
.
YT-3700 YT-3750
YT-3702
Rotork YTC Limited

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YT-3700 / 3750 / 3702 Product Manual
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Contents
1Introduction.................................................................................................................................................6
1.1 General Information for the users.........................................................................................................6
1.2 Manufacturer Warranty.........................................................................................................................6
1.3 Explosion Proof Warning (Only for Intrinsic safety type positioners)....................................................7
2Product Description ...................................................................................................................................9
2.1 General.................................................................................................................................................9
2.2 Main Features and Functions ...............................................................................................................9
2.3 Label Description............................................................................................................................... 10
2.4 Product Code..................................................................................................................................... 15
2.4.1 YT-3700 / 3750 series follows suffix symbols as follows............................................................... 15
2.4.2 YT-3702 series follows suffix symbols as follows.......................................................................... 16
2.5 Product Specification......................................................................................................................... 17
2.5.1 YT-3700 / 3750 Specification......................................................................................................... 17
2.5.2 YT-3702 Specification.................................................................................................................... 18
2.6 Specification of Digital Input, Digital Output ...................................................................................... 19
2.7 Certifications...................................................................................................................................... 20
2.8 Parts and Assembly........................................................................................................................... 22
2.8.1 YT-3700 / 3750.............................................................................................................................. 22
2.8.2 YT-3702......................................................................................................................................... 24
2.9 Product Dimension ............................................................................................................................ 25
2.9.1 YT-3700......................................................................................................................................... 25
2.9.2 YT-3750......................................................................................................................................... 25
2.9.3 YT-3702......................................................................................................................................... 26
3Installation................................................................................................................................................ 27
3.1 Safety................................................................................................................................................. 27
3.2 Tools for installation........................................................................................................................... 27
3.3Linear positioner Installation.............................................................................................................. 28
3.3.1 Safety............................................................................................................................................. 28
3.3.2 Standard lever type positioner Installation Steps .......................................................................... 29
3.4 Rotary positioner Installation ............................................................................................................. 34
3.4.1 YT-3700R / 3750R Components ................................................................................................... 34
3.4.2 YT-3702R remote sensor components.......................................................................................... 35
3.4.3 Rotary Bracket Information (Only YT-3700R / 3750R).................................................................. 36
3.4.4 Rotary positioner Installation Steps............................................................................................... 37
4Connection - Air....................................................................................................................................... 38
4.1 Safety................................................................................................................................................. 38
4.2 Supply Pressure Condition................................................................................................................ 38
4.3 Piping Condition................................................................................................................................. 38
4.4 Connection –Piping with actuator..................................................................................................... 39

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4.4.1 Single acting actuator .................................................................................................................... 39
4.4.2 Double acting actuator................................................................................................................... 40
5Connection – Power ................................................................................................................................ 41
5.1 Safety................................................................................................................................................. 41
5.2 Connection......................................................................................................................................... 42
5.2.1 Standard Terminals ....................................................................................................................... 42
5.2.2 Terminals with micro-limit switch option (Only YT-3700 / 3750) ................................................... 44
5.2.3 Terminals with inductive proximity Limit Switch option (Only YT-3700 / 3750)............................. 45
5.3 Ground............................................................................................................................................... 45
6Adjustments ............................................................................................................................................. 46
6.1 Limit Switch Adjustment (Only YT-3700 / 3750)................................................................................ 46
6.2 A/M switch adjustment....................................................................................................................... 47
6.3 Orifice Installment.............................................................................................................................. 48
7Optional Sub-PCB Installment ............................................................................................................... 49
7.1 Installation steps................................................................................................................................ 49
8Maintenance ............................................................................................................................................. 51
8.1 Supply air........................................................................................................................................... 51
8.2 Seals.................................................................................................................................................. 51
9Auto Calibration and PCB Operation..................................................................................................... 52
9.1 Warning.............................................................................................................................................. 52
9.2 LCD display and buttons.................................................................................................................... 52
9.2.1 LCD display and symbols.............................................................................................................. 52
9.2.2 Button and function........................................................................................................................ 53
9.3 Menu levels........................................................................................................................................ 54
9.4 RUN Mode Monitor............................................................................................................................ 55
9.5 Configuration and Operation.............................................................................................................. 56
9.6 Calibration (CALIb) ............................................................................................................................ 60
9.6.1 Acting Type (SINGLE / dOUBLE).................................................................................................. 60
9.6.2 Auto Calibration 1 (AUTO 1).......................................................................................................... 61
9.6.3 Auto Calibration 2 (AUTO 2).......................................................................................................... 61
9.6.4 Travel Zero (TVL ZERO) and Travel end (TVL ENd).................................................................... 62
9.7 Manual Operation (MAN OPER)........................................................................................................ 63
9.7.1 Manual Operation by Set position (MAN SP) ................................................................................ 63
9.7.2 Manual Operation by Manipulator Value (MAN MV) ..................................................................... 64
9.8 Control Parameters (CTL PARM)...................................................................................................... 65
9.8.1 Dead Band (dEAdbANd)................................................................................................................ 65
9.8.2 Forward P parameter (KP UP) and reverse P parameter (KP dN)................................................ 66
9.8.3 Forward Integral time parameter (TI UP) and reverse Integral time parameter (TI dN)................ 66
9.8.4 Forward D parameter (Kd UP) and reverse D parameter (Kd dN)................................................ 67
9.8.5 GAP parameter (GAP)................................................................................................................... 67

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9.8.6 GAP P parameter (GP).................................................................................................................. 68
9.8.7 GAP I parameter (GI)..................................................................................................................... 68
9.8.8 GAP D parameter (Gd).................................................................................................................. 69
9.8.9 Auto Dead band Mode (AUTO db) ................................................................................................ 70
9.8.10 Performance Mode (PER STbL / NORM / FAST) ..................................................................... 70
9.9 Input Configuration (IN CFG)............................................................................................................. 71
9.9.1 Signal Direction (SIG NORM / REVS)........................................................................................... 71
9.9.2 Split Range Mode (SPLIT 4.20 / 4.12 / 12.20 / CSt)...................................................................... 72
9.9.3 Custom Split Range Zero (CST ZERO)......................................................................................... 72
9.9.4 Custom Split Range End (CST ENd)............................................................................................. 73
9.9.5 Valve Flow Characterization Curves (CHAR LIN / EQ / USER 5P / USER 21P).......................... 73
9.9.6 User Set Characterization 5 Points (USER 5P)............................................................................. 74
9.9.7 User Set Characterization 21 Points (USER 21P)......................................................................... 75
9.9.8 Tight Shut Open (TSHUT OP)....................................................................................................... 76
9.9.9 Tight Shut Close (TSHUT CL) ....................................................................................................... 77
9.9.10 Target Position Ramp Up Rate (RAMP UP) and Target Position Ramp Down Rate (RAMP dN)
78
9.9.11 Digital Input Function (dIF OFF / FCL / FOP / PSTA / PSTO) .................................................. 79
9.9.12 Digital Input Logic (dI LOGIC HI / Lo)........................................................................................ 80
9.10 Output Configuration (OUT CFG)...................................................................................................... 81
9.10.1 Position Transmitter Direction (PTM NORM / REVS)................................................................ 81
9.10.2 Position Transmitter Zero / End (PTM ZERO / ENd)................................................................. 82
9.10.3 HART Feedback Direction (HT NORM / REVS)........................................................................ 83
9.10.4 Back Calculation (bACKCAL oFF / on)...................................................................................... 84
9.10.5 Digital Output Function (dOF OFF / …) ..................................................................................... 85
9.10.6 Digital Output Logic (dO LOGIC HI / Lo) ................................................................................... 86
9.10.7 Analog Output Function (AOF OFF / …) ................................................................................... 87
9.10.8 Analog Output Logic (AO LOGIC Lo / HI).................................................................................. 88
9.11 Device Configuration (dEV CFG)....................................................................................................... 89
9.11.1 Action Setting (ACT REVS / dIR)............................................................................................... 89
9.11.2 Linear Interpolation (ITP oFF / on)............................................................................................. 90
9.11.3 Lock of Parameters (Write Protect, W UNLOCK / LOCK)......................................................... 90
9.11.4 Actual Position View Mode (View Mode, VI NORM / REVS) .................................................... 91
9.11.5 Polling address setting (POL AddR).......................................................................................... 91
9.11.6 Factory Reset (dEFAULT oFF / on)........................................................................................... 92
9.11.7 Positioner Self-Test (SELFTEST).............................................................................................. 93
9.12 Diagnosis Mode (dIAGNd)................................................................................................................. 94
9.12.1 Default Alarm Settings............................................................................................................... 94
9.12.2 Process Status (PS) .................................................................................................................. 96
9.12.3 Device Status (dS)..................................................................................................................... 97

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9.12.4 View Monitoring Counts (VI CNTS)........................................................................................... 99
9.12.5 Diagnostic Limit Configuration (LIMT CFG)............................................................................. 100
9.12.6 Reset Alarm Status (RST ALRM oFF / on).............................................................................. 101
9.12.7 View Event Log (EVT LOG)..................................................................................................... 102
9.12.8 Partial Stroke Test Record (View PST Result Record, PST RSLT)........................................ 103
9.12.9 PST Configuration (PST CFG) ................................................................................................ 104
9.12.10 Run PST (PST NOW).............................................................................................................. 105
9.12.11 Periodic PST Test (PST Schedule, PST SCHd oFF / on)....................................................... 106
9.13 Position information (INFO) ............................................................................................................. 106
9.14 Error codes during automatic calibration......................................................................................... 108
9.15 Status and Alarm Code.................................................................................................................... 109
10 Main Software Map .................................................................................................................................112
11 Intrinsically installation drawing...........................................................................................................113
11.1 FM certification................................................................................................................................. 113
11.2 CSA certification .............................................................................................................................. 114

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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.
➢Factory Mutual approved Intrinsically Safe and Non-Incendive units must be Installed Per
drwg SKC-190612.pdf
➢CSA approved Intrinsically Safe and Non-Incendive units must be Installed Per drwg SKC-
190613.pdf
➢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.
➢When the manual refers to “Valve Zero / Zero” means the final valve position upon pneumatic
pressure has been fully exhausted from positioner’s OUT1 port. For example, the valve zero
position may differ between linear direct and reverse actions. (DA/RA)
➢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.
➢Positioner is an accessory of the control valve, so please make sure to read the applicable
instruction manual of the control valve prior to installation and operation.
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. Date of shipment can be checked by providing the LOT NO. or SERIAL NO. to us.

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➢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.
➢For detailed warranty information, please contact the corresponding local Rotork YTC Limited
office or main office in South Korea.
1.3 Explosion Proof Warning (Only for Intrinsic safety type positioners)
Please ensure the unit is being used and installed in conformity with local, regional, and national
explosion proof within the proper safety barrier environment.
➢Refer to “2.7 Certifications”
➢Explosion proof type of cables and gaskets should be used, when explosion gases are present at
the installation site.
➢Positioner has 2 ports for power connection. Explosion proof type wires and packing should be
used. Blind plug is required when any port is not being used.
➢Ring terminal with surface area of more than 1.25 mm2 with M4 spring washer should be used to
connect the power.
➢For external ground terminal, ring terminal with surface area of more than 5.5 mm2 should be used.
➢Wiring in these applications shall utilize appropriate methods for Class I, Division 2 / Zone 2
➢Substitution of components may impair intrinsic safety.
➢Substitution of components may impair suitability for Class I, Division 2
(FM/CSA: Class I, Division1, Division 2)
➢WARNING –EXPLOSION HAZARD –Substitution of components may impair suitability for
Class I, Division 2.
➢“AVERTISSEMENT –RISQUE D'EXPLOSION –Remplacement des composants peut nuire à la
conformité de Classe I, Division 2”
➢EXPLOSION HAZARD. Do not connect or disconnect wiring unless all sources of power have
been removed or the area is known to be non-hazardous.
(French) RISQUE D'EXPLOSION. Ne pas raccorder ou débrancher le câblage à moins Toutes
les sources d'énergie ont été enlevées ou la zone est connue pour être non dangereux.
➢The enclosure of model YT-3700 / 3702 contains aluminum, which is considered to constitute a
potential risk of ignition when subjected to impact or friction. Care must be used during
installation in locating this equipment to prevent impact or friction
➢Some of the enclosure parts are made of non-metallic materials. To prevent the risk of
Electrostatic sparking, clean the enclosure only with a damp cloth.
➢The product must be installed in such a manner as to minimize the risk of impact or friction with
other metal surfaces.

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➢For Intrinsically Safe installations, the product must be connected to suitably rated intrinsically
safe equipment, and must be installed in accordance with applicable intrinsically safe installation
standards.
➢Tapped Exhaust option(AG of Product code) is used when it is required to vent away Group D,
Div/Group IIA, Zone gases to a safe area.
➢FM/CSA : Using gases other than air must be compatible with the YT-3700 series wetted parts.
➢FM/CSA : This equipment shall not be used in an atmosphere that may contain carbon disulfide
(CS2).
➢CSA : the range of environmental conditions for which the positioner is designed including the
following
1) Pollution Degree: “2”
2) Overvoltage Category: II
3) The maximum use altitude: 2000 m above sea level
➢CSA : the safety of any system incorporating the equipment is the responsibility of the assembler
of the system.
➢Special conditions for safe use :
The ambient temperature range deviates from the standard temperature range and amounts to:
Temperature class T5 / T100 °C: -40°C to +60 °C
Temperature class T6 / T85 °C: -40°C to +40 °C
Equipment must be protected from high risk of mechanical impact hazard and high electrostatic
charge hazards.

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2 Product Description
2.1 General
YT-3700 / 3750 / 3702 series Smart Valve Positioner accurately controls valve stroke in response to
an input signal of 4 ~ 20 mA from the controller. Built-in micro-processor optimizes the positioner’s
performance and provides unique functions such as Auto-Calibration, PID Control, and HART
Protocol Communications.
2.2 Main Features and Functions
➢LCD display enables users to monitor the positioner status.
➢User will easily understand the method of using 4 buttons because it work same in all versions of
firmware interfaces.
➢When unexpected situation like momentary blackout happens, our positioner boot-time only take
0.5 second and this can minimize the travel of valve which consequentially increase the safety of
system.
➢Positioner operates normally even there are sudden changes in supply pressure and / or high
vibration environment.
➢YT-3702 remote positioner is stronger on high temperature and vibration environment because it
is separated into remote sensor and positioner.
➢The method of Auto Calibration is very simple.
➢As an advantage of having very low air consumption, It could greatly reduce operating costs in
large-scale plants.
➢It is compatible with most of controllers.
➢Orifices can be installed even in the field to minimize the hunting occurrence and optimize
operating conditions.
➢Various information about positioner can be processed by HART communication.
➢"EDD and FDI files required for HART communication can be downloaded from our website
(www.ytc.co.kr) or FieldComm Group (www.fieldcommgroup.org). When using the FieldComm
Group website, please search for the Product Name on YT-3XXX."
➢Valve system becomes more stable by outputting analog feedback signal.
➢Different valve characteristics can be adjusted – Linear, Quick Open, Equal Percentage, and User
Set which user can make 5 or 21 points characterizations.
➢Tight Shut – Close and Shut - Open can be set.
➢PID parameters can be adjusted in the field without any additional communicator.
➢A/M switch can be used to direct supply air to the actuator or to manually operate the positioner
or valve without any signal.
➢Split range 4 ~ 12 mA or 12 ~ 20 mA can be set.
➢Operating temperature for remote sensor of YT-3702 is -40 ~ 120 °C.
➢Operating temperature for positioners is -30 ~ 85 °C or -40 ~ 85 °C (Please check certified
explosion proof temperature)

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➢Hand calibration function can set Zero point or End point manually.
➢It has IP66 and TYPE 4X(FM) protection grade.
➢Polyester powder coating resists the corrosion process. (except YT-3750).
➢Maintenance of the positioner is easy because of modularized inner structure.
➢SIL2 certified.(For more information, see SIL Safety Instruction on homepage)
➢Suitable for use with methane or natural gas supply pressure medium for FM/CSA (only A & AG
of Explosion proof of Product code)
➢The AG option in the product code has the tapped exhaust ports to carry the gas vented from the
positioner to a safe location when the positioner is installed indoors to use methane or natural gas
as a process medium.
2.3 Label Description
•MODEL : Indicates the model number and additional options.
•EXPLOSION PROOF : Indicates certified explosion proof grade.
•INGRESS PROTECTION : Indicates enclosure protection grade.
•INPUT SIGNAL : Indicates input signal range.
•OPERATING TEMP. : Indicates the allowable operating temperature.
•SUPPLY PRESSURE : Indicates the supply pressure range.
•SERIAL NUMBER : Indicates unique serial number.
•MONTH.YEAR : Indicates manufactured month and year.
•INTRINSIC SAFETY / NONINCENDIVE : Indicates intrinsic safety explosion proof grade.
•AMBIENT TEMP. : Indicates the allowable ambient temperature for explosion proof.
•Ui, Ii, Pi, Ci, Li : Indicates the allowable electrical data in the certificate.
ATEX: Ui = 28 V, Ii = 93 mA, Pi = 651 mW, Ci = 0.6 nF, Li = 10 μH
FM: Ui = xx V, Ii = xx mA, Pi = xxx mW, Ci = x.xx nF, Li = xx μH
You can also see the details in the certificate.
Fig. L-1: YT-3700 / 3702 Non-explosion proof

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Fig. L-2: YT-3700 / 3702 Non-explosion proof (EAC)
Fig. L-3: YT-3700 Intrinsic safety type (UKEX, ATEX, IECEx, KCs, NEPSI, PESO)
Fig. L-4: YT-3700 Intrinsic safety type (FM, CSA)

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Fig. L-5: YT-3700 Intrinsic safety type (EAC)
Fig. L-6: YT-3700 Intrinsic safety type (INMETRO)
Fig. L-7: YT-3700 Intrinsic safety type (CCC)

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Fig. L-8: YT-3750 Non-explosion proof
Fig. L-9: YT-3750 Intrinsic safety type (UKEX, ATEX, IECEx, KCs, NEPSI, PESO)
Fig. L-10: YT-3750 Intrinsic safety type (FM, CSA)

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Fig. L-11: YT-3750 Intrinsic safety type (EAC)
Fig. L-12: YT-3750 Intrinsic safety type (INMETRO)
Fig. L-13: YT-3750 Intrinsic safety type (CCC)

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2.4 Product Code
2.4.1 YT-3700 / 3750 series follows suffix symbols as follows.
YT-3700 / 3750 1 2 3 4 5 6 7 8
1 Motion Type
L :
R :
Linear (Positioner is attached the right yoke of actuator.)
Rotary
2 Acting type
S :
D :
Single
Double
3 Explosion Proof
1) N :
i :
A :
AG :
E :
Z :
Non-Explosion
ATEX, IECEx, KCs, NEPSI, INMETRO 2), UKEX, PESO :
Ex ia IIC T5/T6 Gb, Ex ia IIIC T100°C/T85°C Db, IP66
FM, CSA :
Class I, Division 1&2 Groups ABCD T5/T6
Class II, Division 1&2 Groups EFG T100℃/T85°C; Class III
Class I, Zone 0, AEx ia IIC T5/T6; Zone 21 AEx tb IIIC T100°C
/T85°C(FM)
Ex ia IIC T5/T6 Gb; Ex tb IIIC T100°C/T85°C Db IP6X(CSA)
FM, CSA + Tapped Exhaust
Intrinsic safety for EAC
Intrinsic safety for CCC
4 Lever Type
Linear
0 :
1 :
2 :
10 ~ 40 mm (Standard type)
20 ~ 100 mm (Standard type)
90 ~ 150 mm (Standard type)
Rotary
5 :
Namur
5 Conduit - Air
Connection Type
1 :
2 :
3 :
4 :
5 :
G 1/2 – Rc 1/4
G 1/2 – 1/4 NPT (YT-3750 is available for No. 2 ONLY)
G 1/2 – G 1/4
M20x1.5P – 1/4 NPT
1/2 NPT – 1/4 NPT
6 Communication
2 :
HART Communication
7 Option
0 :
1 :
4 :
5 :
None
+ 4 to 20 mA feedback
+ 4 to 20 mA feedback + Limit Switch Mech.(not available with NCS ) 3)
+ 4 to 20 mA feedback + Limit Switch Inductive Prox.
(not available with NCS ) 4)
※ DI/DO cannot be included at Limit Switch options
8 Operating Temp.
(Non-explosion proof) 5)
S :
L :
A :
-30 °C ~ 85 °C (-22 °F ~ 185 °F, except EAC)
-40 °C ~ 85 °C (-40 °F ~ 185 °F)
-55 °C ~ 85 °C (-67 °F ~ 185 °F, only EAC)
1) In case of EAC non-explosion type, put “EAC” in a purchase order.

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2) In case of INMETRO, put “INMETRO” in a purchase order.
3) This option is only available for “S”, “L” in 8 operating temp.
4) This option is only available for “S” in 8 operating temp.
3) 4) Limit Switch options are not available for NCS and different from software configurable Digital
Output that is triggered in synchronization with specific event or alarm.
5) This option is just the normal operating temperature of the product and is not related to explosion proof
temperature. See “2.7 Certificates” for explosion proof temperature.
2.4.2 YT-3702 series follows suffix symbols as follows.
YT-3702 1 2 3 4 5 6 7 8 9
1 Motion Type
L :
R :
Linear
Rotary
2 Acting type
S :
D :
Single
Double
3 Explosion Proof
1) N :
Non-Explosion
4 Lever Type
Linear
1 :
2 :
3 :
4 :
10 ~ 40 mm
20 ~ 70 mm
50 ~ 100 mm
100 ~ 150 mm
Rotary
5 :
Namur
5 Conduit –
Air Connection Type
1 :
2 :
3 :
4 :
5 :
G 1/2 – Rc 1/4
G 1/2 – 1/4 NPT
G 1/2 – G 1/4
M20x1.5P(Adapter type) – 1/4 NPT
1/2 NPT(Adapter type) – 1/4 NPT
6 Communication
2 :
+ HART Communication
7 Option
0 :
1 :
None
+ 4 to 20 mA feedback
8 Operating Temp.
(Non-explosion proof)
S :
L :
A :
-30 ~ 85 °C (-22 ~ 185 °F, except EAC)
-40 ~ 85 °C (-40 ~ 185 °F)
-55 ~ 85 °C (-67 ~ 185 °F, only EAC)
9 Cable Length 2)
1 :
2 :
3 :
4 :
5m
10m
15m
20m1
1) In case of EAC, put “EAC” in a purchase order.

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2) Maximum cable length is 20m.
2.5 Product Specification
2.5.1 YT-3700 / 3750 Specification
Model
YT-3700
YT-3750
Housing Material
Aluminum
Stainless Steel 316
Motion Type
Linear
Rotary
Linear
Rotary
Acting Type
Single / Double
Input Signal
4 ~ 20 mA DC
Minimum Current Signal
3.8 mA
Supply Pressure
0.14 ~ 0.7 MPa (1.4 ~ 7 bar)
Stroke
10 ~ 150 mm
55 ~ 110°
10 ~ 150 mm
55 ~ 110°
Impedance
Max. 500 Ω @ 20 mA DC
Air Connection
Rc 1/4 or 1/4 NPT or G 1/4
1/4 NPT
Gauge Connection
Rc 1/8 or 1/8 NPT
1/8 NPT
Conduit Entry
G 1/2 or 1/2 NPT or M20x1.5P
G 1/2
Tapped Exhaust
(Only AG option of Product code)
1/4 NPT
Ingress Protection
IP66, Type 4X(FM)
Explosion Proof
1. Non-Explosion
2. ATEX, IECEx, KCs, NEPSI, EAC, INMETRO, CCC, UKEX, PESO :
Ex ia IIC T5/T6 Gb, Ex ia IIIC T100°C /T85°C Db, IP66
3. FM & CSA:
Class I, Division 1&2 Groups ABCD T5/T6
Class II, Division 1&2 Groups EFG T100°C/T85°C; Class III
Class I, Zone 0, AEx ia IIC T5/T6; Zone 21 AEx tb IIIC T100°C
/T85°C(FM)
Ex ia IIC T5/T6 Gb; Ex tb IIIC T100°C/T85°C Db IP6X(CSA)
Operating
Temperature
Standard Type
-30 ~ 85 °C (-22 ~ 185 °F)
Inductive proximity limit switch internal type : -25 ~ 85 °C (-13 ~
185 °F) Except EAC
Low Temp. Type
-40 ~ 85 °C (-40 ~ 185 °F)
Arctic Temp. Type
-55 ~ 85 °C (-67 ~ 185 °F, only EAC)
Ambient Temperature
Of Explosion Proof
T5
-40 ~ 60 °C (-40 ~ 140 °F)
EAC : -55 ~ 60 °C (-67 ~ 140 °F)
T6
-40 ~ 40 °C (-40 ~ 104 °F)
EAC : -55 ~ 40 °C (-67 ~ 104 °F)
Linearity
± 0.5 % F.S.
Hysteresis
± 0.5 % F.S.
Sensitivity
± 0.2 % F.S.
Repeatability
± 0.3 % F.S.
Flow Capacity
70 LPM (Sup. = 0.14 MPa)

Smart Positioner
YT-3700 / 3750 / 3702 Product Manual
Ver. 1.26 18
Air Consumption
Below 2 LPM (Sup. = 0.14 MPa @ idle)
Output Characteristic
Linear, Quick Open, EQ%, User Set
Vibration
No Resonance up to 100 Hz @ 6 G
Humidity
5 ~ 95 % RH @ 40 °C
Communication
HART Communication (HART 7)
Feedback Signal (Option)
4 ~ 20 mA (DC 9 ~ 28 V)
Digital In/Out
Detail spec. refer to 2.6.
※N/A at Limit switch options.
Weight
2 kg (4.4 lb)
5.1 kg (11.2 lb)
Painting
Polyester Powder Coating
-
Tested under ambient temperature of 20 °C, absolute pressure of 760 mmHg, and humidity of 65 %.
Please contact Rotork YTC Limited for detailed testing specification.
2.5.2 YT-3702 Specification
Model
YT-3702
Housing Material
Aluminum
Motion Type
Linear
Rotary
Acting Type
Single / Double
Input Signal
4 ~ 20 mA DC
Minimum Current Signal
3.8 mA
Supply Pressure
0.14 ~ 0.7 MPa (1.4 ~ 7 bar)
Stroke
10 ~ 150 mm
55 ~ 110°
Impedance
Max. 500 Ω @ 20 mA DC
Air Connection
Rc 1/4 or 1/4 NPT or G 1/4
Gauge Connection
Rc 1/8 or 1/8 NPT
Conduit Entry
G 1/2 or 1/2 NPT or M20x1.5P
Ingress
Protection
Positioner module
IP66
Feedback sensor
IP66
Explosion Proof
Non-Explosion
Operating
Temperature
Sensor
-55 ~ 120 °C (-67 ~ 248 °F)
Body
Standard
-30 ~ 85 °C (-22 ~ 185 °F, except EAC)
Low temp.
-40 ~ 85 °C (-40 ~ 185 °F)
Arctic temp.
-55 ~ 85 °C (-67 ~ 185 °F, only EAC)
Linearity
± 0.5 % F.S.
Hysteresis
± 0.5 % F.S.
Sensitivity
± 0.2 % F.S
Repeatability
± 0.3 % F.S.
Flow Capacity
70 LPM (Sup. = 0.14 MPa)
Air Consumption
Below 2 LPM (Sup. = 0.14 MPa @ idle)

Smart Positioner
YT-3700 / 3750 / 3702 Product Manual
Ver. 1.26 19
Output Characteristic
Linear, Quick Open, EQ%, User Set
Vibration
No Resonance up to 100 Hz @ 6 G
Humidity
5 ~ 95 % RH @ 40 °C
Communication
HART Communication (HART 7)
Feedback Signal (Option)
4 ~ 20 mA (DC 9 ~ 28 V)
Digital In/Out
Detail spec. refer to 2.6
Weight
Positioner
2.5 kg (5.5 lb)
Remote Sensor
0.6 kg (1.2 lb)
Cable(5M)
0.6 kg (1.3 lb)
Painting
Polyester Powder Coating
Tested under ambient temperature of 20 °C, absolute pressure of 760 mmHg, and humidity of 65 %.
Please contact Rotork YTC Limited for detailed testing specification.
2.6 Specification of Digital Input, Digital Output
1) Digital Input
•Supply voltage : 0 ~ 5 V DC → Logical switching state "0"
10 ~ 28 V DC → Logical switching state "1"
•Current Max. 4mA
2) Digital Output
•Supply voltage 5 ~ 28 V DC
•Current < 1 mA, Switching state logical "0"
•Current > 2.2 mA, Switching state logical "1"

Smart Positioner
YT-3700 / 3750 / 3702 Product Manual
Ver. 1.26 20
2.7 Certifications
※ All certifications below are posted on Rotork YTC Limited homepage(www.ytc.co.kr).
➢KCs (Korea)
Type : Intrinsic safety
Rating : Ex ia IIC T6/T5, Ex ia IIIC T85°C/T100°C
Certification No. : 19-KA2BO-0874X / 19-KA2BO-0877X (YT-3700 gas / dust)
19-KA2BO-0867X / 19-KA2BO-0878X {YT-3700+LS(Dry contact) gas / dust}
19-KA2BO-0861X / 19-KA2BO-0879X {YT-3700+LS(Non-contact) gas / dust}
19-KA2BO-0862X / 19-KA2BO-0880X (YT-3750 gas / dust)
19-KA2BO-0863X / 19-KA2BO-0882X {YT-3750+LS(Dry contact) gas / dust}
19-KA2BO-0860X / 19-KA2BO-0881X {YT-37500+LS(Non-contact) gas / dust}
Ambient temperature : -40 ~ +40°C (T6/T85°C) / -40 ~ +60°C (T5/T100°C)
➢ATEX
Type : Intrinsic safety
Rating : II 2G Ex ia IIC T5/T6 Gb, II 2D Ex ia IIIC T100°C/T85°C Db, IP6X
Certification No. : EPS 19 ATEX 1 145 X
Ambient temperature : -40 ~ +60°C (T5), -40 ~ +40°C (T6)
➢IECEx
Type : Intrinsic safety
Rating : Ex II 2G Ex ia IIC T5/T6 Gb, Ex II 2D Ex ia IIIC T100°C/T85°C Db, IP6X
Certification No. : IECEx EPS 19.0069X
Ambient temperature : -40 ~ +60°C (T5/T100°C), -40 ~ +40°C (T6/T85°C)
➢NEPSI (China)
Type : Intrinsic safety
Rating : Ex ia IIC T5/T6 Gb, Ex iaD 21 T100/T85
Certification No. : GYJ19.1360X
Ambient temperature : -40 ~ +60°C (T5/T100°C), -40 ~ +40°C (T6/T85°C)
➢EAC (TRCU, Russia + Kazakhstan + Belarus)
Type : Intrinsic safety
Rating : 1Ex ia IIC T6 ... T5 Gb X, Ex ia IIIC T85°C ... T100°C Db X
0Ex ia IIC T6 ... T5 Ga X, Ex ia IIIC T85°C ... T100°C Da X
Certification No. : RU C-KR.AM02.B.00306/20
Ambient temperature : -55 ~ +60°C (T5/T100°C), -55 ~ +40°C (T6/T85°C)
➢FM
Rating : Class I, Div 1, Groups ABCD
Class I, Zone 0 AEx ia IIC; Zone 21 AEx tb IIIC T100°C/T85°C
Class II/III, Div 1, Groups EFG
Class I, II, III, Div 2, Groups ABCDEFG
Type 4X, IP66
Certificate No.: FM20US0020X
Ambient temperature : -40 to +60°C(T5), -40 to +40°C(T6)