Siemens SITRANS WS300 User manual

SITRANS
Speed sensors
SITRANS WS300
Operating Instructions
7MH7177-......(WS300)
04/2021
A5E45050935
-AC
Introduction
1
Description
2
Installing/mounting
3
Connecting
4
Service and maintenance
5
Technical specifications
6
Product documentation and
support
7

Siemens AG
Digital Industries
Postfach 48 48
90026 NÜRNBERG
GERMANY
Document order number: A5E45050935
Ⓟ
04/2021 Subject to change
Copyright © Siemens AG 2021.
All rights reserved
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication
may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.

SITRANS WS300
Operating Instructions, 04/2021, A5E45050935-AC 3
Table of contents
1 Introduction ........................................................................................................................................... 5
1.1 Operating instructions scope................................................................................................ 5
1.2 Purpose of this documentation ............................................................................................ 5
1.3 Industrial Use Note .............................................................................................................. 5
2 Description............................................................................................................................................. 6
2.1 SITRANS WS300 speed sensor overview ............................................................................... 6
3 Installing/mounting ............................................................................................................................... 7
3.1 Installation note................................................................................................................... 7
3.2 Dimension drawings ............................................................................................................ 7
3.3 Mounting ............................................................................................................................ 8
3.4 Mounting to a tail pulley...................................................................................................... 9
3.5 Mounting to a bend or snub pulley..................................................................................... 11
3.6 Mounting using optional threaded shaft coupling............................................................... 13
3.7 General installation steps................................................................................................... 14
3.8 Hazardous area installations............................................................................................... 16
3.8.1 Product nameplates ........................................................................................................... 16
3.8.2 Instructions specific to hazardous area installation ............................................................. 18
4 Connecting .......................................................................................................................................... 20
4.1 Interconnection ................................................................................................................. 20
4.2 Terminals (standard version).............................................................................................. 21
4.2.1 Terminal connections to Siemens Milltronics integrators..................................................... 22
4.2.2 Terminal connections to SIWAREX FTC integrator ............................................................... 22
4.2.3 Terminal connections to WL241 ......................................................................................... 22
4.3 Terminals (IS version) ........................................................................................................ 23
4.3.1 Terminal connections to Siemens Milltronics integrators..................................................... 23
4.3.2 Terminal connections to SIWAREX FTC integrator ............................................................... 23
4.3.3 Terminal connections to WP241......................................................................................... 24
5 Service and maintenance .................................................................................................................... 25
5.1 Inspection.......................................................................................................................... 25
5.2 Recommended spare parts................................................................................................. 25

Table of contents
SITRANS WS300
4Operating Instructions, 04/2021, A5E45050935-AC
6 Technical specifications....................................................................................................................... 26
6.1 Power................................................................................................................................ 26
6.2 Ambient temperature ........................................................................................................ 26
6.3 Inputs................................................................................................................................ 26
6.4 Outputs............................................................................................................................. 26
6.5 Construction...................................................................................................................... 27
6.6 Approvals .......................................................................................................................... 27
7 Product documentation and support .................................................................................................. 30
7.1 Product documentation ..................................................................................................... 30
7.2 Technical support .............................................................................................................. 31
Index.................................................................................................................................................... 32

SITRANS WS300
5Operating Instructions, 04/2021, A5E45050935-AC
Introduction
1
1.1 Operating instructions scope
This instruction manual covers the installation, operation, and maintenance of the WS300
speed sensor.
1.2 Purpose of this documentation
We strongly recommend reading this manual, and any manual for a product used in
conjunction with the WS300 (such as a belt scale integrator), for proper installation and
operation of any component of the weighing system. Adhering to the installation and
operating procedures ensures a quick, trouble-free installation and allows for the maximum
accuracy and reliability of your weighing system.
1.3 Industrial Use Note
Note
This product is intended for use in industrial areas.
In a domestic environment this device may cause radio interference.

SITRANS WS300
6Operating Instructions, 04/2021, A5E45050935-AC
Description
2
2.1 SITRANS WS300 speed sensor overview
SITRANS WS300 speed sensor is a low- to high-resolution shaft driven speed sensor. It
measures the shaft’s rotation by sending pulses to the integrator. The WS300 is certified for
use in hazardous and non-hazardous locations.
This small, light-weight speed sensor features:
•Optional resolutions for accurate measurement over a range of belt speeds
•Long bearing life
•Corrosion resistance
Pulses are generated for each rotation of the WS300 shaft. These pulses are typically fed into
a Milltronics belt scale integrator. The integrator interprets the pulses and uses them in the
calculation of belt speed, flow rate, and material totalization.
The WS300 works with the following integrators:
•Milltronics BW100
•Milltronics BW500
•SIWAREX FTC
•SIWAREX WP241
•SIWAREX WT241
•Competitive integrators - consult your local Siemens representative
The WS300 sensors can also be used with older model Siemens integrators:
•Compuscale
•Compuscale II
•Compuscale IIA
•Compuscale III
•Compu-M
For further information about Siemens products, go to
www.siemens.com/processautomation (www.siemens.com/processautomation)

SITRANS WS300
7Operating Instructions, 04/2021, A5E45050935-AC
Installing/mounting
3
3.1 Installation note
Note
Installation shall be performed only by qualified personnel in accordance with local governing
regulations.
3.2 Dimension drawings
Dimensions in mm (inch)
①Shaft ø: 15.9 mm (5/8 inch)
②Rod ø: 8.0 mm (5/16 inch)
③½" NPT conduit entrance (optional M20 adapter available)

Installing/mounting
3.3 Mounting
SITRANS WS300
8Operating Instructions, 04/2021, A5E45050935-AC
Dimensions in mm (inch)
①½" NPT conduit entrance (optional M20 adapter available)
3.3 Mounting
The input shaft on the WS300 is coupled to the rotating shaft on a belt driven pulley and is
not externally supported. The units arresting rod stops it from rotating with the pulley shaft
and can be fitted with a spring to soften sudden speed changes.
CAUTION
Proper attachment of the arresting rod
The arresting rod should only be solidly attached to the WS300. Fixing the rod at both ends
will apply binding forces and cause the unit’s bearings to wear prematurely.
When mounting, make sure the unit and the pulley shaft are concentric to avoid stresses on
the units bearings.
For preferred mounting locations, refer to the associated belt scale or weigh feeder
instruction manual.
For shafts that do not have enough material protruding to use a set screw, or that cannot be
removed for modification, a threaded shaft coupling can be used.

Installing/mounting
3.4 Mounting to a tail pulley
SITRANS WS300
Operating Instructions, 04/2021, A5E45050935-AC 9
3.4 Mounting to a tail pulley
Dimension in mm (inch)
①Angle bracket slotted for arrestor rod
③Belt
②Tension spring (supplied)
④Flexible conduit

Installing/mounting
3.4 Mounting to a tail pulley
SITRANS WS300
10 Operating Instructions, 04/2021, A5E45050935-AC
Dimensions in mm (inch)
①Angle bracket slotted for arrestor rod
③Arrestor rod (cut to suit)
②Tension spring (supplied)
④Flexible conduit
Note
•
Distance (d) is the take up travel on the tail pulley.
•
When adjusting the belt take up, ensure there is play on the arrestor rod. If the arrestor
rod is pushed against the end of its travel slot, premature wear may result on the bearing.

Installing/mounting
3.5 Mounting to a bend or snub pulley
SITRANS WS300
Operating Instructions, 04/2021, A5E45050935-AC 11
3.5 Mounting to a bend or snub pulley
①Belt direction
③Tension spring (supplied)
②Belt
④Stringer
⑤Flexible conduit

Installing/mounting
3.5 Mounting to a bend or snub pulley
SITRANS WS300
12 Operating Instructions, 04/2021, A5E45050935-AC
Dimensions in mm (inch)
①Bend or snub pulley
④Belt direction
⑦Flexible conduit
②3/8" drilled hole for arrestor rod
⑤Tension spring
⑧Pulley bearing
③Stringer
⑥Arrestor rod (cut to suit)
Note
When mounting to a bend or snub pulley only a 3/8
inch (10 mm) drilled hole is required for
the arrestor rod.

Installing/mounting
3.6 Mounting using optional threaded shaft coupling
SITRANS WS300
Operating Instructions, 04/2021, A5E45050935-AC 13
3.6 Mounting using optional threaded shaft coupling
Dimensions in mm (inch)
①M12 x 1.75
③M12 x 1.75 [use adhesive when installing
threaded shaft coupling (e.g. Loctite)]
②Set screw
Note
All other installation instructions apply. See General installation steps (Page 14).

Installing/mounting
3.7 General installation steps
SITRANS WS300
14 Operating Instructions, 04/2021, A5E45050935-AC
3.7 General installation steps
1. Drill out pulley shaft to a depth of 64 mm (2.5 inch) concentric to its centerline.
WARNING
Remain within specified tolerances
Exercise caution and remain within specified tolerances.
2. Drill out and thread the set screw hole.
Dimensions in mm (inch)
①M8 x 1.25 (5/16-18 UNC) set screw (by customer)
②16.00 mm (0.630 inch) dia., 16.07 mm (0.633 inch)
3. Attach angle iron bracket to work with the arrestor rod (if mounting on a tail pulley).
4. Cut the arrestor rod to a suitable length.

Installing/mounting
3.7 General installation steps
SITRANS WS300
Operating Instructions, 04/2021, A5E45050935-AC 15
5. Insert the WS300 shaft into the pulley shaft and lock with set screw on flat of shaft.
Dimensions in mm (inch)
①Example slot for arrestor rod when mounted to tail pulley - use drilled hole for snub or
bend pulley.
②127 mm (5 inch) approx.
③Secure with bolt or post
④Angle iron bracket or conveyor stringer web
⑤Tension spring
6. Attach spring to arresting rod and frame.
7. Encase wiring in flexible conduit to allow unit to float.
8. Wire the WS300 to the integrator. See Terminal Connections to Siemens Milltronics
Integrators (Page 22), or Terminal Connections to SIWAREX FTC Integrator (Page 22).
WARNING
Proper attachment of the arresting rod
The arresting rod should only be solidly attached to the WS300. Fixing the rod at both ends
will apply binding forces and cause the unit’s bearings to wear prematurely.

Installing/mounting
3.8 Hazardous area installations
SITRANS WS300
16 Operating Instructions, 04/2021, A5E45050935-AC
3.8 Hazardous area installations
3.8.1 Product nameplates
Note
The nameplate shown is a typical example. Please check the nameplate on your device for
your specific device configuration.

Installing/mounting
3.8 Hazardous area installations
SITRANS WS300
Operating Instructions, 04/2021, A5E45050935-AC 17

Installing/mounting
3.8 Hazardous area installations
SITRANS WS300
18 Operating Instructions, 04/2021, A5E45050935-AC
3.8.2 Instructions specific to hazardous area installation
(Reference European ATEX Directive 94/9/EC, Annex II, 1/0/6)
Note
The enclosure shall be grounded to provide a discharge path for any electrostatic charges.
The equipment shall be installed as per the installation drawing A5E03436733. This
assessment does not cover any additional mechanical parts (e.g. conveyor belt etc.
) that are
added during installation. Proper maintenance is required to ensure that no dust shall
accumulate on the surface of the WS300 (I.S). The maximum speed of the sensor shaft shall
not exceed 1000 RPM (0785 m/sec). Regular inspection of the shaft se
al and cover gasket is
required. The seals must maintain a rating of IP6X.
The following instructions apply to equipment covered by certificate numbers
Sira 06ATEX9303X, Sira 17ATEX2267X:
1. For use and assembly, refer to the main instructions.
2. The equipment is certified for use as Category 2D equipment per Sira 06ATEX9303X;
Category M1, 1G, 1D per Sira 17ATEX2267X.
3. Per certificate Sira 17ATEX2267X, the equipment may be used with flammable gases and
vapors with apparatus group I, IIC, IIB, IIA, IIIC, IIIB, IIIA and temperature classes T1, T2, T3
and T4. It may also be used with flammable dusts with apparatus group IIIC, IIIB, IIIA and a
temperature class of 135°C.
4. Per certificate Sira 06ATEX9303X, the equipment has a degree of ingress protection of IP6X
and a temperature class of T70 °C and may be used with flammable dusts.
5. The equipment is certified for use in an ambient temperature range of –40°C to +55°C
6. The equipment has not been assessed as a safety related device (as referred to by Directive
94/9/EC Annex II, clause 1.5).
7. Installation and inspection of this equipment shall be carried out by suitably trained
personnel in accordance with the applicable code of practice.
8. Repair of this equipment shall be carried out by suitably trained personnel in accordance
with the applicable code of practice.
9. Components to be incorporated into or used as replacements in the equipment shall be
fitted by suitably trained personnel in accordance with the manufacturer's documentation.
10.If the equipment is likely to come into contact with aggressive substances, then it is the
responsibility of the user to take suitable precautions that prevent it from being adversely
affected, thus ensuring that the type of protection is not compromised.
–Aggressive substances: for example, acidic liquids or gases that may attack metals or
solvents that may affect polymeric materials.
–Suitable precautions: for example, regular checks as part of routine inspections or
establishing from the materials data sheet that it is resistant to specific chemicals.
11.Product marking shall include the warning: Do not open when an explosive dust
atmosphere is present.

Installing/mounting
3.8 Hazardous area installations
SITRANS WS300
Operating Instructions, 04/2021, A5E45050935-AC 19
Special Conditions for Safe Use
The 'X' suffix to the certificate number relates to the following special condition(s) for safe
use:
Per Sira 17ATEX2267X
•The enclosure shall be grounded to provide a discharge path for any electrostatic charges.
•The equipment shall be installed as per the installation drawing A5E03436733.
•This assessment does not cover any additional mechanical parts (e.g., conveyor belt etc)
that are added during installation.
•Proper maintenance is required to ensure that no dust shall accumulate on the surface of
the WS300 IS.
•The maximum speed of the sensor shaft shall not exceed 1000 RPM.
•Regular inspection of the shaft seal and cover gasket is required. The seals must maintain
a rating of IP6X.
•When installed in the hazardous area with type protection ‘ia’, without the optional
flameproof enclosure, the equipment shall be installed in a suitably-certified enclosure
providing a minimum ingress protection of IP54, which provides suitable control of
condensation and/or airborne pollution. The installer shall ensure that the maximum
ambient temperature of the equipment when installed is not exceeded.
•Cable or conduit entries shall comply with the requirements of the European Directive
94/9/EC for Group II, Category 2D and maintain the overall IP rating of the enclosure.

SITRANS WS300
20 Operating Instructions, 04/2021, A5E45050935-AC
Connecting
4
4.1 Interconnection
Note
Installation shall be performed only by qualified personnel and in accordance with local
governing regulations.
Interconnection between the standard WS300 unit and the integrator should be made with
three-wire shielded, 0.82 mm2 (18 AWG) cable. To connect the WS300 IS unit to the switch
isolator, use two-wire shielded 0.324 mm2(22 AWG) cable. Use the same cable to connect
the switch isolator to the integrator.
For both units, ground the shield at the integrator end ONLY. Connect shield to appropriate
terminal at the integrator.
Note
•
Flexible conduit is recommended so that excess stress is not applied to the shaft bearings.
Use appropriate conduit and conduit fittings or cable glands to maintain NEMA or IP
rating.
•
Use appropriate conduit and conduit fittings or cable glands to maintain NEMA or IP
rating.
Standard Version