Siemens Milltronics RBSS User manual

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Speed sensors
Milltronics RBSS
Operating Instructions
07/2018
A5E45419003
-AA
Introduction
1
Description
2
Installing/mounting
3
Connection
4
Service and maintenance
5
Technical data
6
Dimension drawings
7
Certificates and support
A

Siemens AG
Division Process Industries and Drives
Postfach 48 48
90026 NÜRNBERG
GERMANY
Document order number: A5E45419003
Ⓟ
11/2018 Subject to change
Copyright © Siemens AG 2018.
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.

Milltronics RBSS
Operating Instructions, 07/2018, A5E45419003-AA 3
Table of contents
1 Introduction................................................................................................................................................ 5
1.1 Operating instructions scope ....................................................................................................5
1.2 Industrial use note.....................................................................................................................5
2 Description................................................................................................................................................. 7
2.1 Milltronics RBSS overview........................................................................................................7
3 Installing/mounting..................................................................................................................................... 9
3.1 Location ....................................................................................................................................9
3.2 Device without mounting bracket..............................................................................................9
3.3 Device with mounting bracket.................................................................................................11
3.4 Installation steps .....................................................................................................................11
3.4.1 Device without mounting bracket............................................................................................11
3.4.2 Device with mounting bracket.................................................................................................12
4 Connection .............................................................................................................................................. 13
5 Service and maintenance ........................................................................................................................ 15
5.1 Inspection................................................................................................................................15
5.2 Unit repair and excluded liability.............................................................................................15
5.3 Wheel and bearing repair .......................................................................................................15
6 Technical data ......................................................................................................................................... 19
6.1 Power......................................................................................................................................19
6.2 Temperature ...........................................................................................................................19
6.3 Input ........................................................................................................................................19
6.4 Output .....................................................................................................................................19
6.5 Cable.......................................................................................................................................20
6.6 Construction............................................................................................................................20
6.7 Approvals ................................................................................................................................20
7 Dimension drawings ................................................................................................................................ 23
7.1 RBSS ......................................................................................................................................23
7.2 Mounting bracket ....................................................................................................................24
A Certificates and support........................................................................................................................... 25
A.1 Certificates ..............................................................................................................................25
A.2 Technical support....................................................................................................................25

Milltronics RBSS
Operating Instructions, 07/2018, A5E45419003-AA 5
Introduction
1
1.1
Operating instructions scope
This instruction manual covers the installation, operation and maintenance of the RBSS
Speed Sensor Integrator.
1.2
Industrial use note
Note
•
The RBSS is to be used only in the manner outlined in this instruction manual.
•
This product is intended for use in industrial areas. Operation of this equipment in a
residential area may cause interference to several frequency based communications.

Introduction
1.2 Industrial use note
Milltronics RBSS
6Operating Instructions, 07/2018, A5E45419003-AA

Milltronics RBSS
Operating Instructions, 07/2018, A5E45419003-AA 7
Description
2
2.1
Milltronics RBSS overview
The Milltronics RBSS is a high-resolution, wheel-driven return belt speed sensor that
provides speed input to an integrator when used on a belt scale system.
The RBSS has a toothed gear, wheel, and trailing arm assembly, that rides along the return
belt. The gear and wheel rotate on a shaft fixed to the trailing arm. The internal magnetic
sensor detects the gear rotation and generates a signal proportional to the belt speed. The
output signal is transmitted via cable connection to the integrator to determine the rate of the
conveyed material.
The RBSS IS speed sensor contains a Pepperl + Fuchs, NAMUR rated, inductive proximity
switch, model number: NJ0.8-5GM-N. The proximity switch detects the gear rotation, and
transmits a signal to the integrator via the associated Switch Isolator.

Description
2.1 Milltronics RBSS overview
Milltronics RBSS
8Operating Instructions, 07/2018, A5E45419003-AA

Milltronics RBSS
Operating Instructions, 07/2018, A5E45419003-AA 9
Installing/mounting
3
3.1
Location
The RBSS should be located near the scale assembly to simplify wiring. The wheel should
ride on the return belt, either just before or just after a return belt idler.
3.2
Device without mounting bracket
The standard RBSS mounting attaches to the conveyor stringers via a customer-supplied
1 inch cross bar, cut and fastened to the stringers.

Installing/mounting
3.2 Device without mounting bracket
Milltronics RBSS
10 Operating Instructions, 07/2018, A5E45419003-AA
①Return belt travel
②Belt
③Stringer
④
RBSS
⑤
Cable
⑥
Washers, 2 places
(by customer)
⑦
24 mm (1 inch) dia.
cross bar (by customer)
⑧
Stringer
⑨
Wheel

Installing/mounting
3.3 Device with mounting bracket
Milltronics RBSS
Operating Instructions, 07/2018, A5E45419003-AA 11
3.3
Device with mounting bracket
The RBSS speed sensor attaches to a customer-supplied structural cross member via a
pivot and bracket assembly.
①Cross member (customer-supplied)
3.4
Installation steps
3.4.1
Device without mounting bracket
1. Measure the distance between the inside of the conveyor stringers, and then cut the
24 mm (1 inch) cross bar to the measured length.
2. Orient the return belt speed sensor. See RBSS without mounting bracket (Page 9).
3. Slide the cross bar through the hole on the end of the return belt speed sensor, and then
slide one 24 mm (1 inch) washer onto either end of the cross bar.
4. Position the assembly so the sensor wheel rides in the middle of the return belt.
5. Make sure there is 3 mm (1/8 inch) clearance between the sides of the sensor and the
washers, and then tack-weld the washers to the cross bar.
6. Tack-weld one end of the cross bar to one stringer.
7. Square the entire assembly with the return belt so the wheel will ride straight.
8. Tack-weld the other end of the cross bar to the opposite stringer, making sure the
assembly remains square with the belt.
9. Run the belt to check that the wheel is riding straight on the belt and is not pulling to
either side. If necessary, break one weld and pivot the entire assembly until the wheel
runs true.

Installing/mounting
3.4 Installation steps
Milltronics RBSS
12 Operating Instructions, 07/2018, A5E45419003-AA
①Stringer
②Tack-weld
③Washers (2 places)
④
Cross bar
⑤
Return belt
3.4.2
Device with mounting bracket
1. Position the RBSS mounting bracket against a structural cross member so the sensor
wheel rides in the middle of the return belt. See RBSS with mounting bracket (Page 11).
2. Drill and fasten or tack-weld the RBSS mounting bracket in place.
3. Position the RBSS between the bracket arms, and insert pin. Insert pin clip into pin.
4. Run the belt to check that the wheel is riding straight on the belt and is not pulling to
either side. If necessary, reposition the bracket until the wheel runs true.

Milltronics RBSS
Operating Instructions, 07/2018, A5E45419003-AA 13
Connection
4
Note
All wiring must be done in conjunction with approved conduit, boxes, and fittings and to
procedures in accordance with all governing regulations.
Ensure that there is sufficient slack in the cabling to allow the RBSS arm to pivot freely so
the wheel rides on the belt. Restriction of the arm can cause slippage or excessive contact
between the belt and the wheel.
RBSS CE
RBSS
Integrator
Red Excitation
White
Signal
Black Common
RBSS IS
RBSS IS
IS Switch Isolator Terminal
Integrator
Brown
1
Blue
3
7
Speed signal input
8
- excitation of load cells

Connection
Milltronics RBSS
14 Operating Instructions, 07/2018, A5E45419003-AA

Milltronics RBSS
Operating Instructions, 07/2018, A5E45419003-AA 15
Service and maintenance
5
5.1
Inspection
●Inspect the RBSS periodically to ensure that it can rotate freely about the pivot pin or
cross bar.
●Inspect the proximity switch area periodically and remove any material build-up.
5.2
Unit repair and excluded liability
All changes and repairs must be done by qualified personnel and applicable safety
regulations must be followed. Please note the following:
●The user is responsible for all changes and repairs made to the device.
●All new components must be provided by Siemens Milltronics Process Instruments Inc.
●Restrict repair to faulty components only.
●Do not re-use faulty components.
5.3
Wheel and bearing repair
Case 1
For tube housings with through holes for bolt and bushings of 22 mm (7/8 inch).
Parts required:
●
1
- wheel assembly, complete with sealed bearings and 60 tooth gear
●
2
- bushings
●
1
- M12 washer (optional - see ⑪on diagram below)
●
2
- stepped washers
●
1
- hex head bolt M12 x 1.75, 120 mm long
●
1
- locking hex nut M12 x 1.75

Service and maintenance
5.3 Wheel and bearing repair
Milltronics RBSS
16 Operating Instructions, 07/2018, A5E45419003-AA
Case 2
For tube housings with through holes for bolt of 13 mm (1/2 inch).
Parts required:
●
1
- wheel assembly, complete with sealed bearings and 60 tooth gear
●
2
- bushings
●
3
- M12 washers (1 of 3 washers is optional - see ⑪on diagram below)
●
1
- hex head bolt M12 x 1.75, 120 mm long
●
1
- locking nut M12 x 1.75
Note
Spare parts kit 7MH7723
-1FX contains parts for both Case 1 and Case 2. Extra M12
washers and stepped washers are provided.

Service and maintenance
5.3 Wheel and bearing repair
Milltronics RBSS
Operating Instructions, 07/2018, A5E45419003-AA 17
①
M12 flat washer (2)2)
②
Stepped washer (2)1)
③
Front view
④
Side view
⑤
M12 x 1.75 locking hex
nut
3)
⑥
22 mm (7/8 inch) hole1)
⑦
13 mm (½ inch) hole2)
⑧
60 tooth gear
⑨
Wheel assembly
⑩
Bushing (2)
⑪
Optional M12 washer:
-
Required of housing is impe-
rial 4
x 3/16 inch
square tubing
-
Not required if housing is
metric
100
x 100 x 5 mm square tub-
ing
1) Case 1
2) Case 2
3) Torque to 34 Nm (25 ft/lb)

Service and maintenance
5.3 Wheel and bearing repair
Milltronics RBSS
18 Operating Instructions, 07/2018, A5E45419003-AA

Milltronics RBSS
Operating Instructions, 07/2018, A5E45419003-AA 19
Technical data
6
6.1
Power
RBSS CE
4.5 ... 28 V DC, 16 mA max.
RBSS IS
5 ... 25 V DC from IS Switch Isolator
6.2
Temperature
RBSS CE -40 ... +110 °C (-40 ... +230 °F)
RBSS IS
-25 ... +100 °C (-14 ... +212 °F)
6.3
Input
Shaft rotation 2 ... 450 rpm, bi-directional
6.4
Output
60 pulses per revolution, 2 ... 450 Hz,
45.8 pulses/foot (150.4 pulses/meter)
RBSS CE
Open collector sinking output, 25 mA
RBSS IS
Load current, 0 ... 15 mA

Technical data
6.5 Cable
Milltronics RBSS
20 Operating Instructions, 07/2018, A5E45419003-AA
6.5
Cable
RBSS CE 3 m (10 ft), 3 conductor 22 AWG (0.324 mm2),
PVC shielded cable 300 m (1 000 ft) maximum
cable run
RBSS IS 2 m (6.5 ft), 2 conductor 26 AWG (0.129 mm2),
PVC covered cable
300 m (1 000 ft) maximum cable run to IS switch
isolator
300 m (1 000 ft) maximum cable run from IS
switch isolator and integrator
6.6
Construction
Trailing arm
Painted mild steel
Sensor wheel
127 mm (5 inch) diameter, polyurethane tread
6.7
Approvals
RBSS CE
CE
RBSS IS Uses CE, ATEX and CSA approved Pepperl +
Fuchs Proximity Switch and IS Switch Isolator
(See Switch and Isolator Approvals below.)