Speed Sensor Installation Manual

Introduction

The speed sensor monitors belt speed. It is directly coupled to a rotating shaft, such as a bend pulley, which drives a signal generator. The speed sensor outputs a signal at a frequency directly proportional to the shaft speed. It is typically installed on a non-driven pulley of a belt conveyor for detecting belt speed.

Manuals and additional resources are available from Rice Lake Weighing Systems at www.ricelake.com/manuals. Warranty information can be found on the website at www.ricelake.com/warranties.

1.1 Safety

Safety Signal Definitions:

• DANGER: Indicates an imminently hazardous situation that, if not avoided, will result in death or serious injury. Includes hazards that are exposed when guards are removed.
• WARNING: Indicates a potentially hazardous situation that, if not avoided, could result in serious injury or death. Includes hazards that are exposed when guards are removed.
• CAUTION: Indicates a potentially hazardous situation that, if not avoided, could result in minor or moderate injury.
• IMPORTANT: Indicates information about procedures that, if not observed, could result in damage to equipment or corruption to and loss of data.

General Safety

Do not operate or work on this equipment unless this manual has been read and all instructions are understood. Failure to follow the instructions or heed the warnings could result in injury or death. Contact any Rice Lake Weighing Systems dealer for replacement manuals.

WARNING: Failure to heed could result in serious injury or death.

Some procedures described in this manual require work inside the indicator enclosure. These procedures are to be performed by qualified service personnel only.

Take all necessary safety precautions when installing the speed sensor, including wearing safety shoes, protective eye wear, and using the proper tools.

• Do not allow minors (children) or inexperienced persons to operate this unit.
• Do not operate without all shields and guards in place.
• Do not place fingers into slots or possible pinch points.
• Do not use any load bearing component that is worn beyond 5% of the original dimension.
• Do not use this product if any of the components are cracked.
• Do not exceed the rated load limit of the unit.
• Do not make alterations or modifications to the unit.
• Do not remove or obscure warning labels.
• Keep hands, feet and loose clothing away from moving parts.

1.2 Technical Specifications

• Ambient Temperature: -30° to 80° C (-22° to 176° F)
• Enclosure: IP65
• Detecting Speed Range: 20 to 280 rpm
• Conduit Holes: 1/2"-14 NPT (M25x1.5)

1.3 Speed Sensor Dimensions

The speed sensor has a main body with dimensions approximately 176 mm (6.93 in) in length and 154 mm (6.06 in) in height. A mounting bracket extends from the side, with a width of approximately 31 mm (1.20 in). The sensor has a circular cross-section with a diameter of approximately 16 mm (0.63 in) at one end, and a total length including the bracket and housing of approximately 406 mm (15.98 in). The overall width is approximately 154 mm (6.06 in) and height approximately 77 mm (3.03 in).

1.4 Speed Sensor Wiring Diagram

Two wiring styles are shown:

Generator Style Speed Sensor

Connects to an INTEGRATOR/TOTALIZER. Pins are labeled SHIELD, PULSEIN, and GND. It is specified NOT TO CONNECT SHIELD AT SPEED SENSOR END.

Encoder Style Speed Sensor

Connects to an INTEGRATOR/TOTALIZER. Pins are labeled SIGNAL, COMMON, and V+. The INTEGRATOR/TOTALIZER side shows connections for PULSEIN, GND, +24VDC, and V+. It is specified NOT TO CONNECT SHIELD AT SPEED SENSOR END.

1.5 920i Pulse Input

This section shows a diagram of a printed circuit board labeled J1, with connections for +12V, GND, and PULSE IN.

1.6 882D Pulse Input

Use the J13 connector on the 882D CPU board for pulse input from the speed sensor. The connector has two levels of pins. Pins 4, 5, and 6 form the primary pulse input channel (Input 1). Pins 1, 2, and 3 form the secondary pulse input channel (Input 2).

2.0 Installation

Install the speed sensor using the following instructions.

WARNING: Ensure that the belt scale is turned off and all power to the unit has been removed prior to starting the installation of the speed sensor.

Installation Diagram (Figure 2-1)

The diagram shows the speed sensor mounted to a conveyor frame. The sensor is attached via an anti-rotation arm, which is tensioned by a spring connected to a rooted support. The sensor is coupled to a bend pulley. The diagram indicates a minimum belt wrap angle of >30 degrees on the bend pulley and shows a coupling bush. It also illustrates the 'Side A View' and an 'Enlarged' view of the coupling mechanism.

Installation Steps:

1. Locate the center of the bend pulley shaft and punch mark.
2. Drill a 1/4" (6 mm) pilot hole.
3. Use a 17/32" (13.5 mm) bit to drill the center of the pulley shaft to a minimum depth of 1" (26 mm).
4. Tap the drilled hole with a 5/8-11 tap (M16x2).
5. Install (thread) the supplied coupling into the tapped hole, using thread-lock adhesive if desired, and tighten.
6. Use supplied bolts, washers, and nuts to connect the anti-rotation arm to the speed sensor.
7. Weld a support plate on the conveyor frame at a suitable position.
8. Place the anti-rotation arm against the support plate.
9. Use the supplied spring to tension the anti-rotation arm against the support plate.
10. Secure to a fixed object. Ensure the spring is under slight tension when connecting the two parts.

IMPORTANT: Do not attach the speed sensor on a driven pulley. A driven pulley may have belt slippage in certain conditions, which may reduce speed sensing accuracy. The selected bend pulley should have a suitable diameter. The rotary speed of the bend pulley should be kept within the detection range of the speed sensor. The bend pulley should have a minimum of 30 degrees belt wrap to ensure positive rotation, because any slippage between the belt and the pulley may cause reduced accuracy of the belt scale.

2.1 Testing

After installation, test the unit to ensure proper mechanical and electrical operations. Make sure the cover is tightly secured and the conduit is sealed to prevent entry of water or moisture.

3.0 Troubleshooting

• Ensure that the rotary shaft is connected securely to the pulley.
• Ensure the unit is wired correctly and the connections are tight.
• Open the cover of the speed sensor. Ensure that the signal generator works properly.
• If the speed sensor still fails after the above check points have been performed, check the peripheral circuit for fault finding.

IMPORTANT: Do not try to modify or change the components without prior approval of Rice Lake Weighing Systems. Rice Lake Weighing Systems will have no liability for any damage caused by the user's modification even during the warranty period.

3.1 Spare Parts

Rice Lake Weighing Systems recommends keeping the following spare components on hand for each unit:

• Anti-rotation arm
• Spring
• Coupling (PN 123146)

3.2 FCC Compliance

United States

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case the user will be required to correct the interference at his own expense.

Canada

This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications. This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.

Company Information

© Rice Lake Weighing Systems. Specifications subject to change without notice. Rice Lake Weighing Systems is an ISO 9001 registered company.

Address: 230 W. Coleman St. • Rice Lake, WI 54868 • USA

Contact Numbers:

• U.S.: 800-472-6703
• Canada/Mexico: 800-321-6703
• International: 715-234-9171
• Europe: +31 (0)26 472 1319

Website: www.ricelake.com

Document Revision: January 25, 2022

Part Number: PN 164491 Rev A