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Summary of Contents for Rice Lake 30 Series
- Page 1 SCT Weight Transmitter 30 Series Installation & Operator’s Manual 159585...
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Page 3: Table Of Contents
Course descriptions and dates can be viewed at www.ricelake.com/training or obtained by calling 715-234-9171 and asking for the training department. © Rice Lake Weighing Systems. All rights reserved. Printed in the United States of America. Specifications subject to change without notice. - Page 4 Rice Lake continually offers web-based video training on a growing selection of product-related topics at no cost. Visit www.ricelake.com/webinars. SCT-30 Weight Transmitter Manual...
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Page 5: Introduction
Do not operate or work on this equipment unless you have read and understand the instructions and warnings in this manual. Contact any Rice Lake Weighing System dealer for replacement manuals. Proper care is your responsibility. Risk of electrical shock. No user serviceable parts. Refer to qualified service personnel for service. - Page 6 1.1.3 Equipment Recommendations Failure to follow the installation recommendations will be Important considered a misuse of the equipment. To Avoid Equipment Damage • Keep away from heat sources and direct sunlight. • Protect the instrument from rain. • Do not wash, dip in water or spill liquid on the instrument. •...
- Page 7 Connecting Several Cells in Parallel: Connect several load cells in parallel by using, if necessary, a watertight junction box with a terminal box. The load cell connection extension cables must be shielded, placed individually into their piping or conduit, and laid as far as possible from the power cables (in case of 4-wire connections, use cables with 4 x 1 sq.mm minimum cross-section).
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Page 8: Specifications
1.1.6 Load Cell Testing Load Cell Resistance Measurement (Use a Digital Multimeter): • Disconnect the load cells from the instrument and check that there is no moisture in the load cell junction box caused by condensation or water infiltration. If so, drain the system or replace it if necessary. - Page 9 Power Supply And Consumption (VDC) 12 - 24 VDC ±10% ; 5 W No. of Load Cells in Parallel and Supply max 8 ( 350 ohm ) ; 5VDC/120mA Linearity / Analog Output Linearity < 0.01% F.S. ; < 0.01% F.S. Thermal Drift / Analog Output Thermal <...
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Page 10: Electrical Connections
Electrical Connections • It is recommended that the negative side of the power supply be grounded. • It is possible to power up to eight 350 ohm or sixteen 700 ohm load cells. • Connect terminal “0 VDC” to the RS-485 common of the connected instruments in the event that these receive alternating current input or that they have an opto- isolated RS-485. -
Page 11: Analog Output Type Selection
SCT-30 SCT-30 SCT-30 max 500 m 24 Vcc RS485 + RS485 + RS485 - RS485 - CONVLAU Figure 1-3. RS-485 Serial Connection If the RS-485 network is longer than 100 meters or baud rates higher than Note 9600 are used, connect two 120 ohm terminating resistors between the ‘+’... -
Page 12: Instrument Commissioning
Instrument Commissioning Power on the transmitter and wait five minutes until all the components have reached a stable temperature. Check that the display shows the mV value of the load cells and that when loading the load cells there is an increase in weight. If there is not, check and verify the connections and correct positioning of the load cells. -
Page 13: Calibration
2.0 Calibration Before carrying out the instrument real calibration, the type of analog output must be selected and the tare weight zero setting must be performed. 2.1 Real Calibration (With Sample Weights) Load a sample weight (at least 50% of the full scale value) onto the weighing system. -
Page 14: Theoretical Calibration
2.2 Theoretical Calibration Theoretical calibration may be carried out with or without load cells Note connected to the instrument. The analog output is zero (4 mA for the 4-20 mA output case) when the value read by the cell is 0 mV. Hold down the control knob and set the selector switch to within FS CAL... -
Page 15: Rs-485 Serial Connection
3.0 RS-485 Serial Connection The instrument transmits via RS-485 serial port, according to a continuous one way protocol or a querying protocol (MODBUS RTU). The division value will be between 0 and 200000 for load cell signal values between 0 and 10 mV. For protocol setting, see Section 4.0. - Page 16 RESPONSE Address Function No. bytes Register1 Register 2 2 bytes 0x03 0x04 0x0064 0x00C8 Tot. bytes = 3+2*No. registers+2 where: No. of registers = number of Modbus registers to be read, starting from register 1 address; No. of bytes = number of following data bytes; In the event of a string received correctly but not executable, the slave responds with an EXCEPTIONAL RESPONSE.
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Page 17: Alarms
Status Register (40007) Cell Error (ERCEL) Bit 0 AD Convertor Malfunction (ER AD) Bit 1 Off scale analog output (ER OL) Bit 2 Bit 3 Division negative sign Bit 7 Weight stability Bit 11 Bit 12 H&L DIVISIONS (40008-40009) For additional examples regarding the generation of correct control characters (CRC16) refer to the manual Modicon PI-MBUS-30. -
Page 18: Reserved For The Installer
4.0 Reserved for the Installer 4.1 Restoring Factory Values Turn off the instrument and set the selector switch to ZERO. While holding down the control knob, turn the instrument back on until the following is displayed: CANC Release the control knob and set the selector switch to NORMAL. Rotate the control knob to display YES. - Page 19 MADE IN WRITING AND SIGNED BY A CORPORATE OFFICER OF AND THE UYER © Rice Lake Weighing Systems, Inc. Rice Lake, WI USA. All Rights Reserved. RICE LAKE WEIGHING SYSTEMS • 230 WEST COLEMAN STREET • RICE LAKE, WISCONSIN 54868 • USA...
- Page 20 1 to reach on-call personnel. Fax Number 715-234-6967 E-mail US sales and product information at prodinfo@ricelake.com International (non-US) sales and product information at intlsales@ricelake.com Mailing Address Rice Lake Weighing Systems 230 West Coleman Street Rice Lake, WI 54868 USA 16 SCT-30 Weight Transmitter Manual...
- Page 21 Notes Reserved for the Installer 17...
- Page 22 Notes 18 SCT-30 Weight Transmitter Manual...
- Page 24 230 W. Coleman St. Rice Lake, WI 54868 U.S. 800-472-6703 Canada/Mexico 800-321-6703 International 715-234-9171 Europe +31 (0) 88 2349171 www.ricelake.com www.ricelake.mx www.ricelake.eu www.ricelake.co.in m.ricelake.com © Rice Lake Weighing Systems 12/2013 PN 159585...
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