Summary of Contents for MSI MSI9008
- Page 1 MSI9008 CellScale Multiplexer User Guide Quality Industrial Weighing and Force Measurement Equipment Measurement Systems International...
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Page 2: Table Of Contents
Connecting Three Multiplexers To CellScale (Two A/D inputs reqd.) .. 11 Connecting Four Multiplexers To CellScale (Two A/D inputs reqd.) ..12 Setting Up and Optimizing Readings ............. 13 Scan Order ....................13 Page 2 MSI-9008 CellScale Multiplexer User Guide •... -
Page 3: Introduction
The Multiplexer features an LED indicator designating which channel is currently being switched to the output. The MSI-9000 CellScale controls the switching via three digital lines (Digital 0,1,2) on the CellScale load cell connector. Excitation is passed from the control unit through the Multiplexer to each of the individual input sources. -
Page 4: Cable Parameters
Cable Parameters The devices being connected to the Multiplexer should have a cable that will be connected via the feed through PG9 connectors on the MSI-9008 Multiplexer box. The feed through connectors are designed to accept cables with the following parameters:... -
Page 5: Load Cell Terminal Block
I N T E R N A T I O N A L Load Cell Terminal Block The load cell terminal block on the MSI-9008 Multiplexer PCA is divided into four sections; TB1A, TB1B, TB1C, and TB1D. When connecting load cells, excitation and shielding are shared connections for two channels at a time; i.e. - 1 + 5, 2 + 6, 3 + 7 and 4 + 8. -
Page 6: Cellscale Connections
CellScale Connections The MSI-9008 Multiplexer must be controlled by an MSI-9000 CellScale. A single CellScale can control up to four (4) multiplexer devices at one time. This is accomplished by the three digital control line outputs from the CellScale and the two signal inputs per A/D Converter (ADC) on the CellScale (maximum of 2 A/D Converters per CellScale). - Page 7 - Signal Channel 1 (J) (H) + Excitation + Signal Channel 1 (K) (L) - Excitation Mux Crtl Dig0 (C) (F) Dig Gnd Mux Crtl Dig1 (D) (E) Mux Crtl Dig 2 MSI-9008 CellScale Multiplexer User Guide Page 7 •...
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Page 8: Connecting One Multiplexer To Cellscale
I N T E R N A T I O N A L Multiplexer Cable #502305 To connect a secondary Multiplexer to a primary Multiplexer requires the secondary cable assembly, MSI part number 502305. This cable connects from TB2 on the secondary Multiplexer to TB2 on the primary Multiplexer. The following table shows the connections. -
Page 9: Connecting Two Multiplexers To Cellscale With One A/D
To connect two Multiplexer units to a CellScale with one A/D input requires the digital control lines and excitation lines be shared among the two MSI-9008 Multiplexers. The active signal output from the primary Multiplexer will be input to the CellScale signal input one. The active signal output from the secondary Multiplexer will be input to the pass thru connection on the primary Multiplexer;... -
Page 10: Connecting Four Multiplexers To Cellscale (Two A/D Inputs Reqd.)
CellScale scan list as channel 2-1. An example scan list is shown below. For details about connecting the hardware for this configuration, see the “CellScale Connections” section. Page 10 MSI-9008 CellScale Multiplexer User Guide •... -
Page 11: Connecting Two Multiplexers To Cellscale With One A/D
Multiplexer. The load cell connected to the CellScale via the secondary Multiplexer pass thru (if used) will be entered into the CellScale scan list as channel 4-1. An example scan list is shown below. For details about connecting the hardware for this configuration, see the “ CellScale Connections” section. MSI-9008 CellScale Multiplexer User Guide Page 11... -
Page 12: Connecting Three Multiplexers To Cellscale (Two A/D Inputs Reqd.)
Multiplexer pass thru lines) will be entered in the CellScale scan list as 4-X, where X corresponds to the labeled input on the Multiplexer. An example scan list is shown below. For details about connecting the hardware for this configuration, see the “CellScale Connections” section. Page 12 MSI-9008 CellScale Multiplexer User Guide •... -
Page 13: Setting Up And Optimizing Readings
Type in the desired setting and press Enter to accept "Enter" For additional information on channel setup, please reference the MSI-9000 CellScale User Guide. Scan Order The scan list in the CellScale is the order in which the CellScale scans the channels that are monitored. If there is a situation in which there is a channel that requires extra monitoring, it is legitimate to add the channel into the CellScale scan list more than once. - Page 14 Measurement Systems International MADE IN THE 14240 INTERURBAN AVENUE SOUTH STE 200 SEATTLE, WASHINGTON 98168-4661 U.S.A. © 2003 by Measurement Systems International PHONE: 206-433-0199 • FAX: 206-244-8470 Printed in U.S.A. WEB: www.msiscales.com • E-mail: info@msiscales.com PUB.287-08-03...
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