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DRA-CSM-1

CURRENT MULTIPLEXER

User’s Guide

http://www.omega.com

e-mail: [email protected]

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Summary of Contents for DRA-CSM-1

Page 1: ...DRA CSM 1 CURRENT MULTIPLEXER User sGuide http www omega com e mail info omega com ...

Page 2: ...any omega com United Kingdom 25 Swannington Road P O Box 7 Omega Drive ISO 9002 Certified Broughton Astley Leicestershire Irlam Manchester LE9 6TU England M44 5EX England Tel 44 1455 285520 Tel 44 161 777 6611 FAX 44 1455 283912 FAX 44 161 777 6622 Toll Free in England 0800 488 488 e mail uk omega com omega comTM OMEGA It is the policy of OMEGA to comply with all worldwide safety and EMC EMI regul...

Page 3: ...TAGE 6 CONNECTING TRANSMITTERS TO THE MULTIPLEXER 6 1 Two Wire Transmitter 6 2 Three Wire Transmitter 6 3 Four Wire Transmitter 7 CONTROL 7 1 Enable Test 7 2 Address 7 3 Address Polarity 7 4 Control Tables 7 4 1 True Low Setting 7 4 2 True High Setting 8 MULTI DROP CONFIGURATION 9 SPECIFICATIONS 1 ...

Page 4: ...put module The unit provides 16 current limited 40mA voltage supply V outputs These outputs are derived from the mux s power supply input and are used to feed two wire transmitters The current limitation avoids fuse blowing in cases of short circuit of the transmitters leads The DRA CSM 1 is designed for standard DIN rail mounting Place the unit on the upper part of the mounting rail with the fast...

Page 5: ...voltage required to operate the multiplexer and the transmitters fed by it can be calculated using the following equation Vmin Vt 0 02 Rs 350 3 The DRA CSM 1 unit includes three printed circuit cards designated as P N 7016 P N 7017 and P N 7030 The printed circuit cards should occupy the slots in the enclosure according to fig1 c Disconnect the flat connectors from the front panel d Replace the bl...

Page 6: ...TING THE TRANSMITTERS TO THE MULTIPLEXER 6 1 TWO WIRE TRANSMITTER A Two Wire transmitter is connected so that its positive terminal is connected to the V terminal and its negative terminal is connected to the I terminal see fig 2 Figure 2 6 2 THREE WIRE TRANSMITTER A Three Wire transmitter is connected so that its positive terminal V is connected to the multiplexer V terminal its negative terminal...

Page 7: ...utput module can be used see fig 5 5 Figure 5 7 1 ENABLE TEST The unit is enabled when E T is in logical 0 low state In a disabled state the DRA CSM 1 outputs no current and reflects a Hi Z state The disabled state of the DRA CSM 1 multiplexer is used to check the functioning of all the current inputs This is performed by simultaneously injecting current pulses to all 16 channels which cause the f...

Page 8: ...Low Setting 7 4 2 True High Setting ADDRESS BUS E T OUTPUT CHANNEL A0 A1 A2 A3 1 1 1 1 1 0 0 0 0 1 0 0 1 1 0 0 1 0 1 0 0 0 0 0 0 9 10 11 12 13 1 1 1 x 1 1 1 x 0 1 1 x 1 0 1 x 0 0 0 1 14 15 16 TEST MODE ADDRESS BUS E T OUTPUT CHANNEL A0 A1 A2 A3 0 0 0 0 0 0 0 0 0 1 0 0 1 1 0 0 1 0 1 0 0 0 0 0 0 1 2 3 4 5 0 0 0 x 1 1 1 x 0 1 1 x 1 0 1 x 0 0 0 1 6 7 8 TEST MODE Figure 6 ADDRESS BUS E T OUTPUT CHANNEL...

Page 9: ...nnection of several DRA CSM 1 units to one PLC s analog input by tying their output terminals and the address lines in parallel and applying individual Enable lines to select the desired multiplexer by disabling all but one see fig 7 Figure 7 ENABLE 1 MSB LSB ENABLE 2 DISCRETE OUTPUT MODULE ANALOG INPUT MODULE PLC ANALOG ANALOG POWER SUPPLY ...

Page 10: ...N 40050 0 75 Kg 1 5 lb 73Hx200Wx121mmD 2 88 x7 88 x4 76 INPUTS ANALOG INPUTS Reverse Polarity Protected Max Input Current CONTROL INPUTS Logic Levels Logic Polarity OUTPUTS CURRENT OUTPUT Switching time Accuracy Refer to Current Input V TERMINALS V Voltage Limitation Current Automatic Temperature Shut down INDICATORS 16 0 4 20mA Current loop 30mA 4 Address inputs E T Enable Test input Low 0 0 4V H...

Page 11: ...MEGA if the unit is found to be defective it will be repaired or replaced at no charge OMEGA s WARRANTY does not apply to defects resulting from any action of the purchaser including but not limited to mishandling improper interfacing operation outside of design limits improper repair or unauthorized modification This WARRANTY is VOID if the unit shows evidence of having been tampered with or show...

Page 12: ... Paddlewheel Systems Totalizers Batch Controllers pH CONDUCTIVITY pH Electrodes Testers Accessories Benchtop Laboratory Meters Controllers Calibrators Simulators Pumps Industrial pH Conductivity Equipment DATA ACQUISITION Data Acquisition Engineering Software Communications Based Acquisition Systems Plug in Cards for Apple IBM Compatibles Datalogging Systems Recorders Printers Plotters HEATERS Hea...

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