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Table of contents for the manual
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Page 1
DRA-RTM-8 ANALOG MUL TIPLEXER User’s Guide http://www .omega.com e-mail: info@omega.com[...]
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USA and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGASM Customer Service: 1-800-622-2378 / 1-800-622-BESTSM Engineering Service: 1-800-872-9436 / 1-800-USA-WHENS M TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA Mexico and Latin America: T el: (95) 800-TC-OMEGASM F AX: (95) 203-359-7807 En Espanol: (95) 203 359-7803 e-mail: espanol@omega.com[...]
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C o n t e n t s 1. GENERAL DESCRIPTION 2. MOUNTING INSTRUCTIONS 3. REPLACING FUSES 4. ASSEMBL Y 5. CURRENT INPUTS 6. CONNECTING TRANSMITTERS TO THE MUL TIPLEXER 7. CONNECTING Pt-100 TO THE MUL TIPLEXER 8. CONNECTING THE MUL TIPLEXER TO A PLC 9. CONTROL 9.1 Enable 9.2 Address 9.3 Address Polarity 9.4 Control Tables 10. CALIBRA TION 10.1 Calibration [...]
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Page 4
1. GENERAL DESCRIPTION 2 W ARNING: Never install a fuse rated more than 800mA The DRA-R TM-8 is a multiplexer for 16 analog inputs - eight of which, marked 1-8, are direct inputs for Pt-100 sensors, while the remaining (9-16), are for 4- 20mA current loops. The DRA-R TM-8 output format is a 4-20mA current loop, with a 28mA limitation. Each Pt-100 i[...]
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Page 5
3 Inser t the two printed cards into their slots. Connect the flat cable between them. Connect the front panel flat cables. The panel must be inser ted into the grooves on both sides of the case while pressing down until a distinct "click" is heard. Assembly is completed by laying the terminal strips in place. Note: The terminal strips ar[...]
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4 Figure 4. 7. CONNECTING Pt-100 TO THE MUL TIPLEXER The Pt-100 probe should be connected according to fig 4. The three wires connecting the probe should be identical. The distance of the probe can be up to 200 meters. A shielded cable is recommended. The shield should be grounded at one point. When possible, connect the ground at the multiplexer&a[...]
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5 9.2 ADDRESS The required channel is selected by four address lines. The operating voltages are: Logical "1" 5V < V i < 60V Logical "0" 0V < Vi< 0.5V 9.3 ADDRESS POLARITY (see fig 6) Address polarity is controlled by three internal pins and a jumper over two of them, located on PN 7021 printed circuit board, accessi[...]
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6 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 1 1 1 1 1 9 10 11 12 13 1 1 1 x 1 1 1 x 0 1 1 x 1 0 1 x 1 1 1 0 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 1 1 1 1 1 1 2 3 4 5 0 0 0 x 1 1 1 x 0 1 1 x 1 0 1 x 1 1 1 0 6 7 8 TEST MODE 9.4.2 "TRUE HIGH&q[...]
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7 * The calibrator is set according to DIN 43760 Pt-100 table ( a = 0.00385) 10.2 CALIBRA TION T ABLES Note: Logic state of "0" is when the DIP switch lever is down. 10.2.1 "ZERO" - COARSE CALIBRA TION T ABLES ZERO TEMP O C CHANNELS 1-4 SW5 SW4 SW6 -50.....10 8.....75 74...140 139...206 205...272 270...338 336...404 401...470 1 [...]
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8 12. SPECIFICA TIONS 11. MUL TIDROP CONFIGURA TION In the disabled state (E=0), the multiplexer outputs no current and exhibits a high Z state. This mode allows the connection of several DRA-R TM-8 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[...]
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RETURN REQUESTS / INQUIRIES Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBT AIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SER VICE DEP ARTMENT (IN ORDER TO A VOID PROCESSING DELA YS). The assigned AR number should then be marked o[...]
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Where Do I Find Ever ything I Need for Pr ocess Measurement and Control? OMEGA…Of Course! TEMPERA TURE ⻬ Thermocouple, R TD & Thermistor Probes, Connectors, Panels & Assemblies ⻬ W ire: Thermocouple, R TD & Thermistor ⻬ Calibrators & Ice Point References ⻬ Recorders, Contr ollers & Process Monitors ⻬ Infrared Pyr ome[...]