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RDP Customer Document
Technical Manual
TRANSDUCER AMPLIFIER
TYPE S7DC
Doc. Ref CD1202AF
This manual applies to units of mod status 8 ONWARDS
Affirmed by Declaration
of Conformity
USA & Canada
All other countries
RDP Electrosense Inc.
RDP Electronics Ltd
2216 Pottstown Pike
Grove Street, Heath Town,
Pottstown, PA 19465
Wolverhampton, WV10 0PY
U.S.A.
United Kingdom
Tel (610) 469-0850
Tel: +44 (0) 1902 457512
Fax (610) 469-0852
Fax: +44 (0) 1902 452000
E-mail
info@rdpe.com
E-mail:
sales@rdpe.com
www.rdpe.com
www.rdpe.com
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Table of Contents
Related Manuals for RDP Group S7DC
Summary of Contents for RDP Group S7DC
- Page 1 RDP Customer Document Technical Manual TRANSDUCER AMPLIFIER TYPE S7DC Doc. Ref CD1202AF This manual applies to units of mod status 8 ONWARDS Affirmed by Declaration of Conformity USA & Canada All other countries RDP Electrosense Inc. RDP Electronics Ltd 2216 Pottstown Pike...
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Page 2: Table Of Contents
INDEX INTRODUCTION ..................... 3 Declaration of Conformity ..................4 INSTALLATION ....................... 5 CONNECTIONS ...................... 6 Supply / output connections ..................6 Transducer connections ..................7 Full bridge Strain Gauge Transducer ..............7 1/4 or 1/2 bridge transducer connections ..............7 Potentiometric Transducers .................. -
Page 3: Introduction
INTRODUCTION The S7DC is an in-line d.c. amplifier intended to provide variable excitation and signal amplification for strain gauge type transducers. It will operate from unregulated single or dual tracking power supplies and provide up to 10V output (or 4-20mA) with transducer signals from 10mV to 10V. -
Page 4: Declaration Of Conformity
Declaration of conformity DECLARATION OF CONFORMITY RDP ELECTRONICS LTD. Grove Street Heath Town Wolverhampton West Midlands WV10 0PY United Kingdom We declare that the product described in this technical manual is manufactured by RDP Electronics Limited and performs in conformity to the following: The Electromagnetic Compatibility Directive 2014/30/EU RoHS Directive 2011/65/EU EMC Regulations SI2016/1091... -
Page 5: Installation
Where this does not apply and also where there is no grounding connection via the connection cable to the S7DC, then a separate grounding wire should be connected from the transducer body to the S7DC SCN terminal. -
Page 6: Connections
CONNECTIONS Supply / output connections Voltage output, single supply. This arrangement should only be used if (b) is not possible. If this arrangement is used, either the supply V- or the output common 0V (or both) must be fully floating ie only one can be grounded. Failure to do this may result in damage to the amplifier that is not covered by warranty. -
Page 7: Transducer Connections
EXC- Full bridge Strain Gauge Transducer Transducer connector details are as shown in Fig. 1 and on the S7DC circuit board. To use the shunt calibration facility, insert a link between 'CAL' and 'SIG-'. 1/4 or 1/2 bridge transducer connections For 1/4 bridge transducers, 3 bridge completion resistors are required. -
Page 8: Fig. 2 Signal Cable Installation For Optimum Emc
Fig. 2 Signal Cable Installation for Optimum EMC Cable Cores Trim Rubber Seal Cable Shield Double Back Plastic Sleeve Cable Over Plastic Sleeve Insert the end of the cable, plus the plastic sleeve into the metal outer shell of the gland. -
Page 9: Controls
CONTROLS 4.01 Output Mode Link: The "OUTPUT" jumper link is set to "V" for voltage output or "mA" for current output. Three 20-turn screwdriver-adjusted controls are provided for controlling: 4.02 Excitation - allowing continuous variation of excitation between 3V and 10V. Note: if supply is <13V, the max. -
Page 10: Bandwidth/Noise Capacitor
4.11 Maximum 4-20mA loop resistance Vs. Supply Voltage. The maximum permissible 4-20mA loop resistance depends upon the supply voltage to the S7DC unit. Please note, and do not exceed the maximum supply voltage detailed in the specification. Max loop resistance = ((Total supply Voltage - 12) x 25 ) + 100... -
Page 11: Setting-Up Procedure, Voltage Output
SETTING-UP PROCEDURE, Voltage Output (OUTPUT jumper set to "V") Refer also to Section 7 for Shunt Calibration Method. Determine the transducer bridge output from the manufacturer's data sheet and adjust the coarse gain control as shown in Section 4.05. Check that sliders 5 and 6 are set to OFF. -
Page 12: Shunt Calibration Facility
SHUNT CALIBRATION FACILITY Refer to Section 4.06 for Operation This is applicable to resistance bridge transducers only, e.g. most load cells and pressure transducers (not semi-conductor gauges). The Shunt Calibration Facility can be used as:- A Calibration Check. When the prime calibration has been made by applying a precise known pressure or load to the transducers as described in Section 5 or 6, the R-CAL relay can be operated (normally with zero pressure or load applied) and the output recorded as the Calibration Check figure. -
Page 13: Specification
SPECIFICATION 1. 10 to 36V or 2. ±5V to ±18V. Refer to “Output” and Supply Voltage “Temperature Range” below Supply Current 30mA + Excitation Load + Output Current typical + CAL relay. Output 1. ±3V to ±10V max. according to supply voltage. See Sect 4.10 into 2k... - Page 14 Shunt Calibration DIL switch operation or Remote Cal. Connection to V- connects 59k via relay with 15 to 36V supply (or 10-23V supply with SP2 fitted). Current 10-25mA. EMC Specification When subjected to radiated electromagnetic energy (as EN61000-4-3) an additional error can occur at certain frequencies: Field Strength Typical Maximum Error...
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Page 15: Functional Checks
Check that if D works, the transducer is zero when attempting to obtain ZERO o/p. Check EXCITATION setting with the transducer disconnected. Try another transducer if possible, otherwise return transducer to factory. Try another S7DC if possible, otherwise return S7DC to factory. -
Page 16: Warranty And Service
WARRANTY AND SERVICE WARRANTY. R.D.P. Electronics products are warranted against defects in materials or workmanship. This warranty applies for one year from the date of delivery. We will repair or replace products that prove to be defective during the warranty period provided they are returned to R.D.P.
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