INSTRUCTION MANUAL (MAN-13467) CLASSIC SERIES DIN RAIL AMPLIFIER WITH ISOLATED OUTPUT MWI-13467 REVISION CA Industrial Products Division 7550 Hub Parkway Cleveland, Ohio 44125 Phone: 216.524.8800 Fax: 216.642.2131 www.CMCcontrols.
CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS MAN-13467 REV CA REVISION HISTORY Rev ECO Author Date Description of Change AA XXX DJM 04/05/04 As Released BA CLE2913 DJM 08/12/04 Updated block diagram, 4-20 mA section, Replaced Transducer Wiring Diagram, Added Damped mA with Scaling Board diagram CA CLE3311 PW 11/04/05 Revised figures.
MAN-13467 REV CA CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS TABLE OF CONTENTS 1 PRODUCT OVERVIEW .................................................................................5 1.1 GENERAL DESCRIPTION .....................................................................................................5 1.1.1 CE EMC Responsibility .............................................................................................6 1.2 GENERAL SPECIFICATIONS....................................................
CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS MAN-13467 REV CA WARRANTY Cleveland Motion Controls warrants the goods against defects in design, materials and workmanship for the period of 12 months from the date of delivery on the terms detailed in the Cleveland Motion Controls, Inc. Terms and Conditions of Sale, document number AO-90131 Cleveland Motion Controls, Inc. reserves the right to change the content and product specification without notice.
MAN-13467 REV CA CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS 1 PRODUCT OVERVIEW 1.1 GENERAL DESCRIPTION The Classic Series DIN Rail amplifier (Isolated) provides a complete signal conditioning solution for amplifying and reporting signals from a pair of strain gage-based load cells. Either semiconductor or foil-based load cells can be used and the Classic Series Isolated DIN Rail amplifier offers an added benefit of an isolation amplifier stage to provide galvanic isolation.
CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS 1.1.1 MAN-13467 REV CA CE EMC RESPONSIBILITY Cleveland Motion Controls DIN Rail Amplifier MWI-13467 Classic Series module can be considered a component performing a direct function and therefore is subject to the provisions of the EMC Directive. The Cleveland Motion Controls DIN Rail Amplifier MWI-13467 module may be used by a manufacturer as a component of a larger system, along with other components, which may or may not bear the CE mark.
MAN-13467 REV CA 1.2 CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS GENERAL SPECIFICATIONS Item Specification Comments Power Supply Requirements 24 VDC @ 120 milliAmps Basic Isolated Amplifier Power Supply Limits 20 to 28 VDC Basic Isolated Amplifier Transducer Excitation (Vexc) 5.0 or 10.0 VDC Shipped with V EXC. Set at 5.0 VDC. 100milliAmp maximum. Switchable to 10 VDC with internal switch. Transducer Resistance Range 100 to 1000 Ohms Do not exceed maximum excitation current.
CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS 1.5 MAN-13467 REV CA ENVIRONMENTAL REQUIREMENTS Requirement Description Enclosure IP20 NEMA 1 Operating temperature 0 to 55 degrees C 32 to 132 degrees F Humidity Non-condensing 85% at 55 degrees C 85% at 132 degrees F Altitude 1000 meters 3300 feet Atmosphere Non-flammable, non-corrosive and dust free Storage temperature range -25 to 80 degrees C -13 to 176 degrees F Transport temperature range -25 to 80 degrees C -13 to 176 degrees F 1.
MAN-13467 REV CA CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS Figure 1 - Block Diagram of Classic Series DIN RAIL MWI -13467 Page 9 of 30
CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS MAN-13467 REV CA 2 SETUP AND CONFIGURATION 2.
MAN-13467 REV CA Power Supply Terminals Output Terminals RECOGNITION DIAGRAMS RIGHT SIDE VIEW Transducer Terminals LEFT SIDE VIEW O Series DIN Rail Amplifier MWI-13467 Figure 2 - Front and Side Views of Classic Figure 3 - Classic Series DIN Rail Amplifier Mounting Diagram Page 11 of 30 LOAD CELL AMPLIFIER WITH ISOLATED OUPUTS CMC PART NUMBER: MWI-13467 www.CMCcontrols.com WIRING DIAGRAM 2.
CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS 2.5 MAN-13467 REV CA CONFIGURING THE SWITCH SETTINGS A number of operational characteristics can be configured prior to mounting or wiring the amplifier. We recommended that you first familiarize yourself with the internal switch locations, settings, and potentiometers by opening the snap-on access cover. Figure 4 illustrates the location of configurable items on each of the printed circuit boards.
MAN-13467 REV CA 2.6 CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS POTENTIOMETERS In addition to the Gain and Zero adjustable Potentiometers visible on the front of the unit, there is an adjustment you can make by removing the snap-off cover on the side of the amplifier. The adjustment is located on the input printed circuit board as shown in Figure 4.
CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS MAN-13467 REV CA When changing the internal Jumper-switch settings, it is always advisable to change the settings with the 24 VDC power removed. If this is not possible, it becomes particularly important to use a non-conductive tool to alter switch positions. Make sure that Jumper- switch settings are fully in position to avoid accidentally leaving a switch in an “inbetween” state.
MAN-13467 REV CA 2.11.2 CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS TRANSDUCER WIRING C 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 RED C A WHT T B BLK C RED C A WHT B T BLK XDCR 1 Figure 5 - Pair of Half-bridge Transducers Wiring The successful amplification of low-level signals from strain gage transducers requires particular attention to wiring practices to avoid signal degradation in the industrial environment. Degradation can result from AC noise pickup and/or DC errors.
CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS 2.12.1 MAN-13467 REV CA POWER WIRING DIAGRAM The 0.38 A fuse in the +24VDC power lead is required for protection of the amplifier in the event of amplifier or power supply malfunction.
MAN-13467 REV CA CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS 2.12.2.1 4 TO 20 MA ANALOG CURRENT LOOP The 4-20 mA current loop output is undamped and can be used concurrently with the other outputs. The 20 mA current level corresponds to the +10V output. The 4 mA level corresponds to 0 volts on the 10V output. This output does not have an individual Gain and Zero Potentiometer adjustment.
CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS MAN-13467 REV CA 2.12.2.2 APPLICATION INTERFACE DETAILS The 4-20 mA output stage is designed to drive a loop current through a floating burden resistance. Examples of driving a loop current through a floating burden resistance include: a loop powered 4-20 mA display or, the isolated input of receiving electronics (isolated Analog to Digital input).
MAN-13467 REV CA CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS 1 2 3 4 5 6 7 8 4 to 20 mA i + + 1 2 3 4 5 6 7 8 While possible to interface the 4-20 mA current loop into circuits which do exhibit resistances between their burden and the amplifier isolated COM, (refer to Figure 10.), this is a less desirable configuration. If you chose to wire the amplifier in this way, you must keep the following in mind.
CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS MAN-13467 REV CA 2.12.2.4 DAMPED +/- 1 MA ANALOG The meter output stage can be configured to operate as current output (sinking or sourcing current depending upon output polarity). It can be used concurrently with the other outputs. It does not have an individual Gain and Zero adjustment, necessitating that a compromise be made during calibration, or a particular output be favored (over one that can accommodate external scaling and offsetting).
MAN-13467 REV CA 3.1.2 CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS POWER APPLICATION Apply DC power to the amplifier and use a DC voltmeter to confirm that the supply polarity and voltage is within the prescribed limits. As soon as is practical, confirm that the excitation voltage is either 5.0 VDC or 10.0 VDC as appropriate for the type of load cells being used. Promptly identifying any over-voltage condition can help minimize potential damage to the strain gage elements internal to the transducer.
CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS 3.3 MAN-13467 REV CA SAFETY CONSIDERATIONS Don’t let safety be an afterthought. Before beginning calibration of transducers, review and follow applicable policies and procedures to ensure worker safety. Machinery must be in a safe state, and you should be aware of additional hazards that can arise when calibrating higher force transducers.
MAN-13467 REV CA 3.6 CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS ACCURACY CONSIDERATIONS The application of an accurate calibration force requires careful attention to minimizing the non-ideal affects of the real world. Keep the following points in mind: • Allow the transducer and amplifier to reach thermal equilibrium before conducting calibration. Ideally, the temperature should reflect the expected operating conditions.
CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS 3.7 MAN-13467 REV CA PROPER PRACTICES FOR APPLYING CALIBRATION FORCES Seldom is a transducer oriented such that the calibration can be done by simply hanging a true dead weight from the roll. By generating a tension force that follows the same web path across the roll, you avoid the necessity of making manual (numerical) calculations to correct for the details of different wrap angle, transducer orientation, etc.
MAN-13467 REV CA CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS Examples of Inaccurate Wrap Angles In this example, there was a disregard for maintaining the correct wrap angle. The dotted line indicates the proper web path. In this example, the true web path was difficult to access and an incorrect path was implemented using a convenient, but incorrect anchor point.
CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS MAN-13467 REV CA Examples of Force Loss due to Friction at Driven Roll In this example, by rearranging the anchor point and the force location as well as utilizing the idle roll, the frictional losses are minimized. In this example, only a fraction of the test force is transferred to the transducer due to drag from the driven roll. 3.8 ADJUSTMENT TOOLS Using the correct tools simplifies making the necessary adjustments during the setup procedure.
MAN-13467 REV CA 3.9 CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS ADJUSTING AMPLIFIER COARSE ZERO A coarse offset adjustment has been provided. Keep in mind that the Coarse Zero adjustment is usually only adjusted one time, typically when the amplifier is installed, or transducers are replaced. 1. Ensure that the IA gain setting has been set as described in section 2.5. 2. Set the Zero pot on the front cover to mid-way (approximately 9 turns from either clutch actuation). 3.
CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS 3.11 MAN-13467 REV CA EMC CONNECTIONS AND INSTALLATION GROUND 0 TO 10V LOAD 5000 OHM MIN RESISTANCE 1mA GROUND BRAIDED SHIELD CONNECTED TO GROUND WITH 360 DEGREE BONDS ON EACH END.
MAN-13467 REV CA Appendix A. CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS MANUFACTURERS DECLARATION OF CONFORMITY Number: AO-90311 Manufacturer: Cleveland Motion Controls, Inc. 7550 Hub Parkway Cleveland, Ohio 44125 U.S.A.
CLASSIC SERIES AMPLIFIER W/ ISOLATED OUTPUTS Appendix B. MAN-13467 REV CA CABLE GLANDS Several manufacturers provide cable glands that can be used to ensure the integrity of the EMC requirements when installing this equipment in the enclosure. The objective of the cable gland is to provide a good mechanical entry into the enclosure to protect the cable and also provide an electrical bond the outer shield (screen) of the cable to the enclosure.
