DMD4059 DMD4059-DC Strain Gauge to DC Isolated Transmitter M-5000/0219 Model DMD4059 DMD4059-DC Power 85-265 VAC, 50/60 Hz or 60-300 VDC 9-30 VDC or 10-32 VAC Description The DMD4059 accepts an input from one to four strain gauges, bridge sensors, load cells, or pressure transducers. It filters, amplifies, and converts the resulting millivolt signal into the selected DC voltage or current output that is linearly related to the input. The full 3-way (input, output, power) isolation makes this module useful for ground loop elimination and signal isolation. The adjustable excitation power supply generates a stable source of voltage to drive from one to four 350 Ω (or greater) devices. Sense lead circuitry is included to cancel the effects of leadwire resistance. Input, output, excitation and zero offset (up to ±100% of span) are field configurable. Non-interactive zero and span simplifies calibration. A 20 VDC loop excitation supply for the output can be selectively wired to power passive mA devices. A green input LED and a red output LED vary in intensity with changes in the process input and output signals. An output test button provides a fixed output (independent of the input) when held depressed. The test output level is potentiometer adjustable from 0 to 100% of output span. Strain Gauge Input Ranges 100 Ω to 10,000 Ω bridges at 10 VDC Up to four 350 Ω bridges at 10 VDC Minimum: 0 to 5 mV range 0.5 mV/V sensitivity Maximum: 0 to 400 mV range 40 mV/V sensitivity Millivolt output range is determined by the sensor sensitivity (mV/V) and the excitation voltage: mV/V sensitivity X excitation voltage = total mV range Input Impedance 200 kΩ typical Common Mode Rejection 100 dB minimum Calibration Resistor Options M01 option: Switch with calibration resistor inside module. Specify resistor value. M02 option: Switch for external (load cell) calibration resistor. Excitation Voltage Switch Selectable: 0-10 VDC in 1 V increments Maximum Output: 10 VDC maximum at 120 mA Drive Capability: Up to four 350 Ω bridges at 10 VDC Fine Adjustment: ±5% via multi-turn potentiometer Stability: ±0.01% per °C Sense Lead Compensation Better than ±0.01% per 1 Ω change in leadwire resistance Maximum leadwire resistance: 10 Ω with 350 Ω at 10 VDC LoopTracker Variable brightness LEDs for input/output loop level and status DC Output Ranges Voltage (10 mA max.): 0-1 VDC to 0-10 VDC Bipolar Voltage (±10 mA max.): ±5 VDC or ±10 VDC Current: 0-2 mADC to 0-20 mADC Compliance, drive at 20 mA: 20 V, 1000 Ω drive Current output can be selectively wired for sink or source Output Calibration Multi-turn zero and span potentiometers ±15% of span adjustment range typical Zero offset switch: ±100% of span in 15% increments User’s Guide Shop online at omega.com Output Test Sets output to test level when pressed Adjustable 0-100% of span Not available with M01 or M02 options Output Ripple and Noise Less than 10 mVRMS ripple and noise Linearity Better than ±0.1% of span Ambient Temperature Range and Stability –10°C to +60°C operating ambient Better than ±0.02% of span per °C stability Response Time 70 milliseconds typical (14.2 Hz) DF option: 10 millisecond (100 Hz) response time typical (output noise will exceed specifications) Contact factory for custom response times Isolation 1200 VRMS min. Full isolation: power to input, power to output, input to output Housing and Connectors IP 40, requires installation in panel or enclosure For use in Pollution Degree 2 Environment Mount vertically to a 35 mm DIN rail Four 4-terminal removable connectors 14 AWG max wire size Dimensions 0.89" W x 4.62" H x 4.81" D 22.5 mm W x 117 mm H x 122 mm D Height includes connectors Power Standard: 85-265 VAC, 50/60 Hz or 60-300 VDC D option: 9-30 VDC (either polarity) or 10-32 VAC Power: 2 to 5 Watts depending on number of load cells e-mail: firstname.lastname@example.org For latest product manuals: www.omegamanual.info Lifetime MADE IN TM Pb Lead Free WARNING: This product can expose you to chemicals including nickel, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov DMD4059 Series Strain Gauge to DC Isolated Transmitter 012 EF 1. Set Switch A for desired Excitation Voltage. 2. Set Switches B/C/D for desired Input / Output ranges. 3. Set Switch E for Voltage or Current as required. 4. Set Excitation / Zero / Span / Test Cal. Controls Position 10V 9V 8V 7V 6V 5V 4V 3V 2V 1V 0V A 9 8 7 6 5 4 3 2 1 0 INPUT OUTPUT 0- Voltage 5m 0- V 10 mV 020 mV 025 mV 030 mV 040 mV 050 mV 010 0m 020 V 0m 0V 25 0m V Excitation Switch For more Details and Instructions see Data Sheet Rotary Switches BCD BCD BCD BCD BCD BCD BCD BCD BCD BCD 0-1V 0-5V 1-5V +/-5V 0-10V +/-10V 4-20mA BC D Using Offset Switch C Offset switch C allows canceling or taring of non-zero deadweights or other sensor offsets such as: OO Compensate for tare weights or scale deadweight to get zero output when a load is on the platform. OO Compensate for low-output sensors (e.g., less than 1 mV/V) that may have large zero offsets. Switch C can realign the zero control so it has enough range to produce the desired zero output. OO Raising the offset to allow calibration of bipolar sensors such as ±10 mV. OO Lowering the offset to compensate for elevated input ranges such as 10-20 mV. 200 209 206 204 203 205 207 A00 A09 A06 A04 A03 A05 A07 300 309 306 304 303 305 307 600 609 606 604 603 605 607 E00 E09 E06 E04 E03 E05 E07 B00 B09 B06 B04 B03 B05 B07 000 009 006 004 003 005 007 800 809 806 804 803 805 807 100 109 106 104 103 105 107 400 409 406 404 403 405 407 1. Switch C does not interact with any other switch and is the only switch needed to correct zero offsets. Its only purpose is to adjust or cancel effects of the low end of the input range not corresponding nominally to 0 mV. Setting this switch to “0” results in no offset. 2. To RAISE the output zero, rotate switch C from “1” thru “7”, until the Zero control can be set for your application. 3. To LOWER the output zero, rotate switch C from “9” thru “F”, until the Zero control can be set for your application. 4. After all switches are set, repeat the calibration procedure. EXAMPLE: 012 EF BC D 012 90 1 EF E 7 8 8 9A Signal Sig. Out – Sig. Out + Sense Lead Sig. Input + Exc. – Sig. Input – Exc. + Power + Power – D 34 5 67 3 4 6 9 10 11 12 13 16 Output V I Output C 34 5 8 9A Connections Term. # B 34 5 BC D A Offset 0-30mV IN, 4-20mA OUT: CODE 0E7 Set switch “B” to 0; “C” to E; “D” to 7 Input 4 56 Excitation 67 Output Switches Input DMD4059 8 9A I/O Range Selection B, C, D, E 1. From the table below, find the rotary switch combination that matches your I/O ranges and set rotary switches B, C, and D. 2. Set switch E to "V" for voltage output or "I" for current output. 3. For ranges that fall between the listed ranges use the next highest setting and trim the output signal with the zero and span potentiometers as described in the Calibration section. Strain Gauge to DC Isolated Transmitter 67 Range Selection Rotary switches and a slide switches on the side of the module are used to select input and output ranges to match your application. Switch A: Excitation voltage Switch B: Input range Switch C: Input offset (see table on next page) Switch D: Output range Switch E : Set to "V" for voltage output or Set to "I" for current output It is generally easier to select ranges before installing the module on the DIN rail. The tables below list available settings, ranges, and offsets. The module side label lists common ranges. Determine how much output in millivolts the load cell will produce at full load. Multiply the manufacturer's mV/V sensitivity specification by the applied excitation voltage. For example, a load cell rated for 3 mV/V sensitivity using 10 VDC excitation will produce an output of 0 to 30 mV for load variations from 0 to 100%. 3 mV/V sensitivity X 10 VDC excitation = 30 mV range Excitation Voltage Setup Excitation Switch A Refer to the sensor manufacA 10 V turer's recommendations to 9 9V determine what excitation voltage to use. 8 8V Set Excitation rotary switch A to 7 7V desired excitation voltage. 6 6V After installation the excitation 5 5V fine adjust potentiometer may 4 4V be used to precisely trim this 3 3 V voltage, if desired. 2 2V 1 1V 0 0V 2 3 2 Offset Switch C % of Span 7 105% 6 90% 5 75% 4 60% 3 45% 2 30% 1 15% 0 0% 9 –15% A –30% B –45% C –60% D –75% E –90% F –105% 0-1 V 0-2 V 0-4 V 1-5 V 0-5 V 0-8 V 2-10 V 0-10 V ±5 V ±10 V 0-2 mA 0-4 mA 0-8 mA 2-10 mA 0-10 mA 0-16 mA 4-20 mA 0-20 mA BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE 0-5 mV 200V 208V 201V 206V 209V 202V 207V 203V 204V 205V 200I 208I 201I 206I 209I 202I 207I 203I 0-10 mV A00V A08V A01V A06V A09V A02V A07V A03V A04V A05V A00I A08I A01I A06I A09I A02I A07I A03I 0-20 mV 300V 308V 301V 306V 309V 302V 307V 303V 304V 305V 300I 308I 301I 306I 309I 302I 307I 303I 0-25 mV 600V 608V 601V 606V 609V 602V 607V 603V 604V 605V 600I 608I 601I 606I 609I 602I 607I 603I 0-30 mV E00V E08V E01V E06V E09V E02V E07V E03V E04V E05V E00I E08I E01I E06I E09I E02I E07I E03I 0-40 mV B00V B08V B01V B06V B09V B02V B07V B03V B04V B05V B00I B08I B01I B06I B09I B02I B07I B03I 0-50 mV 000V 008V 001V 006V 009V 002V 007V 003V 004V 005V 000I 008I 001I 006I 009I 002I 007I 003I 0-100 mV 800V 808V 801V 806V 809V 802V 807V 803V 804V 805V 800I 808I 801I 806I 809I 802I 807I 803I 0-120 mV F00V F08V F01V F06V F09V F02V F07V F03V F04V F05V F00I F08I F01I F06I F09I F02I F07I F03I 0-200 mV 100V 108V 101V 106V 109V 102V 107V 103V 104V 105V 100I 108I 101I 106I 109I 102I 107I 103I 0-250 mV 400V 408V 401V 406V 409V 402V 407V 403V 404V 405V 400I 408I 401I 406I 409I 402I 407I 403I 0-300 mV C00V C08V C01V C06V C09V C02V C07V C03V C04V C05V C00I C08I C01I C06I C09I C02I C07I C03I 0-400 mV 900V 908V 901V 906V 909V 902V 907V 903V 904V 905V 900I 908I 901I 906I 909I 902I 907I 903I Electrical Connections Check white model/serial number label for module operating voltage to make sure it matches available power. WARNING! All wiring must be performed by a qualified electrician or instrumentation engineer. See diagram at right for terminal designations and wiring examples. Avoid shock hazards! Turn signal input, output, and power off before connecting or disconnecting wiring. Connect I/O wiring before power wiring. Module Power Terminals When using DC power, either polarity is acceptable, but for consistency with similar products, positive (+) can be wired to terminal 13 and negative (–) can be wired to terminal 16. Signal Input Terminals Connect up to 4 strain gauges or load cells. See manufacturer’s specifications for wiring designations and wire color-coding. Polarity must be observed when connecting inputs. CAUTION: Never short the excitation leads together. This will cause internal damage to the module. Some bridges may have one or two sense leads. See manufacturer’s specifications. Sense leads allow the DMD4059 to compensate for leadwire resistance effects. Observe polarity when connecting sense leads. If no sense lead is used, jumper sense (+) terminal 6 and excitation (+) 12. Calibration should be done after all connections are made. Signal Output Terminals Polarity must be observed when connecting the signal output. The DMD4059 output can be wired to provide either a sinking or sourcing mA output. If your device accepts a current input, determine if it provides power to the current loop or if it must be powered by the DMD4059 module. Use a multi-meter to check for voltage at your device’s input terminals. Typical voltage may be 9-24 VDC. See the wiring diagram for the appropriate connections. DMD4059 Series Strain Gauge to DC Isolated Transmitter Output Wiring 4-20 mA Device Ri Current sinking output Loop + switch E set to “I” Power External device provides – power to output loop Source 1 + – – + 2 Device Connected to Output Terminal Terminal Switch E 3 4 Passive 4-20 mA Device Ri Current sourcing output switch E set to “I” +20 V at terminal 4 – 1 2 +20V 3 4 Voltage Device Voltage output switch E set to “V” – 1 No Sense Leads 2 + 3 4 Jumper 6 to 12 ONLY if sense leads are NOT used 5 6 7 8 OMEGA Engineering, Inc. Exc + Excitation VEX + Output LED Test Cal. V0 + Sig + Span VEX – Input LED Zero Strain Gauge to DC Isolated Transmitter 6 Sense + Sig – 5 With Sense Leads Sensor shield wire (if equipped) should be grounded at one end only Sense + Excitation Test Cal. Sig + VEX – Zero Sig + Power AC or DC + Earth Ground Power AC or DC – Input LED DMD4059 9 Module Power LED Strain Gauge to DC Isolated Transmitter 10 11 12 Sense – Exc – Sense – Output Test Span 13 14 16 8 Sig – VEX + Exc – 7 OMEGA Engineering, Inc. Exc + V0 + Exc + Sig + 10 11 12 Exc – 9 Strain Gauge V Passive mA (current) input. Module provides loop power 3 (–) 4 (+20 V) I mA (current) input device that provides loop power. 2 (–) 3 (+) I Output 1 2 3 4 Cal. and Sense 5 6 7 8 To avoid damage to the module, do not make any connections to unused terminals Wire terminal torque 0.5 to 0.6 Nm or 4.4 to 5.3 in-lbs 9 10 11 12 Power 13 14 15 16 Excitation Voltage Trim Variable Brightness Output Indicator Output Test Level Adjust Push to Test Output Output Span Calibration Variable Brightness Input Indicator Output Zero Calibration DMD4059 Exc – Sig – V0 – 4 (+) Test Exc + Strain Gauge 3 (–) Input Sensor shield wire (if equipped) should be grounded at one end only Sig – V0 – Voltage input 13 14 15 16 Calibration The Zero, Span, and Excitation potentiometers are used to calibrate the output. Note: Perform the following calibration procedure any time switch settings are changed. This calibration procedure does not account for offsets or tare weights. If your system has an offset, tare weight or deadweight, refer to the "Using Offset Switch C" procedure. To achieve optimum results, the system should be calibrated using an accurate bridge simulator, pressure calibrator, or calibration weights depending on the application. 1. Apply power to the module and allow a minimum 20 minute warm up time. 2. Using an accurate voltmeter across terminals 10 and 12, adjust the excitation voltage potentiometer for the exact voltage desired. 3. Provide an input to the module equal to zero or the minimum input required for the application (for example, 4 mA for a 4-20 mA output or –10 V with a ±10V output). 4. Using an accurate measurement device for the module output, adjust the Zero potentiometer for the exact minimum output signal desired. The Zero control should only be adjusted when the input signal is at its minimum. 5. Set the input at maximum, and then adjust the Span pot for the exact maximum output desired. The Span control should only be adjusted when the input signal is at its maximum. 6. Repeat the zero and span calibration for maximum accuracy. 3 Output Test Function When the test button is depressed it will drive the output with a known good signal that can be used as a diagnostic aid during initial start-up or troubleshooting. When released, the output will return to normal. The Test Cal. potentiometer can be used to set the test output to the desired level. It is adjustable from 0 to 100% of the output span. Press and hold the Test button and adjust the Test Cal. potentiometer for the desired output level. Installation Precautions WARNING! Avoid shock hazards! Turn signal input, output, and power off before connecting or disconnecting wiring, or removing or installing module. Mounting to a DIN Rail The housing clips to a standard 35 mm DIN rail. The housing is IP40 rated and requires a protective panel or enclosure. Do not block air flow. Allow 1” (25 mm) above and below housing vents for air circulation. 1. Tilt front of module downward and position against DIN rail. 2. Clip lower mount to bottom edge of DIN rail. 3. Push front of module upward until upper mount snaps into place. Removal 1. Push up on the bottom back of the module. 2. Tilt front of module downward to release upper mount from top edge of DIN rail. 3. The module can now be removed from the DIN rail. Operation Strain gauges and load cells are normally passive devices that are commonly referred to as “bridges” due to their four-resistor Wheatstone bridge configuration. These sensors require a precise excitation source to produce an output that is directly proportional to the load, pressure that is applied to the sensor. The exact output of the sensor (measured in millivolts) is determined by the sensitivity of the sensor (mV/V) and the excitation voltage applied. An additional input, the sense lead, monitors the voltage drop in the sensor leads and automatically compensates the excitation voltage at the module in order to maintain a constant excitation voltage at the sensor. The DMD4059 provides the excitation voltage to the sensors and receives the resulting millivolt signal in return. This input signal is filtered and amplified, then offset, if required, and passed to the output stage. Depending on the output configuration selected, a DC voltage or current output is generated. The green input LED provides a visual indication that a signal is being sensed by the input circuitry of the module. It also indicates the input signal strength by changing in intensity as the process changes from minimum to maximum. If the LED fails to illuminate, or fails to change in intensity as the process changes, check the module power or signal input wiring. Note that it may be difficult to see the LEDs under bright lighting conditions. The red output LED provides a visual indication that the output signal is functioning. It becomes brighter as the input and the corresponding output change from minimum to maximum. For current outputs, the red LED will only light if the output loop current path is complete. For either current or voltage outputs, failure to illuminate or a failure to change in intensity as the process changes may indicate a problem with the module power or signal output wiring. Diagnostic Voltage Measurements Using a meter with at least 10 megaohm input impedance, measure the voltage coming from the strain gauge at the locations shown. Sensitivity is measured in mV/V. Positive Negative Meter Reading Meter Reading Meter Lead Meter Lead No pressure/load Full pressure/load + Exc. – Exc. Excitation Voltage Excitation Voltage + Sig. – Exc. + ½ Excitation Voltage ½ Excitation Voltage + (½ x Excitation Voltage x Sensitivity) – Sig. – Exc. + ½ Excitation Voltage ½ Excitation Voltage – (½ x Excitation Voltage x Sensitivity) + Sig. – Sig. Zero Volts Excitation Voltage x Sensitivity WARRANTY/DISCLAIMER OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum coverage on each product. If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, 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 shows evidence of having been damaged as a result of excessive corrosion; or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not limited to contact points, fuses, and triacs. OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of OMEGA with respect to this order, whether based on contract, warranty, negligence, indemnification, strict liability or otherwise, shall not exceed the purchase price of the component upon which liability is based. In no event shall OMEGA be liable for consequential, incidental or special damages. CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should any Product(s) be used in or with any nuclear installation or activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility as set forth in our basic WARRANTY/DISCLAIMER language, and, additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product(s) in such a manner. 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 OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return package and on any correspondence. The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit. FOR NON-WARRANTY REPAIRS, consult FOR WARRANTY RETURNS, please have the OMEGA for current repair charges. Have following information available BEFORE contacting the following information available BEFORE OMEGA: contacting OMEGA: 1.Purchase Order number under which the product 1. Purchase Order number to cover the COST was PURCHASED, of the repair, 2.Model and serial number of the product under 2. Model and serial number of the product, and warranty, and 3. Repair instructions and/or specific problems 3. Repair instructions and/or specific problems relative to the product. relative to the product. OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers the latest in technology and engineering. OMEGA is a registered trademark of OMEGA ENGINEERING, INC. © Copyright 2017 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the prior written consent of OMEGA ENGINEERING, INC.
* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project