DMD4059 Series
Strain Gauge to DC Isolated Transmitter
M-5000/1110
Model Power
DMD4059
DMD4059D
Input Range
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
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
Zero Offset (Tare)
±100% of span in 15% increments
LED Indicators
Variable brightness LEDs for input/output loop level and status
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 0-25 mADC
Compliance, drive at 20 mA: 20 V, 1000 drive
Current output can be selectively wired for sink or source
Output Linearity, Ripple & Noise
Better than ±0.1% of span, <10 mVRMS ripple and noise
Output Zero and Span
Multi-turn potentiometers to compensate for load and lead variations, ±15% of span adjustment range typical
Output Test Button
Sets output to test level when pressed
Potentiometer adjustable 0-100% of span
Response Time
70 milliseconds typical, faster response times are available
Common Mode Rejection
100 dB minimum
Isolation
1200 VRMS min.
Full isolation: power to input, power to output, input to output
Ambient Temperature Range and Stability
–10°C to +60°C operating ambient
Better than ±0.02% of span per °C stability
Power
Standard: 80-265 VAC, 50/60 Hz or 48-300 VDC
D option: 9-30 VDC (either polarity) or 10-32 VAC
Power consumption: 2 to 5 W depending on number of load cells
80-265 VAC or 48-300 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 (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.
User’s Guide
Shop online at
omega.com
e-mail: info@omega.com
For latest product manuals:
omegamanual.info
MADE IN
2
DMD4059 Series DC-DC Isolated Transmitter
Range Selection
It is generally easier to select ranges before installing the module on
the DIN rail. The tables below list available settings and ranges. The
table on the next page is used for offsets. The module side label lists
common ranges.
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
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
Refer to the sensor manufacturer's
recommendations to determine
what excitation voltage to use.
Set Excitation rotary switch A to
desired excitation voltage.
After installation the excitation fine
adjust potentiometer may be used
to precisely trim this voltage, if
desired.
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.
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 power last.
Module Power Terminals
When using DC power, either polarity is acceptable, but for consistency with similar API products, positive (+) can be wired to terminal
13 and negative (–) can be wired to terminal 16. Connect I/O wiring
before power wiring.
Excitation Switch A
10 V
9 V
8 V
7 V
6 V
5 V
4 V
3 V
2 V
1 V
0 V
A
9
8
7
6
5
4
3
2
1
0
Signal Input Terminals
Refer to strain gauge manufacturer’s data sheet for wire colorcoding. Polarity must be observed when connecting inputs.
CAUTION: Never short the excitation leads together. This will cause
internal damage to the module.
A five- or six-lead bridge has one or two sense leads respectively.
Sense leads allow the DMD4059 to compensate for leadwire resistance effects. Connect the sense leads if used. Polarity must be
observed.
If no sense lead is used, jumper sense (+) terminal 6 and excitation
(+) 12.
Final trim adjustment should be done after all connections are made.
Signal Output Terminals
Polarity must be observed when connecting the signal 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 the device's input terminals. Typical voltage may be 9-24 VDC.
Device Connected to Output Terminal Terminal Switch E
(+)
V
I
I
Voltage input
Passive mA (current) input.
Module provides loop power
mA (current) input device that
provides loop power.
3 (–) 4 (+)
(+20 V)
3 (–) 4
2 (–) 3
Sensor shield wire
(if equipped) should be
grounded at one end only
Sense +
(if used)
Exc. +
V
EX +
Sig.
Strain
–
Gauge
Sig.
V0 +V0 –
+
VEX –
Exc. –
Sense –
(if used)
Connect up to 4 strain gauges or load cells.
Colors shown are an example only.
See manufacturer's specifications for wiring
designations.
13 Power AC or DC +
14 Earth Ground
16 Power AC or DC –
Loop
Power
Source
OMEGA Engineering, Inc.
Excitation
4-20
mA
Input
Ri
+ –
+
–
– +
21 3 4
4-20
mA
Input
– +
21 34
Voltage
Input
– +
21 34
65 78
Output
Test Cal.
Test
Span
Zero
DMD4059
Strain Gauge to DC
Isolated Transmitter
LED
Input
LED
1091112
1413 15 16
Current Sinking
Output
Switch E
set to “I”
Current Sourcing
Output
Switch E
Ri
set to “I”
+20 V
Voltage Output
Switch E
set to “V”
Jumper 6 to 12 if sense
leads are not used
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
Output 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
Switches
Input
0-5 mV
0-10 mV
0-20 mV
0-25 mV
0-30 mV
0-40 mV
0-50 mV
0-100 mV
0-120 mV
0-200 mV
0-250 mV
0-300 mV
0-400 mV
BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE BCDE
200V 208V 201V 206V 209V 202V 207V 203V 204V 205V 200I 208I 201I 206I 209I 202I 207I 203I
A00V A08V A01V A06V A09V A02V A07V A03V A04V A05V A00I A08I A01I A06I A09I A02I A07I A03I
300V 308V 301V 306V 309V 302V 307V 303V 304V 305V 300I 308I 301I 306I 309I 302I 307I 303I
600V 608V 601V 606V 609V 602V 607V 603V 604V 605V 600I 608I 601I 606I 609I 602I 607I 603I
E00V E08V E01V E06V E09V E02V E07V E03V E04V E05V E00I E08I E01I E06I E09I E02I E07I E03I
B00V B08V B01V B06V B09V B02V B07V B03V B04V B05V B00I B08I B01I B06I B09I B02I B07I B03I
000V 008V 001V 006V 009V 002V 007V 003V 004V 005V 000I 008I 001I 006I 009I 002I 007I 003I
800V 808V 801V 806V 809V 802V 807V 803V 804V 805V 800I 808I 801I 806I 809I 802I 807I 803I
F00V F08V F01V F06V F09V F02V F07V F03V F04V F05V F00I F08I F01I F06I F09I F02I F07I F03I
100V 108V 101V 106V 109V 102V 107V 103V 104V 105V 100I 108I 101I 106I 109I 102I 107I 103I
400V 408V 401V 406V 409V 402V 407V 403V 404V 405V 400I 408I 401I 406I 409I 402I 407I 403I
C00V C08V C01V C06V C09V C02V C07V C03V C04V C05V C00I C08I C01I C06I C09I C02I C07I C03I
900V 908V 901V 906V 909V 902V 907V 903V 904V 905V 900I 908I 901I 906I 909I 902I 907I 903I