Omega Products DMD4059 User Manual

BRIDGE/STRAIN GAGE
SIGNAL CONDITIONER

FIELD RANGEABLE ISOLATED VOLTAGE OR CURRENT OUTPUTS

Input: 100 to 10,000 Ω Bridges

0.5 to 40 mV/V
Output: 0-1 to 0-10V, ±5 or ±10V,
or 0-1 to 4-20 mA
(Sink or Source)

DMD4059 Series

U Standard DIN Rail Mounting
U Drives up to Four 350 Ω Bridges
U Non-Interactive Zero and Span
U Fast Setup–Over 100 I/O Ranges
U Removable Connectors
U Full 3-Way Isolation
U Output Test Button
U Adjustable Excitation, 1 to 10 Vdc
U Zero Offset

Applications

DMD4059,
shown smaller than
actual size with standard
DIN rail (sold separately).

U Load Cell Weighing and Scales
U Strain Gage Pressure Transducers
U Tanks, Melt Pressure, Level, Flow

The DMD4059 accepts an input from 1 to 4 full
Wheatstone strain bridge sensors, pressure transducers
or load cells. It provides filtering, amplifies, and converts
the millivolt input signal into the selected dc voltage or
current output that is linear to the input. The 3-way
1200V isolation eliminates ground loops, common mode
voltages and greatly reduces noise pick-up. Sense wire
connections are available to give maximum accuracy.

Input, output, excitation and zero offset are field
configurable via external rotary and slide switches.
Offsets of up to ±100% of span can be used to cancel
sensor offsets or tare fixed loads. Features such as
red and green LEDs vary in intensity to show input and
output activity and an output test button helps with set-up
and troubleshooting.

SPECIFICATIONS

Input Range: 100 to 10,000 Ω bridges @ 10 Vdc, up to

four 350 Ω bridges @ 10 Vdc

Minimum: 0 to 5 mV range, 0.5 mV/V sensitivity
Maximum: 0 to 400 mV range, 40 mV/V sensitivity

STRAIN GAGES

E

Detail of front panel.

Input Impedance: 200 kΩ typical
Excitation Voltage: Switch selectable 0 to 10 Vdc in

1V increments

Maximum Output: 10 Vdc @ 120 mA
Drive Capability: Up to four 350 Ω bridges @ 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 Lead Wire Resistance: 10 Ω with 350 Ω @ 10 Vdc
Zero Offset (Tare): ±100% of span in 15% increments

E-1

E-1

Output Ranges:
Voltage (10 mA max): 0-1 to 0-10 Vdc
Bipolar Voltage (10 mA max): ±5 or ±10 Vdc
Current: 0-2 mA to 0-25 mA
Compliance, Drive @ 20 mA: 20V, 1000 Ω drive;

current output can be selectively wired for sink or source.
Output Linearity, Ripple and Noise: Better than ±0.1% of

span, <10 mV rms ripple and noise
Output Zero and Span (Fine Adjustment): Multi-turn

potentiometers to compensate for load and lead variations,
±15% of span adjustment range typical

Function Test Button: Sets output to test level when
pressed. Adjustable 0 to 100% of span via potentiometer.
Factory default is approx 50% of span.

Response Time: 70 ms typical

EXCITATION SWITCH

VOLTAGE POSITION

10 A
9 9
8 8
7 7
6 6
5 5
4 4
3 3
2 2
1 1
0 0

Common Mode Rejection: 100 db min
Isolation: 1200 Vrms min, 3-way isolation, power to input,

power to output and input to output

Operating Temp Range: -10 to 60°C (14 to 140°F)
Thermal Stability: Better than ±0.02% of span per °C
Standard Power: 80 to 265 Vac, 50/60 Hz or 85 to 300 Vdc
Low Voltage Option: 9 to 30 Vdc or 10 to 32 Vac
Power Consumption: 2 to 5 W depending upon number

of load cells

Mounting: Mounts to standard 35 mm DIN rail
Environmental Protection: IP40
Connections: Four 4-terminal removable connectors

14 AWG max wire size
Dimensions: 22.5 W x 117 H x 122 mm D

(0.89 x 4.62 x 4.81"), height includes connectors

Weight: 159 g (5.6 oz)

CONNECTIONS

TERMINAL NO. SIGNAL

3 Sig. Out ­ 4 Sig. Out +
6 Sense Lead
9 Sig. Input +
10 Exc. ­ 11 Sig. Input ­ 12 Exc. +
13 Power +
16 Power -

SETUP INPUT AND OUTPUT

Input

Output

Rotary Switches BCD BCD BCD BCD BCD BCD BCD BCD BCD BCD

0 to 1V 200 A00 300 600 E00 B00 000 800 100 400
0 to 5V 209 A09 309 609 E09 B09 009 809 109 409
1 to 5V 206 A06 306 606 E06 B06 006 806 106 4066
±5V 204 A04 304 604 E04 B04 004 804 104 404
0 to 10V 203 A03 303 603 E03 B03 003 803 103 403
±10V 205 A05 305 605 E05 B05 005 805 105 405
4 to 20 mA 207 A07 307 607 E07 B07 007 807 107 407

Example: 0 to 30 mV input, 4 to 20 mA output: Code E07. Set switch “B” to E, switch “C” to 0 and switch “D” to 7.

To Order

Visit omega.com/dmd4059 for Pricing and Details

0 to 5 mV

0 to 10 mV

0 to 20 mV

0 to 25 mV

0 to 30 mV

0 to 40 mV

0 to 50 mV

0 to 100 mV

0 to 200 mV

MODEL NO. DESCRIPTION

DMD4059 Standard voltage isolated strain gage signal conditioner (AC/DC powered)
DMD4059-DC Low voltage isolated strain gage signal conditioner (AC/DC powered)

Comes complete with operator’s manual.
Ordering Example: DMD4059, standard power, isolated strain gage signal conditioner.

E-2

0 to 250 mV