Designed for conditioning low-level bridge signals, this DIN-rail signal conditioner accepts a 0 to 400 mV DC bridge signal from strain-gauge and load-cell sensors. It runs on an AC supply and rescales the input to a standard process current or voltage output. Great for isolating and transmitting signals from strain-gauge and load-cell bridges to PLCs and process instrumentation.
Designed for conditioning low-level bridge signals, this DIN-rail signal conditioner accepts a 0 to 400 mV DC bridge signal from strain-gauge and load-cell sensors. It runs on an AC supply and rescales the input to a standard process current or voltage output. Great for isolating and transmitting signals from strain-gauge and load-cell bridges to PLCs and process instrumentation.
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.
Features
Applications
| Input range | 100 to 10,000 Ω bridges @ 10 Vdc, drives up to four 350 Ω bridges @ 10 Vdc |
| Minimum input | 0 to 5 mV range, 0.5 mV/V sensitivity |
| Maximum input | 0 to 400 mV range, 40 mV/V sensitivity |
| Input impedance | 200 kΩ typical |
| Excitation voltage | Switch selectable 0 to 10 Vdc in 1 V increments |
| Maximum excitation output | 10 Vdc @ 120 mA |
| Excitation drive capability | Up to four 350 Ω bridges @ 10 Vdc |
| Excitation fine adjustment | ±5% via multi-turn potentiometer |
| Excitation 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 |
| Output ranges, voltage (10 mA max) | 0-1 to 0-10 Vdc |
| Output ranges, bipolar voltage (10 mA max) | ±5 or ±10 Vdc |
| Output ranges, current | 0-2 mA to 0-25 mA |
| Compliance, drive @ 20 mA | 20 V, 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 |
| 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 | 14 to 140°F (-10 to 60°C) |
| Thermal stability | Better than ±0.02% of span per °C |
| 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 |
| Power | Standard Power: 80 to 265 Vac, 50/60 Hz or 85 to 300 Vdc |
| Dimensions | 0.89 x 4.62 x 4.81" (22.5 W x 117 H x 122 mm D), height includes connectors |
| Weight | 5.6 oz (159 g) |
| Input range | 100 to 10,000 Ω bridges @ 10 Vdc, drives up to four 350 Ω bridges @ 10 Vdc |
| Minimum input | 0 to 5 mV range, 0.5 mV/V sensitivity |
| Maximum input | 0 to 400 mV range, 40 mV/V sensitivity |
| Input impedance | 200 kΩ typical |
| Excitation voltage | Switch selectable 0 to 10 Vdc in 1 V increments |
| Maximum excitation output | 10 Vdc @ 120 mA |
| Excitation drive capability | Up to four 350 Ω bridges @ 10 Vdc |
| Excitation fine adjustment | ±5% via multi-turn potentiometer |
| Excitation 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 |
| Output ranges, voltage (10 mA max) | 0-1 to 0-10 Vdc |
| Output ranges, bipolar voltage (10 mA max) | ±5 or ±10 Vdc |
| Output ranges, current | 0-2 mA to 0-25 mA |
| Compliance, drive @ 20 mA | 20 V, 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 |
| 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 | 14 to 140°F (-10 to 60°C) |
| Thermal stability | Better than ±0.02% of span per °C |
| 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 |
| Power | Standard Power: 80 to 265 Vac, 50/60 Hz or 85 to 300 Vdc |
| Dimensions | 0.89 x 4.62 x 4.81" (22.5 W x 117 H x 122 mm D), height includes connectors |
| Weight | 5.6 oz (159 g) |
