Dual-Channel Controllers and
Single-Channel Indicators
- Available for use with AC or DC LVDTs
- Available for 120-220V AC or 24 V DC operation
- Four independently programmable set points
- Available with four 5.0 A Form A relays
- Available with 0-10 V DC or 4-20 mA outputs
- Available with RS-232 or Ethernet ports
The DMC Series Dual-Channel Controllers and the DMI Series Single-Channel Indicators can be used in conjunction with AC LVDTs and DC LVDTs to make up a comprehensive, reliable, measurement system. The combination can be applied to a wide variety of demanding measurement applications, such as in process gaging in automated assembly machinery, differential measurements in thickness gaging, and other comparative measurements. Utilize the units' programmable set points, relays and PLC capabilities (DMC units only) and you have an economical solution when you need control functions for comparative and direct measurements in smaller automated systems. The 6-digit (DMC) and 5-digit (DMI) alphanumeric LED displays provide easy to follow setup prompts for all LVDT parameters using the intuitive scrolling text configuration menus.
The LVDT input module of the DMC-A2 Series Dual-Channel AC LVDT Controller is designed to drive and condition the signals from two AC LVDT transducers, while the input module of the DMI-A1 Series Single-Channel AC LVDT Indicator is designed to drive and condition the signal from a single AC LVDT. The input module of the DMI-D1 Series Single-Channel DC-LVDT Indicator is designed to drive and condition the signal from a single DC LVDT.* The modules contain two high-speed micro controllers and a 16-bit dual channel A/D converter which communicate internally via the .2C data bus. When the DMC-A2 and DMI-A1 are used with AC LVDTs, one of the micro controllers generates the sine wave for the AC LVDT excitation frequency. These frequencies are produced as multiples of the line frequency (either 50 Hz or 60 Hz that is selectable via the scrolling text menus). Up to 16 excitation frequencies are available and are selected using the scrolling text menus.
The 16-bit A/D converter has over 130 dB noise rejection at the excitation frequencies and is capable of 40 Hz averaged output on 45 samples. Scrolling text menus provide quick access to a range of configuration modes for easy AC LVDT application setup.
Units operate on 120-220 V AC input power (although the DMI-A1 is available for 24 V DC operation) and can be purchased with either 0-10 V DC or 4-20 mA analog outputs. Other options include four 5A Form A relays, and ports for either RS-232 serial, or Ethernet communication. A free software configuration utility for all models is also available for download.
* Consult factory for DMC-D2 Series Dual-Channel DC LVDT Controller for DC LVDTs
- DMC-A2 Series
- DMI-A1 Series
- DMI-D1 Series
| General | |
| Digital Display | 14-segment alphanumeric, 0.56” (14.2 mm) LEDs |
| Display Color | Red |
| Display Range | -199999 to 999999 |
| Display Update Rate | 1, 4, 10 or 20 times per second |
| Display Dimming | 8 brightness levels. Front panel selectable |
| Scrolling Display Text Messaging | Full alphanumeric text characters supported |
| Polarity | Assumed positive. Displays – negative |
| Annunciators | 6 red LEDs on front panel; one per setpoint |
| Front Panel Controls | PROGRAM, UP, and DOWN buttons |
| Power Supplies | Standard high voltage AC power supply 85-265 VAC, or optional low voltage DC power supply 10-72 V DC |
| Environmental | |
| Operating Temperature | 32 °F to 122 °F |
| 0 °C to 50 °C | |
| Storage Temperature | -4 °F to 158 °F |
| -20 °C to 70 °C | |
| Relative Humidity | 95% (non-condensing) at 104°F (40°C) |
| Mechanical | |
| Case Dimensions | 1/8 DIN, 3.78” x 1.89” |
| 96 x 48 mm | |
| Case Depth | 5.39" (137 mm) maximum |
| Case Material | 94V-0 UL rated self-extinguishing polycarbonate |
| Weight | 0.79 lbs., 0.96 lbs. when packed |
| 11.5 oz., 14 oz. when packed | |
| Approvals | |
| CE | As per EN-61000-3/4/6 and EN-61010-1 |
| LVDT Input Module | |
| Excitation Voltage | 3 V rms sine wave, zero DC component THD <2% (1.2 kHz) |
| Excitation Frequency | x 16 selectable frequencies available (1.2 kHz to 11.5 kHz). Crystal locked, software driven |
| Temperature Coefficient | ± 50 ppm/ °C of full scale (typ.) |
| Dual LVDT Inputs | 30 kΩ input impedance. Synchronous demodulation of excitation carrier. >130 dB rejection of excitation carrier |
| Frequency Response | 500 Hz (–3 dB) low-pass filter |
| Analog to Digital | Dual channel ΣΔ A/D converter approaching 19-bit resolution. Ratiometric operation relative to excitation voltage magnitude |
| Dual Output Rates | Rapid and average response outputs. 1 Hz, 2 Hz, 10 Hz, 20 Hz, 40 Hz averaged |
| Line Frequency Rejection | 50 or 60 Hz noise rejection |
| Relay Output Modules | |
| Four Relay Module | Available with four 5 A Form A Relays; 5 A 240 V AC, 4 A 24 VDC Isolation 3000 V. UL and CSA listed |
For DMC-A2 Dual-Channel Controller for AC LVDTs, with 120-220 V AC input power, four (4) independently programmable set points, four (4) 5 A Form A relays, 0-10 V DC analog output, and RS-232 serial port, order by Model Number:
DMC-A2-821
For DMC-A2 Dual-Channel Controller for AC LVDTs, with 120-220 V AC input power, four (4) independently programmable set points, four (4) 5 A Form A relays, 0-10 V DC analog output, and Ethernet port, order by Model Number:
DMC-A2-822
| General | |
| Digital Display | 7-segment, 0.56” (14.2 mm) LEDs |
| Display Color | Red |
| Display Range | -19999 to 99999 |
| Display Update Rate | 10 times per second |
| Display Dimming | 8 brightness levels. Front panel selectable |
| Polarity | Assumed positive. Displays – negative |
| Annunciators | 6 red LEDs on front panel |
| Front Panel Controls | PROGRAM, UP, and DOWN buttons |
| Power Supplies | Standard high voltage AC power supply 85-265 VAC, or optional low voltage DC power supply 10-72 V DC |
| Environmental | |
| Operating Temperature | 32 °F to 122 °F |
| 0 °C to 50 °C | |
| Storage Temperature | -4 °F to 158 °F |
| -20 °C to 70 °C | |
| Relative Humidity | 95% (non-condensing) at 104°F (40°C) |
| Mechanical | |
| Case Dimensions | 1/8 DIN, 3.78” x 1.89” |
| 96 x 48 mm | |
| Case Depth | 5.39" (137 mm) maximum |
| Case Material | 94V-0 UL rated self-extinguishing polycarbonate |
| Weight | 0.79 lbs., 0.96 lbs. when packed |
| 11.5 oz., 14 oz. when packed | |
| Approvals | |
| CE | As per EN-61000-3/4/6 and EN-61010-1 |
| LVDT Input Module | |
| Excitation Voltage | 3 V rms sine wave, zero DC component THD <2% (1.2 kHz) |
| Excitation Frequency | x 16 selectable frequencies available (1.2 kHz to 11.5 kHz). Crystal locked, software driven |
| Temperature Coefficient | ± 50 ppm/ °C of full scale (typ.) |
| LVDT Input | 30 kΩ input impedance. Synchronous demodulation of excitation carrier. >130 dB rejection of excitation carrier |
| Frequency Response | 500 Hz (–3 dB) low-pass filter |
| Analog to Digital | Single channel ΣΔ A/D converter approaching 19-bit resolution. Ratiometric operation relative to excitation voltage magnitude |
| Output Rate | 10 Hz average response output |
| Line Frequency Rejection | 50 or 60 Hz noise rejection |
| Relay Output Modules | |
| Four Relay Module | Available with four 5 A Form A Relays; 5 A 240 V AC, 4 A 24 VDC Isolation 3000 V. UL and CSA listed |
For DMI-A1 Single-Channel Indicator for AC LVDTs, with 120-220 V AC input power, four (4) independently programmable set points, and 0-10 V DC analog output, order by Model Number:
DMI-A1-111
For DMI-A1 Single-Channel Indicator for AC LVDTs, with 120-220 V AC input power, four (4) independently programmable set points, four (4) 5 A Form A relays, 0-10 V DC analog output, and RS-232 serial port, order by Model Number:
DMI-A1-811
For DMI-A1 Single-Channel Indicator for AC LVDTs, with 120-220 V AC input power, four (4) independently programmable set points, four (4) 5 A Form A relays, 0-10 V DC analog output, and Ethernet port, order by Model Number:
DMI-A1-812
For DMI-A1 Single-Channel Indicator for AC LVDTs, with 120-220 V AC input power, four (4) independently programmable set points, four (4) 5 A Form A relays, 4-20 mA output, and RS-232 serial port, order by Model Number:
DMI-A1-831
For DMI-A1 Single-Channel Indicator for AC LVDTs, with 120-220 V AC input power, four (4) independently programmable set points, four (4) 5 A Form A relays, 4-20 mA output, and Ethernet port, order by Model Number:
DMI-A1-832
For DMI-A1 Single-Channel Indicator for AC LVDTs, with 24 V DC input power, four (4) independently programmable set points, four (4) 5 A Form A relays, and
0-10 V DC analog output, order by Model Number:
DMI-A1-911
For DMI-A1 Single-Channel Indicator for AC LVDTs, with 24 V DC input power, four (4) independently programmable set points, four (4) 5 A Form A relays, 4-20 mA output, and RS-232 serial port, order by Model Number:
DMI-A1-931
| General | |
| Digital Display | 7-segment, 0.56” (14.2 mm) LEDs |
| Display Color | Red |
| Display Range | -19999 to 99999 |
| Display Update Rate | 10 times per second |
| Display Dimming | 8 brightness levels. Front panel selectable |
| Polarity | Assumed positive. Displays – negative |
| Annunciators | 6 red LEDs on front panel |
| Front Panel Controls | PROGRAM, UP, and DOWN buttons |
| Power Supplies | Standard high voltage AC power supply 85-265 VAC, or optional low voltage DC power supply 10-72 V DC |
| Environmental | |
| Operating Temperature | 32 °F to 122 °F |
| 0 °C to 50 °C | |
| Storage Temperature | -4 °F to 158 °F |
| -20 °C to 70 °C | |
| Relative Humidity | 95% (non-condensing) at 104°F (40°C) |
| Mechanical | |
| Case Dimensions | 1/8 DIN, 3.78” x 1.89” |
| 96 x 48 mm | |
| Case Depth | 5.39" (137 mm) maximum |
| Case Material | 94V-0 UL rated self-extinguishing polycarbonate |
| Weight | 0.79 lbs., 0.96 lbs. when packed |
| 11.5 oz., 14 oz. when packed | |
| Approvals | |
| CE | As per EN-61000-3/4/6 and EN-61010-1 |
| LVDT Input Module | |
| Excitation Voltage | 24 V DC |
| Temperature Coefficient | ± 50 ppm/ °C of full scale (typ.) |
| LVDT Input | 1M input impedance |
| Analog to Digital | Dual scope 17 bipolar converter |
| Output Rate | 10 Hz averaged response outputs |
| Line Frequency Rejection | 50 or 60 Hz noise rejection |
| Relay Output Modules | |
| Four Relay Module | Available with four 5 A Form A Relays; 5 A 240 V AC, 4 A 24 VDC Isolation 3000 V. UL and CSA listed |
For DMI-D1 Single-Channel Indicator for DC LVDTs, with 120-220 V AC input power, four (4) independently programmable set points, four (4) 5 A Form A relays, 0-10 V DC analog output, and RS-232 serial port, order by Model Number:
DMI-D1-811
For DMI-D1 Single-Channel Indicator for DC LVDTs, with 120-220 V AC input power, four (4) independently programmable set points, four (4) 5 A Form A relays, 0-10 V DC analog output, and Ethernet port, order by Model Number:
DMI-D1-812
