The AC RMS input transmitter and signal conditioner provides six voltage input ranges and four current input ranges, all factory calibrated and jumper selectable. A special 5.000A range utilizes a built-in 0.01 ohm shunt to accept the output of 5A current transformers, with no need for a stepdown transformer. The current readings can easily be scaled digitally as needed. High common mode rejection allows stable readings with current shunts located on the high side of the line. Digital filtering is selectable for noisy signals.
True RMS precision circuitry is used to determine the root-mean-square of complex waveforms from DC to 10 kHz. Spikes up to 3.0 times the maximum of each range are accurately measured.
Accuracy to 0.03% of full scale for signals from DC to 15 kHz and signal amplitude down to 0. The crest factor (Vp / Vrms) is 3.0 at full scale, increasing to 300 for a signal amplitude of 1% of full scale.
True RMS readings in as little as one 50/60 Hz AC line cycle are unmatched in the industry. Such a high read rate allows anomalies to be detected and alarmed before they become expensive problems. On/off control and alarm can be achieved dual solid state relays, which are standard. Transmitter can also capture peak and valley for times as short as one 50/60 Hz AC power line cycle.
AC or DC coupling is jumper selectable. AC coupling accommodates signals from 10 Hz to 15 kHz and is suitable for applications such as measuring the ripple on a DC power supply. DC coupling accommodates signals from 0 Hz to 15 kHz. Multiple integral cycles are averaged for signals above 50/60 Hz. A single cycle is captured for signals from 3 Hz to 50/60 Hz. Below 3 Hz and at DC, the capture rate is every 333 ms.
Standard features of LTE transmitters and signal conditioners include:
Discovery and configuration of Ethernet Nodes is easily achieved with TDM's Node Manager Software, and the discovered transmitters can then be programmed using TDM's Instrument Setup Software. Both softwares run on a PC under MS Windows and can be downloaded from this website at no charge.
|Analog Input||Range||Resolution||Input Ohms||Error at 25°C|
0-100% of FS, 10 Hz to 15 kHz
(AC coupling) or DC to 15 kHz
|200.00 mV||10 µV||22 MΩ||0.03% FS ± 2 cts|
|2.0000 V||100 µV||1 MΩ||0.03% FS ± 2 cts|
|20.000 V||1 mV||1 MΩ||0.03% FS ± 2 cts|
|200.00 V||10 mV||1 MΩ||0.03% FS ± 2 cts|
|600.0 V*||100 mV||1 MΩ||± 0.8 V|
|300.0 V||100 mV||1 MΩ||± 0.8 V|
0-100% of FS,
10 Hz to 15 kHz (AC coupling)
or DC to 15 kHz (DC coupling)
|2.0000 mA||0.1 µA||100 Ω||0.03% FS ± 2cts|
|20.000 mA||1 µA||10 Ω||0.03% FS ± 2cts|
|200.00 mA||10 µA||1 Ω||0.03% FS ± 2cts|
|5.000 A||1 mA||0.01 Ω||± 20 mA|
|* Range not ETL certified|
|Analog Output (standard)|
|Output Levels||0-20 mA or 0-10 Vdc (selectable)|
|Compliance, 4-20 mA||10V (0-500Ω load)|
|Compliance, 0-10V||2 mA (5 kΩ load)|
|Output Resolution||16 bits (65,536 steps)|
|Output Accuracy||0.02% of output span plus conversion accuracy|
|Output Isolation||250V rms working, 2.3 kV rms per 1 minute test|
|Ethernet Data I/O (standard)|
|Type||10/100 Base-T Ethernet per IEEE 802.3|
|Data Rates||300, 600, 1200, 2400, 4800, 9600, 19200 baud|
|Output Isolation||250V rms working, 2.3 kV rms per 1 min test|
|Serial Protocols||Modbus TCP, Modbus RTU, Modbus ASCII, TDM ASCII|
|Modbus Compliance||Modbus over Serial Line Specification V1.0 (2002)|
|Digital Addresses||247 for Modbus, 31 for TDM ASCII|
|Dual Relay Output (standard)|
|Relay Type||Two solid state relays, SPST, normally open, Form A|
|Load Rating||120 mA at 140 Vac or 180 Vdc|
|Standard Power||85-264 Vac or 90-300 Vdc|
|Low Power Option||10-48 Vdc or 12-32 Vac|
|Power Frequency||DC or 47-63 Hz|
|Power Isolation||250V rms working, 2.3 kV rms per 1 min test|
|Power Consumption||2 Watts|
|Dimensions||129 x 104 x 22.5 mm case|
|Mounting||35 mm rail per DIN EN 50022|
|Signal & Power||Detachable screw-clamp connectors|
|Operating Temperature||0°C to 55°C|
|Storage Temperature||-40°C to 85°C|
|Relative Humidity||95% at 40°C, non-condensing|
|Cooling Required||Mount transmitters with ventilation holes at top and bottom. Leave 6 mm (1/4") between transmitters, or force air with a fan.|
* For purposes of accuracy calculation, the full scale range for the 200V and 600V scales is 2000V (20,000 counts), and the full scale range for the 5A scale is 20A (20,000 counts).