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The M-7017RMS is an 8-channel differential AC input module that is used to convert the AC input signals to their True RMS DC values. The RMS input range can be from +150 mVrms to +10 Vrms, and each channel can be configured individually. The M-7017RMS is a complete, high-accuracy, RMS-to-DC converter that computes the True RMS DC value of any complex waveform. It also features 4 kV ESD protection, 2500 VDC intra-module isolation and ±35 VDC overvoltage protection.
| CPU Module | |
|---|---|
| Watchdog Timer | Module, Communication (Programmable) |
| Isolation | |
|---|---|
| Intra-module Isolation | 2500 VDC |
| EMS Protection | |
|---|---|
| EFT (IEC 61000-4-4) | ±4 kV for Power Line |
| ESD (IEC 61000-4-2) |
±4 kV Contact for Each Terminal ±8 kV Air for Random Point |
| Surge (IEC 61000-4-5) | ±0.5 kV for Power Line |
| LED Indicators | |
|---|---|
| Status | 1 x Power and Communication |
| Analog Input | |
|---|---|
| Channels | 8 Differential |
| Type | True RMS |
| Range |
0 ~ +10 Vrms, 0 ~ +5 Vrms, 0 ~ +1 Vrms, 0 ~ +500 mVrms, 0 ~ +150 mVrms |
| Resolution | 16-bit |
| Accuracy |
• Sinusoid: 50/60 Hz: ±0.15% of FSR 45 Hz to 10 kHz: ±0.5% of FSR • Non-Sinusoid: Crest Factor = 1 to 2: ±0.2% of FSR Crest Factor = 2 to 3: ±0.35% of FSR • DC: 0 ~ +10 V/0 ~ +5 V/0 ~ +1 V: ±0.3% of FSR 0 ~ +500 mV, 0 ~ +150 mV: ±0.7% of FSR |
| Sampling Rate | 10 Hz (Total) |
| Input Impedance | >2 MΩ |
| Overvoltage Protection | ±35 VDC |
| Individual Channel Configuration | Yes |
| COM Ports | |
|---|---|
| Ports | 1 x RS-485 |
| Baud Rate | 1200 ~ 115200 bps |
| Data Format | (N, 8, 1), (N, 8, 2), (E, 8, 1), or (O, 8, 1) |
| Protocol | Modbus RTU, DCON |
| Power | |
|---|---|
| Reverse Polarity Protection | Yes |
| Input Range | +10 ~ +30 VDC |
| Consumption | 0.9 W |
| Mechanical | |
|---|---|
| Dimensions (mm) | 72 x 123 x 35 (W x L x H) |
| Installation | DIN-Rail Mounting |
| Environment | |
|---|---|
| Operating Temperature | -25 ~ +75 °C |
| Storage Temperature | -40 ~ +85 °C |
| Humidity | 10 ~ 95% RH, Non-condensing |

The M-7017RMS is an 8-channel differential AC input module that is used to convert the AC input signals to their True RMS DC values. The RMS input range can be from +150 mVrms to +10 Vrms, and each channel can be configured individually. The M-7017RMS is a complete, high-accuracy, RMS-to-DC converter that computes the True RMS DC value of any complex waveform. It also features 4 kV ESD protection, 2500 VDC intra-module isolation and ±35 VDC overvoltage protection.
| CPU Module | |
|---|---|
| Watchdog Timer | Module, Communication (Programmable) |
| Isolation | |
|---|---|
| Intra-module Isolation | 2500 VDC |
| EMS Protection | |
|---|---|
| EFT (IEC 61000-4-4) | ±4 kV for Power Line |
| ESD (IEC 61000-4-2) |
±4 kV Contact for Each Terminal ±8 kV Air for Random Point |
| Surge (IEC 61000-4-5) | ±0.5 kV for Power Line |
| LED Indicators | |
|---|---|
| Status | 1 x Power and Communication |
| Analog Input | |
|---|---|
| Channels | 8 Differential |
| Type | True RMS |
| Range |
0 ~ +10 Vrms, 0 ~ +5 Vrms, 0 ~ +1 Vrms, 0 ~ +500 mVrms, 0 ~ +150 mVrms |
| Resolution | 16-bit |
| Accuracy |
• Sinusoid: 50/60 Hz: ±0.15% of FSR 45 Hz to 10 kHz: ±0.5% of FSR • Non-Sinusoid: Crest Factor = 1 to 2: ±0.2% of FSR Crest Factor = 2 to 3: ±0.35% of FSR • DC: 0 ~ +10 V/0 ~ +5 V/0 ~ +1 V: ±0.3% of FSR 0 ~ +500 mV, 0 ~ +150 mV: ±0.7% of FSR |
| Sampling Rate | 10 Hz (Total) |
| Input Impedance | >2 MΩ |
| Overvoltage Protection | ±35 VDC |
| Individual Channel Configuration | Yes |
| COM Ports | |
|---|---|
| Ports | 1 x RS-485 |
| Baud Rate | 1200 ~ 115200 bps |
| Data Format | (N, 8, 1), (N, 8, 2), (E, 8, 1), or (O, 8, 1) |
| Protocol | Modbus RTU, DCON |
| Power | |
|---|---|
| Reverse Polarity Protection | Yes |
| Input Range | +10 ~ +30 VDC |
| Consumption | 0.9 W |
| Mechanical | |
|---|---|
| Dimensions (mm) | 72 x 123 x 35 (W x L x H) |
| Installation | DIN-Rail Mounting |
| Environment | |
|---|---|
| Operating Temperature | -25 ~ +75 °C |
| Storage Temperature | -40 ~ +85 °C |
| Humidity | 10 ~ 95% RH, Non-condensing |
