Documentation
Product Details
Four-Channel Isolated Differential Voltage Sensor
The IsoBlock V-4c delivers four synchronized, galvanically isolated voltage measurement channels in a single compact module. Each of the four independent channels measures differential voltages from ±10mV to ±1500V with factory-synchronized timing, selectable accuracy: standard ±(0.2% of reading + 0.005% of range) for industrial applications, or precision ±(0.1% of reading + 0.005% of range) for validation and metrology work. The module outputs four independent differential ±10V signals (±5V custom option) with 100kHz bandwidth (100-300kHz custom option available), capturing both DC and AC components on all channels simultaneously.
Four Independent Synchronized Channels
The V-4c provides four isolated measurement channels, each with its own galvanic isolation rated for ±1500V sustained (±5000V peak transient tolerance). Channel-to-channel isolation prevents cross-talk between measurement points, while primary-to-secondary and signal-to-power isolation create complete barriers between your measurement sources and electronics. Synchronized acquisition across all four channels enables multi-point voltage monitoring without timing skew, critical for energy storage systems monitoring multiple battery strings, three-phase power systems, or solar arrays with 4+ parallel strings.
Non-Invasive Four-Channel Measurement
Each channel's input impedance scales with voltage range: 440kΩ (±5-30V), 2MΩ (±50-300V), and 8MΩ (±500V-1500V). At maximum voltage, each of the four channels draws less than 0.2µA—ensuring all four simultaneous measurements remain transparent to the measured circuits. This non-invasive approach is critical for energy storage systems where parasitic current draw from battery strings compromises system efficiency, or solar arrays where any measurement current reduces available power output. All four channels combined consume negligible power from measurement sources, preserving energy in battery-critical applications.
Compact Multi-Channel DIN Rail Integration
The V-4c's 3.9" DIN rail footprint with four independent isolated channels reduces panel space and integration complexity compared to four single-channel modules. Spring cage connectors accept 20-6 AWG twisted pair cable from measurement sources to DAQ inputs. Low output impedance (20Ω per channel) supports 100+ meter cable runs to remote DAQ equipment without signal degradation or buffering. For test engineers and systems integrators, this translates to faster setup time, lower material costs, and simplified troubleshooting.
Future-Proof Analog Architecture
The IsoBlock V-4c outputs differential ±10V (not current loops) maintaining resolution independence from the measurement instrument. A 16-bit DAQ system captures 16-bit resolution per channel; upgrading to 24-bit hardware in future projects automatically provides 24-bit resolution on all four channels with the same
V-4c module, no recertification required. Synchronized multi-point measurement captures voltage relationships—phase angles, transient coupling, efficiency losses—impossible with sequential single-channel or time-multiplexed acquisition.
Electrical Performance & Certification
Power consumption: 4W continuous with excellent temperature stability (±50 ppm/°C gain drift, -25°C to +70°C operating range). Input-to-output linearity is <±0.04% per channel, enabling high-fidelity waveform capture across all amplitude levels. Common mode rejection reaches 112 dB @ 60Hz, suppressing ground noise and AC interference even in electrically noisy industrial environments
Frequently Asked Questions
We use “V” to denote peak voltage values, and “VAC” to denote RMS voltage values. The RMS-to-peak conversion factor is √2, approximately 1.42 (Vpeak = Vrms × √2 ≈ Vrms × 1.42)
For example, if a sensor specifies an input and output range of 100 VAC to 7 VAC, this means:
- It accepts an input of 100 Vrms, which equals approximately 142 Vpeak
- It outputs 7 Vrms, which equals approximately 10 Vpeak
