IsoBlock V-1c Spec Sheet Datasheet by Verivolt LLC

650 Washington St, San Francisco, CA 94111
(708) 374-8658
The IsoBlock V-1c has been designed to provide high-quality isolated differential voltage measure-
ments for aplications requiring scaling of high voltages, as well as superior isolation.
Each IsoBlock V unit hosts an isolated channel that can be connected to separate measurement
sources while providing a range of functional coverage up to 1500V. The input has its own isolated
reference, and can be configured to suit user needs. The output signal from the IsoBlock unit is
referenced in respect to the ground channel of the users data acquisition system.
Verivolt designs its IsoBlock V modules with consideration for user great flexibility, and low power
IsoBlock V 50V 100V 200V 300V 500V 750V 1000V 1500V
Bandwidth (-3dB point) 1MHz
(Using 10V standard output voltage) 5 10 20 30 50 75 100 150
Differential input dynamic range 50V 100V 200 V 300 V 500 V 750 V 1000 V 1500 V
Channels per module 1
Accuracy (percentage of
(±0.1% Custom)
Max total phase shift at 60Hz < 0.05°
Max Input delay (120kHz
< 2.8 μs
Isolation voltage from primary
side to secondary side
> ±1500 V
Withstanding common mode
surge voltage
±5000 V
Withstanding differential mode
surge voltage
±2500 V
Mounting Type DIN Rail
Connectivity (Connector for
power in and signal out to/
from the sensor)
Spring Cage connector
Outer Dimensions 1.4” x 3.5” x 2.5”
Channels 4 and 8 channel options
Weight 198 g (7.0 oz)
Input-Output non-linearity < 130 ppm
Output voltage ±10 V
Gain temperature drift ±50 ppm/°C
Common mode rejection
at 60Hz
112 dB
Power Supply Voltage 8V to 28 V
Output type Differential pair
Output Offset Voltage
(Referenced to output)
2σ < ±500 µV (typical)
4σ < ±1 mV (limit)
Differential Input
> 10 MΩ
Insulation impedance > 10 GΩ || 2pF
Output impedance 100Ω
Operating temperature – 25 to 70 °C
Storage temperature – 40 to 80 °C
- The isolation barrier of every device is tested with a 5 second partial discharge of 1800V for 5 seconds, with a detection threshold
of 150pC.
- Withstanding common mode surge voltage is 2 seconds half sinewave.
- Withstanding differential mode surge voltage is 4 seconds half sinewave.
IsoBlock V single channel block diagram.
The IsoBlock V module is designed to isolate and scale down
high voltages found in industrial enviroments. The end result is
a signal ready to connect to any data acquisition system, while
galvanically isolating the source from it.
Each channel of the IsoBlock module has a galvanic isolation
from the input to the output that can eliminate large common
mode voltages. In addition to that, each channel also has a pro-
tection stage at the input that guards it from surges.
Following the input surge protection stage, there is an amplifica-
tion stage that brings the input signal to a ±10V range. This signal
is modulated into a magnetic field, and then transferred across a
galvanic barrier. A demodulating stage recovers the original sig-
nal, followed by an anti-aliasing filter and a conditioning stage to
output a ±10V differential pair. The figure below shows a block
diagram of the process decribed above.
IsoBlock V
Galvanicaly Isolated Differential Voltage Sensor
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THIS SENSOR IS NOT A SAFETY DEVICE AND IS NOT INTENDED TO BE USED AS A SAFETY DEVICE. This sensor is designed only to detect and read certain data in an elec-
tronic manner and perform no use apart from that, specifically no safetyrelated use. This sensor product does not include self-checking redundant circuitry, and the
failure of this sensor product could cause either an energized or de-energized output condition, which could result in death, serious bodily injury, or property damage.
● CE
Standards and Certifications
C. Securely connect one end of a
twisted pair to the output terminals,
and the other end to the inputs of your
data acquisition unit
B. Securely connect wire in the 20-6
AWG range between the source of
measurement and an available IsoB-
lock’s input screw terminal.
A. Connect external power source
to power the unit. For proper function-
ing the power supply should provide a
voltage between 8V and 28V with at
least 0.25A of continuous current and
0.5A surge during module start-up.