IsoBlock V-4C Series Spec Sheet Datasheet by Verivolt LLC

650 Washington St, San Francisco, CA 94111
(708) 374-8658
The IsoBlock V module has been designed to provide high-quality isolated differential voltage mea-
surements for aplications requiring scaling of high voltages, as well as superior isolation.
Each IsoBlock V unit hosts four separate isolated channels, each of which can be connected to
separate measurement sources while providing a range of functional coverage up to 1500V. The
input of each specific IsoBlock channel has its own isolated reference, and can be configured to suit
user needs. All processed signals output from the IsoBlock unit are referenced in respect to the
ground channel of the user’s data acquisition system.
Verivolt designs its IsoBlock V modules with consideration for user great flexibility, high channel-
density and low power consumption.
IsoBlock V 50V 100V 200V 300V 500V 750V 1000V 1500V
Bandwidth (-3dB point) 120kHz (1MHz custom)
Integrated sensor noise
(Referenced to input) < 1 mV < 1 mV < 1 mV < 2 mV < 3 mV < 6 mV < 10 mV < 14mV
(Using 10V standard output voltage) 5 10 20 30 50 75 100 150
Differential input dynamic range 100V 200V 400 V 600 V 1000 V 1500 V 2000 V 3000 V
Channels per module 4
Accuracy (percentage of reading) ±0.2%
(±0.1% custom)
Max total phase shift at 60Hz < 0.05°
Max Input delay (120kHz versions) < 2.8 μs
Isolation voltage from primary side to
secondary side
> ±1500 V
Withstanding common mode surge
±5000 V
Withstanding differential mode surge
±2500 V
Mounting Type DIN Rail
Connectivity (Connector for power in
and signal out to/from the sensor)
Spring Cage con-
Outer Dimensions 3.9” x 3.5” x 2.5”
Channels 1 and 4 channels
Weight 198 g (7.0 oz)
Input-Output non-linearity < ±0.1%
Integrated channel noise
(Referenced to output) < 1.2 mV
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)
< ±500 µV
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
Ground t 5m m 1"! . .azsv Eusm CE
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.