NK TECHNOLOGIES VTU Series Instructions

Specifi cations
Power Supply 24 VAC/VDC External Power
(22-26 VAC or VDC), <4 VA
Power supply is isolated from
monitored circuit and output signal
Use Class 2 power supply
Voltage Measurement 0-800, 1000 or 1200 VAC or VDC
Output Signal 4–20 mA (capped at 24 mA max)
0-5 VDC
0-10 VDC
Response Time 100 ms (to 90% value)
Accuracy < 1% Full Scale
Linearity < 0.5%
Output Loading 4-20 mA: <400 Ω
0-5/0-10 VDC >100 KΩ
Isolation Voltage UL listed to 4700 VAC
Frequency Range 0-400 Hz
Enclosure UL94 V-0 Rated
Environmental -4 to 140°F (-20 to 60°C)
0–95% RH Non-condensing
Pollution Degree 2
Altitude to 2000 meters (6561 ft)
Listings UL/cUL, CE
For products intended for the EU market, the following is ap-
plicable to the CE compliance of the product:
The VTU-OS series are designed to comply with EN 61010-1
CAT III 1000 V max measurement category. Power source over-
voltage category I as defi ned per EN 61010-1.
Warning! Risk of danger
Safe operation can only be guaranteed if the
transducer is used for the purpose for which it
was designed and within the limits of the techni-
cal specifi cations. When this symbol is used,
it means you must consult all documentation to
understand the nature of potential hazards and
the action required to avoid them.
Warning! Risk of electrical shock
When operating the transducer certain parts may
carry hazardous live voltage (e.g. primary con-
ductors, power supply). The transducer should
not be put into operation if the installation is not
complete.
Model Number Key
VTU 10 - 420 - 24U - OS
CASE STYLE:
OS - DIN rail compatible
POWER SUPPLY:
24U - Nominal 24 VAC/VDC
OUTPUT:
420 - 4-20 mA
005 - 0-5 VDC
010 - 0-10 VDC
VOLTAGE INPUT RANGE:
8 - 800 V
10 - 1000 V
12 - 1200 V
SENSOR TYPE:
VTU - AC/DC Voltage Transducers
Know Your Power
Other NK Technologies Products Include:
AC & DC Current Transducers
AC & DC Current Operated Switches
1 & 3Power Transducers
Current & Potential Transformers (CTs & PTs)
3511 Charter Park Drive, San Jose, CA 95136
Phone: 800-959-4014 or 408-871-7510
Fax: 408-871-7515
sales@nktechnologies.com, www.nktechnologies.com
INSTRUCTIONS
VTU SERIES
AC/DC Voltage Transducers
Ranges 800, 1000 and 1200 Volts
4-20 mA, 0-5/10 VDC Outputs
Quick "How To" Guide
1. Ensure correct sensor model was chosen for Input Volt-
age of application.
2. Mount the sensor to a DIN rail using integrated mounting
clip on backside of transducer or secure using the tabs
in each corner.
3. Connect monitored voltage (2) & (1) using 22-16 AWG
copper wires insulated to 75/90°C. Lift the orange clip
on the terminal, insert wire and allow it to clamp on the
stripped end of the wire.
Refer to "Output Wiring" section for voltage and imped-
ance recommendations.
4. Connect 24 VAC or VDC power supply using 22-12
AWG copper wiring rated 75°C minimum and tighten
to 6 in-lbs torques to terminals 3-4.
5. Connect output to the load using terminal 6 for the posi-
tive signal, and terminal 5 to common or ground.
6. Energize primary circuit and sensor power.
292180014 Rev 3