NK TECHNOLOGIES VTD-BD Series User manual

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 to input terminals (2) & (1)
and output wiring using 22-16 AWG copper wires insu-
lated to 60/75°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.
IMPORTANT: Monitored voltage (V1/V2) polarity sensi-
tive for output polarity.
4. Connect 24 VAC or VDC power supply fused to 5 amp
using 22-12 AWG copper wiring rated 60/75°C and
tighten to 6 in-lbs torque to terminals 3-4 (not polarity
sensistive).
5. Connect output to the load using terminal 6 for the output
signal, and terminal 5 to common
6. Energize primary circuit and sensor power.
VTD 1 - 010 - 24U - BD - OS
OUTPUT:
005 - +/-5 VDC
010 - +/-10 VDC
VOLTAGE INPUT RANGE:
0 - 15 VDC
1 - 25 VDC
2 - 50 VDC
3 - 150 VDC
4 - 300 VDC
5 - 600 VDC
SENSOR TYPE:
VTD - DC Voltage Transducers
Model Number KeySpecifi cations
Quick “How To” Guide
OUTPUT TYPE:
BD - Bidirectional
POWER SUPPLY:
24U - 24 VAC/VDC
292180021 Rev 3
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)
External Power Supply 24 VAC/ VDC (22-26 V)
Power Consumption <2 VA Use Class 2 power supply
Voltage Measurement 0-15, 25, 50, 150, 300 or
600 VDC
Input Impedance >160 KΩ
Output Signal +/-5 VDC
+/-10 VDC
Response Time 500 mS (10% to 90% value)
Accuracy < 1% Full scale
Output Loading >10 KΩ for stated accuracy
Isolation Voltage UL listed to 2200 VAC
Frequency Range DC only
Enclosure UL94 V-0 Rated
Use copper conductors only.
Environmental -4 to 122°F (-20 to 50°C)
0–95% RH Non-condensing
Pollution Degree 2
Altitude to 2000 meters (6561 ft)
Listings UL/cUL, CE
Warning! Risk of danger
Safe operation can only be guaranteed if the
transducer is used for the purpose for which is
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.
For products intended for the EU market, the following is ap-
plicable to the CE compliance of the product:
The VTD-BD series are designed to comply with EN 61010-1
CAT III 600V max measurement category. Use 24 V input power
and fuse at max 5 amps. Power source overvoltage category I as
defi ned per EN 61010-1
VTD-BD SERIES
Bidirectional DC Voltage Transducers
+/-5 or +/-10 VDC Output
INSTRUCTIONS
HOUSING:
OS - Oval DIN Mtg.
3511 Charter Park Drive, San Jose, CA 95136
Phone: [phone] or 408-871-7510
Fax: [phone]
[e-mail], www.nktechnologies.com

VTD-BD transducers feature a DIN rail compatible enclo-
sure and are typically located in the same environment as
motors, contactors, heaters, pull-boxes, and other electrical
enclosures.
To mount on DIN rail: Orient transducer so that line volt-
age terminals (1) and (2) are upright/on top of unit and snap
securely onto DIN rail. To remove, insert small screwdriver
into the slots and pry the two mounting springs down until
unit dislodges from DIN rail.
To mount using screws: Insert screws and mount to back
plane or other suitably fl at surface.
Description
Installation
Output Wiring
VTD-BD Series Voltage Transducers are designed to
monitor DC voltage and detect conditions where monitored
supply voltage is above or below normal. Detecting such
conditions helps users to avoid problems commonly associ-
ated with voltage irregularities such as motor overheating,
brownouts and conductor failure or poor connections. The
VTD-BD is available with +/-5 or +/-10 VDC output op-
tions, so it will produce a signal proportional to the voltage
when the DC voltage polarity is standard or reversed.
1. Transducer has no output
Power supply is not properly sized. Check power supply
voltage and output rating. Each transducer requires
less than 2 VA to operate.
2. Output signal too low or too high
Transducer model improperly sized for application. De-
termine the normal operating voltage of your monitored
circuit and ensure transducer selected has a range equal
to or slightly higher than the normal operating voltage.
3. Sensor output is always at zero voltage:
Primary circuit is not on. Check that the monitored
voltage is actually switched on, and that any fuses used
are intact.
4. Sensor is always at or 5/10 VDC
Voltage is higher than transducer range. Select a higher
range product.
Troubleshooting Tips
Line Voltage Wiring Connection
CAUTION: TO AVOID ANY POTENTIAL FOR SHOCK
OR SAFETY HAZARD, ENSURE LINE VOLTAGE IS
DISCONNECTED AT SOURCE BEFORE WIRING TO
UNIT.
Connect input voltage to be monitored to input terminals
(1) and (2) on transducer using 22-16 AWG copper wires.
Lift the orange clip, insert the stripped wire and release the
clip. Proper torque will be applied.
Note: Voltage output will be linear in the same manner,
with zero at zero primary voltage and +/-5 or +/-10 VDC
at the full range measured voltage, depending on the
primary voltage polarity.
Connect control and monitoring wires to the sensor. Use
22-12 AWG copper wire insulated to 60/75°C and tighten
terminals 3 through 6 to 6 inch-pounds torque. Terminals
1 and 2 are self tightening.
With positive of the monitored voltage attached to
terminal one, the output will be positive. With negative
attached to terminal one, the output will be negative.
292180021 Rev 3