NK TECHNOLOGIES VTD Series User manual

INSTRUCTIONS
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.
3. Connect input voltage -(5) & +(6) and output wiring
using up to 22-12 AWG copper conductors only insu-
lated to 75°C minmum and tighten to 6-in lbs. Refer
to “Output Wiring” section for voltage and impedance
recommendations.
4. Connect 24 VAC or DC power supply fused to 5 A to
terminals 3-4.
Do not connect power supply and signal circuits together.
There is no isolation.
VTD SERIES
DC Voltage Transducers
Ranges 15, 25, 50, 150, 300 and 600 Volts
4-20 mA, 0-5/10 VDC Outputs
VTD 1 - 420 - 24U - DIN
OUTPUT:
420 - 4-20 mA
005 - 0-5 VDC
010 - 0-10 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
CASE STYLE:
DIN - DIN rail compatible
POWER SUPPLY:
24U - Nominal 24 VAC/VDC
3511 Charter Park Drive, San Jose, CA 95136
Phone: [phone] or 408-871-7510
Fax: [phone]
[email protected], www.nktechnologies.com 292182001 Rev 9
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)
Power Supply 24 VAC/VDC External Power
A fuse rated maximum 5 A shall be
placed in series with the main input,
24 VDC, power terminal.
(20-45 VDC, 22-38 VAC), <2 VA
Power and output are not isolated. Do not connect together.
Input Range: Input 15 V: 25 KΩ, 25 V: 42 KΩ,
Impedance 50 V: 82 KΩ, 150 V: 250 KΩ,
300 V: 500 KΩ, 600 VDC: 1.00 MΩ
Output Signal 4-20 mA (capped at 24 mA max)
0-5 VDC (capped at 5.75 VDC)
0-10 VDC (capped at 11.5 VDC)
Response Time 250 ms (to 90% of step change)
Accuracy < 1% Full Scale
Linearity < 0.5%
Output Loading 4-20 mA: < 500 ohm
0-5/10 V: > 10 K ohm
Isolation Voltage 2200 VAC
Frequency Range DC
Enclosure UL94 V-0 Rated
Environmental Operating Temp.
-4 to 140°F (-20 to 60°C)
0–95% RH, Non-condensing
Pollution Degree 2
Altitude to 6561 ft (2000 meters)
Listings UL/cUL listed, CE
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.
For products intended for the EU market, the following is ap-
plicable to the CE compliance of the product:
The VTD series comply with EN 61010-1 CAT III 600 V max
measurement category. Power source overvoltage category I as
defi ned per EN 61010-1

Description
Installation
Output Wiring
VTD Series Voltage Transducers are designed to monitor
DC voltage and detect conditions where supply voltage is
above or below normal. Detecting such conditions helps
users to avoid problems commonly associated with voltage
irregularities such as motor overheating, brownouts and
conductor failure or poor connections. The VTD is available
with 4-20 mA, 0-5 or 0-10 VDC output options.
1. Transducer has no output
A. Power supply is not properly sized. Check power
supply voltage and output rating. Each transducer
requires less than 2 VA to operate.
B. Polarity is not properly matched. Check and correct
wiring polarity.
2. Output Signal Too Low or Too High
Transducer model improperly sized for application.
Determine the normal operating voltage of your
monitored circuit and ensure transducer selected is
equal to or slightly higher than the normal operating
voltage.
3. Sensor is always at 4 mA (or zero voltage)
Primary circuit is not DC or is not on. Check that the
monitored load is DC and that it is actually on.
4. Sensor is always at 20 mA (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 terminals -(5) and +(6)
on transducer using up to 22-12 AWG copper conductors only
and tighten terminals to 6 inch-pounds torque.
Transducer Output vs. Input Voltage
Do not connect the power supply and output signal to-
gether. There is no isolation.
Use twisted pair for signal output conductors for full com-
pliance with CE directives.
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.
Connect control or monitoring wires to the sensor. Use
up to 22-12 AWG copper conductor only insulated to
75°C minimum and tighten terminals to 6 inch-pounds
torque.
5/10 VDC
0 VDC
Note: No isolation between power supply
and output signal connections.
VTD transducers feature a 35mm wide DIN rail compatible
enclosure and are typically located in the same environment
as motors, contactors, heaters, pull-boxes, and other electri-
cal enclosures.
To mount on DIN rail: Orient transducer so that line volt-
age terminals 5 and 6 are upright/on top of unit and snap
securely onto DIN rail. To remove, insert small screwdriver
into the lower mounting hole of the spring loaded clip, and
push the handle end of the screwdriver toward the sensor
base to release the tension on the rail.
To mount using screws: Insert screws and mount to back
plane or other suitably fl at surface.
292182001 Rev 9
2.5/5 VDC
25.0
20.0
15.0
12.0
10.0
5.0
0.0
4.0