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 flat surface.
Description
Installation
Output Wiring
VTD-BD Series Voltage Transducers are designed to moni-
tor 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-BD is
available with +/-5 or +/-10 VDC output options, so it will
produce a signal proportional to the voltage when the DC
voltage polarity is standard or reversed.
1. Transducer has no output
A. Power supply is not properly sized. Check power supply
voltage and output rating. Each transducer requires less
than 2VA to operate.
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 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 5/10VDC
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 (1) and
(2) on transducer using up to 16 AWG copper wires. Lift
the orange clip, insert the stripped wire and release the clip.
Proper torque will be applied.
POWER SUPPLY
OUTPUT SIGNAL
+/-0-5VDC
+/-0-10VDC
(1)
(2)
(6)(5)(4)
(3)
Monitored Voltage
GROUND
GREEN LED
POWER ON
V2 V1
Use twisted pair for power supply 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, depending on the primary voltage polarity.
Connect control or monitoring wires to the sensor. Use up to
14 AWG copper wire insulated to 75/90°C and tighten termi-
nals 3-6 to7 inch-pounds torque.
+FS-FS
Output
Monitored Voltage Range
Bidirectional Output
0% +100%-100%
+10V
-10V
0V
+5V
-5V
0V
With positive of the monitored voltage at-
tached to terminal one, the output will be
positive. With negative attached to terminal
one, the output will be negative.
