Specifications

153
Transducers
Handling
T-51/T-101 Series
Wiring
Connection work is to be performed by a person with the
proper technological expertise.
Connections must be made correctly and securely.
Be careful because erroneous wiring not only causes
malfunctions and damages equipment, but may also
spread problems to other power equipment.
As the lead wires for connecting the output and load of
a transducer, use two-core shielded wires or twisted-
pair wires to prevent malfunction and failure due to
transmission noise and disturbance surge. If the
transmission distance exceeds 100m, current output
specifications; for example, 4~20mA DC are
recommended.
Do not bring the output line close to or bundle it
together with other power lines and the input lines (i.e.,
VT, CT and auxiliary power supply).
Although the H Series, S Series, instrumentation and
peripheral transducers are provided with auxiliary power
supply terminals, if the voltage of the measured circuit is
comparatively stable and within the allowable range of
the auxiliary power supply, the voltage can be supplied
from the measured circuit (VT secondary side).
However, if the voltage of a generator is supplied from
the measured circuit, the transducer output may
fluctuate when the voltage during operation such as
starting or stopping of the generator falls below the
rated value.
Ground the shield line of a shielded cable on the
receiving side.
However, depending on the circumstances of external
noise, it may be better to ground it on the transducer
side.
Transducer
Receiving-side
machine
Output line
Earth
 Connecting the input line
For temperature transducers, isolators, DC level
transducers or other transducers that handle minute input
signals, arrangements must be made to prevent
interference such as noise and surge in the input line.
For input lines such as these, in order to prevent incorrect
operation and failure due to transmission or noise
interference, please use shielded or twisted cables.
Additionally, avoid installation alongside power lines or
other noise sources as well as pairing different input lines
with each other and other lines as shown below.
Sensor
Resistance bulb
Temperature transducer
A
B
C(b)
A
B
C(b)
<Example of erroneous pairing>
Sensor
Resistance bulb
Temperature transducer
A
B
C(b)
A
B
C(b)
<Example of correct pairing>