Yamatake Neosensor HTY7043, Инструкция по эксплуатации

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15 AB-6474
Never share AC transformer of humidity sensor.
CAUTION
•
Use insulated transformer to supply 24 V AC
power supply voltage. Never share 24 V AC
power supply with any other equipment. If a
transformer is shared, loop will be formed at
common and the sensor may be damaged.
Shared transformer (24 V AC power supply)
Figure 18. Shared transformer
Separate transformer (24 V AC power supply)
24 V DC power shared
(Model HTY7043TXXXX/HY7043TXXXX)
Figure 19. Separate transformers
Follow the next instructions to prevent an induction
current flowing from the humidity sensor to the controller
input circuit, or to prevent an influence of the generating
noise due to inadequate time constant of the controller.
•
Use a controller with a low pass filter (removal ratio of
40dB or higher in normal mode) for receiving signals.
•
Connect an isolator for the controller input circuit if a
removal ratio is not enough.
•
No problem will occur for connecting with a
Yamatake’s controller.
DC power supply can be shared
.
(Though loop is formed at common,
common mode noise affects a little.)
Correct
24 V DC
Temperature/humidity sensor
Temperature/humidity sensor
Multi-loop
controller
＋ ＋ ＋ ＋
⊥ ⊥ ⊥ ⊥
－ － － －
+
－ － － －
～ ～ ～ ～
⊥ ⊥ ⊥ ⊥
～ ～ ～ ～
+
－ － － －
+
+
－ － － －
－ － － －
Multi-loop
controller
The transmitter will
short through common
if transformer wiring is
incorrect.
Incorrect
Shared
common
line
24 V AC
＋ ＋ ＋ ＋
⊥
⊥ ⊥
⊥
＋
＋ ＋
＋
－ － － －
＋ ＋ ＋ ＋
－
－ －
－
＋
＋ ＋
＋ ～
～ ～
～
⊥ ⊥ ⊥ ⊥
Temperature/humidity sensor
～ ～ ～ ～
－
－ －
－
－ － － －
Temperature/humidity sensor
Loop is formed at common.
Incorrect
＋
＋ ＋
＋
＋
＋ ＋
＋
⊥ ⊥ ⊥ ⊥
－ － － －
＋
＋ ＋
＋
－ － － －
＋
＋ ＋
＋ ～
～ ～
～
⊥ ⊥ ⊥ ⊥
～
～ ～
～
－ － － －
－ － － －
24 V AC
Temperature/humidity sensor
Temperature/humidity sensor
Multi-loop
controller
Shared
common
line
No loop is formed at common.
Correct
＋ ＋ ＋ ＋
－ － － －
＋ ＋ ＋ ＋
－ － － －
～ ～ ～ ～
⊥ ⊥ ⊥ ⊥
～ ～ ～ ～
⊥ ⊥ ⊥ ⊥
＋ ＋ ＋ ＋
－ － － －
＋ ＋ ＋ ＋
－ － － －
24 V AC
24 V AC
Temperature/humidity sensor
Temperature/humidity sensor
Multi-loop
controller