FT651-059
7
③
Input Signal Use Example
PS2501(k)
6.8k
Controller internal circuit
３
４
D-Sub connector
＋
－
＋24V
External circuit
Ｅｘｔ Ｖｃｃ ＩＮ
Ｅｘｔ Ｖｃｃ ＣＯＭ
ＦＩＬ ＯＮ／ＯＦＦ ＩＮＰＵＴ
５
FIL ON/OFF input use example
Figure 2 Input Signal Use Example
（3）
Analog Output
When the B-A gauge is OFF, the crystal gauge outputs the measured pressure value
(however, when the B-A gauge protection is operating, an error is output). When the B-A
gauge is ON, it outputs the measured pressure value.
Analog signal pressure conversion equation
Pressure unit = Pa
V
out
= 0.6 x Log
10
(Press/133.33) + 6.875
←
→
Press/133.33 = 10
((Vout-6.875)/0.6)
Conversion table
Analog Output V
out
[V]
Error Content
< 0.4
Sensor error
> 9.5
Sensor error (at crystal gauge failure or when B-A gauge protection is
operating)
The lowest voltage output during pressure measurement (except when an error occurs) is
the value of the measured pressure lower limit value of each gauge (crystal gauge or B-A
gauge).
7
Replacing the Gauge Head
When replacing the gauge head, make sure that electric power is
stopped supplying or the remote connector is disconnected. There is a
risk of damaging the controller unit.
（1）
Detaching the Gauge Head
Loosen this M3 screw to
detach the gauge head
