5
5. Connector
Connector type : D-Subminiature 9-pin connector(M3 fitting screw type)
Connector Pin Connections List
PIN No.
Signal
1
Valve opening/closing input *1
2
Flow rate output 0 to 5 VDC
(Min. load resistance 2k
Ω
)
3 +15VDC
Power
4
Power COMMON *2
5 -15VDC
Power
6
Setting input 0.25 to 5 VDC *1
(Input impedance 1M
Ω
or more)
7
Signal COMMON *2
8
Valve test point *1,*3
9 N.C.
*4
*1:N.C.(no connection) for SEF-E431X/E441X.
*2:In order to prevent COMMON voltage fluctuations due to a valve drive current, the power
COMMON terminal(Pin No.4) and signal COMMON terminal(Pin No.7) shall be
connected on the power supply side. Since they are not connected inside the MFC, be sure
to wire them separately and make them common on the power supply side.
*3:The valve test point(Pin No.8) is the terminal to monitor the voltage applied to the valve.
*4:No connection
*5:In order to prevent noise influence, use shielded cable.
