4-6 I/O Connections and Communication 5700512-C
Advanced Energy
®
Table 4-2. 9-pin connector signal descriptions
Pin Signal
Name
Signal Description
1 VALVE
OPEN/
CLOSED
This signal controls the position of the control
valve and allows you to use the purge function on
the MFC.
• Open = Common or +15 VDC
• Closed = -15 VDC
• Normal = Floating
For more information, see “Control Valve Purge
Function Signals” on page 4-8.
Note: Complete shut off of a gas cannot be
achieved by the control valve of an MFC.
2 OUTPUT Analog flow output signal. The signal range is
0 VDC to 5 VDC:
• 0 VDC = 0%
• 5 VDC = 100% of full-scale flow
3 +15 VDC For specifications on this signal, see the supply
power section of the specifications table for the
specific MFC model (see “Model Specifications”
on page 6-1).
4 POWER
COMMON
Common line that carries the majority of the MFC
operating current.
Note: POWER COMMON (pin 4) and SIGNAL
COMMON (pins 7 and 8) must be connected
at the power supply.
5 -15 VDC For specifications on this signal, see the supply
power section of the specifications table for the
specific MFC model (see “Model Specifications”
on page 6-1).
6 SET POINT Analog flow control signal. The signal range is
0 VDC to 5 VDC:
• 0 VDC = 0%
• 5 VDC = 100% of full-scale flow
7 SIGNAL
COMMON
Return for control signals.
Note: POWER COMMON (pin 4) and SIGNAL
COMMON (pins 7 and 8) must be connected
at the power supply.
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