Filter
Top Products
Chapter 2 Installation Series 830/840/860 Instruction Manual
2-12 IM-83/84/86-H
Input Signal Connections (Controllers Only)
A 0-5 VDC (4-20 mA optional) set point command input signal al-
lows you to set the flow to any desired value within the range of
the controller. The set point input signal is a direct linear represen-
tation of 0 to 100 percent of the controller’s mass flow full scale
value.
For 0–5 VDC set point control, connect a manual-adjust potentiome-
ter as shown below. Any potentiometer value between 5K and 100K
may be used but is limited to a VDC input signal only. For 4-20 mA
or 0–5 VDC set point control, use a PLC or other digital device.
If the set point input is not connected to some type of control device,
the valve on/off switch must be activated in the off position. If no set
point command is present on the controller when powered-up and
the valve is not switched off, the valve will drift wide open.
Figure 2-11.
Local Command Set Point Potentiometer (15-Pin D-Connector)
Figure 2-12.
External Command Set Point Source (15-Pin D-Connector)
Note: Use 15 VDC maximum to produce a 4-20 mA setpoint signal.