Appendix A
309738L
83
Analog Inputs
The PrecisionFlo LT receives a flow rate or pressure
analog command from the automation. The 0 to 10 VDC
analog input is referenced to analog common on the
control board. See F
. 35. The reference for the auto-
mation controller analog output must be connected to
the PrecisionFlo LT analog reference (pin 8) for this sig-
nal to function properly. If this reference connection is
not possible an analog isolator must be used.
Analog Outputs
The PrecisionFlo LT provides a flow rate (tach) signal for
use in the automation. The 0 to 5 VDC analog output is
referenced to analog common on the control board. See
F
. 36. The reference for the automation controller ana-
log output must be connected to the PrecisionFlo LT
analog reference (pin 8) for this signal to function prop-
erly. If this reference connection is not possible an ana-
log isolator must be used.
24 VDC From E-Stop
The PrecisionFlo LT provides a signal that can be used
by the automation controller to monitor the emergency
stop switch position of the PrecisionFlo LT controller.
See F
Relays
If the use of relays is required to condition the digital I/O
signals, these are some examples of part numbers that
could be used.
For 24 VDC Coils:
•
Relay: IDEC Part # RH1B-UDC24V
•
Socket (DIN Rail): IDEC Part # SH1B-05
•
Spring: IDEC Part # SY2S-02F1
For 120 VAC Coils:
•
Relay: IDEC Part # RH1B-UAC120V
•
Socket (DIN Rail): IDEC Part # SH1B-05
•
Spring: IDEC Part # SY2S-02F1
F
IG
. 35
F
IG
. 36
F
IG
. 37
