Ransburg RCS 2 Ratio Control System - Manual (Page 25)

Pump Inlet Pressure
Type of Input: Channel
Type of Signal: Jumper Selectable
Factory Setting: 4-20 mA
This input is typically connected to a pressure
sensor located near the input of the pump. When
used in conjunction with a pilot operated fluid
regulator on the inlet of the pump, it minimizes
the differential pressure across the pump, thereby
increasing the accuracy of the pump.
Pump Outlet Pressure
Type of Input: Channel
Type of Signal: Jumper Selectable
Factory Setting: 4-20 mA
This input is typically connected to a pressure
sensor located near the output of the pump. This
is used to monitor and control the differential
pressure across the pump, thereby increasing
the accuracy of the pump.
This outlet pressure is also used as the feather
pressure for manual spray guns if an optional
feather pressure sensor is not used.
ANALOG OUTPUTS
Most of the analog outputs are jumper selectable
to be 0 to 10 VDC or 4-20 mA. Actual Flow, how-
ever, is fixed at 0-10 VDC.
Motor Speed
Type of Output: Channel
Type of Signal: Jumper Selectable
Factory Setting: 0-10 VDC
This output is connected to the analog input on
the servo motor controller located in the motor
amplifier panel. A 0 VDC signal tells the servo
controller to run at 0 RPM, a 10 VDC signal tells
it to run at the programmed maximum RPM for
that pump.
Pressure Control
Type of Output: Channel
Type of Signal: Jumper Selectable
Factory Setting: 0-10 VDC
This output is normally connected a voltage to
pressure transducer which converts a 0 to 10
VDC signal to a 0 to100 psi air pressure. The
pressure is then used to control the pilot port on
a fluid regulator. This fluid regulator is then used
to control the fluid inlet pressure of the pump.
Actual Flow
Type of Output: Gun
Type of Signal: 0-10 VDC
This output is 0 to 10 VDC output that is propor-
tional to the actual flow of material coming out
of the applicator. 0 VDC means no flow and 10
VDC indicates 2000 cc/min. (Therefore, 3.40 VDC
would indicate 680 cc/min.)
FREQUENCY INPUTS
All frequency inputs are optically isolated and
expect a maximum amplitude square wave of
24 VDC and a maximum frequency of 1.5 KHz.
Both sides of the optical isolators are accessible,
allowing the RCS-2 to sink or source any of the
frequency signals.
Motor Feedback
Type of Output: Channel
Type of Signal: Frequency
This signal is a square wave output from the servo
motor controller, indicating the actual speed of the
motor that is driving the pump. It is used by the
firmware to determine the current flow rate of the
material out of the pump. (It can alternately be
connected to the output of a flow meter placed in
the fluid stream.)
Solvent Flowmeter
Type of Output: Gun
Type of Signal: Frequency
This input allows users to connect a flowmeter
in the solvent supply line and collect totalization
data on solvent usage.
RCS-2 User Manual - Installation
22 LN-9407-00.2
Ransburg