Monarch Instrument F2A1X - Manual (Page 7)

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Connections and their functions are as follows:
+Vout Positive +5 or +10 Vdc (User selectable) to provide power to
optical, laser, infrared or amplified magnetic sensors. Maximum
load is 75 mA dc.
SIG IN Input signal from signal sources or speed sensor. Accepts
TTL pulses or ac signals, unipolar and bipolar, from +3 to
+12 Volts. Connect the signal wire from three wire sensors or
the positive side of two wire sources to this terminal. Typical
input impedance is 10 Kohms.
COM Common or Negative connection for both signal and power
from most sensors/sources.
Refer to the User Settings section for input option settings. Typical
connection for Monarch standard sensors is shown below:
Figure 2 Sensor Connection Detail
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4.0 USER PROGRAMMABLE SOFTWARE
SETTINGS
All the operational settings of the F2A1X
Frequency to Analog Module can be set remotely
using the PM Remote PC Software and the
optional User Programming Cable (UPC). This
cable plugs into the unit via the phone jack socket
below the SENSOR INPUT terminal block as
shown here and into a USB port on the PC.
Settings that can be programmed include input scaling, analog output full
scale and offset, input pulse polarity and update rate. In addition you can
view real time data on the PC – refer to the PM Remote manual and help
screen.