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5.3.3.7 Analog
Input Wiring Example
Analog inputs require a loop powered (current sourcing) transmitter capable of driving a minimum 250
ohm resistive load. The transmitter maybe a two wire or three wire type. The analog inputs are not
isolated. Some installations may require an analog input isolator. See
Figure 5-11– Sample Analog
Input Connections
below for wiring details.
5.3.3.7.1 Flow Meter (Analog Input 2)
Analog input 2 is dedicated for flow meter based systems. The analog input is use to provide a 4-20
mA flow feedback signal in order to provide closed loop flow control.
5.3.3.7.2 Set point (Analog Input 1)
Analog input 1 is dedicated as a user set point input. The analog input is used to command speed
(which is proportional to flow) in open loop systems and flow rated for closed loop systems.
Figure 5-11
– Sample Analog Input Connections
5.3.3.8 Analog
Output Example Wiring
The MPC Vector provides internally powered two wire 4-20 mA transmitter which outputs speed. The
output is capable of driving a 300 ohm load maximum. See
Section 7.3 Analog Output Setup
for
configuration details.
Содержание Pulsafeeder MPC Vector
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