Idex Pulsafeeder MPC Vector Installation, Operation & Maintenance Manual page 32

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.
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.
Figure 5-11– Sample Analog Input Connections
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