Hamilton Sundstrand Company Gas Fuel Metering Valve HFG2.0 User Manual

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Discrete Outputs 
The discrete outputs are +24 VDC. They are electrically isolated up to 500 
VAC. See Figure 1-16 for a typical discrete output alarm connection. 
 
CONTROLLER DISCR ETE INPUT
 
HFG2.0  DISCRETE  OUTPUT
 
 
 
CONTROLLER DISCRETE INPUT
 
HFG2.0 DISCRETE OUTPUT
 
 
Figure 1-16.  Typical Discrete Output Alarm Connections 
 
RS232 Serial Communications Interface 
Signal levels for the serial communications input and output are per 
RS232 standards. See Figure 1-17 for a typical RS232 serial interface 
connection. See Table 1-5 for computer COM port pin-outs for RS232. 
 
Figure 1-17.  Typical RS232 Serial Interface Connection 
 
INSTALLING THE HFG2.0 
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