Internal Components
VC3700 User’s Manual
Valco Cincinnati
68
EPC Board
PN 151xx379
Connectors
J1
Connection for 12VDC power supply, input analog signal, intake output signal, and
exhaust/sensor output signal
Indicators
CR1 (12 V supply)
When lit, this green LED indicates that the 12VDC supply voltage is available.
CR2 (Intake)
When lit, this yellow LED indicates that the Intake solenoid is active.
CR3 (Exhaust)
When lit, this yellow LED indicates that the Exhaust solenoid is active.
Jumpers
JP1 (E/S Out)
Output Signal Select
•
Pins 1 and 2 jumpered—Makes the E-OUT signal available at J1, pin 5, allowing
an external device to monitor the exhaust solenoid condition.
•
Pins 2 and 3 jumpered—Makes the S-OUT signal available at J1, pin 5, allowing
an external device to monitor the Sensor (transducer) analog signal.
Potentiometers
P1 (Span)
Provides adjustment of transducer signal gain, allowing an anticipated small transducer
excursion to effect a full scale (0 to 12V) change at TP2.
P2 (Zero)
Provides adjustment for nulling the pressure transducer signal at zero pressure.
P4 (Gain)
Provides adjustment of feedback loop gain and affects the hysteresis (and frequency)
for switching the intake and exhaust solenoids (not installed on later models).
Summary of Contents for VC3500
Page 1: ...VC3500 User s Manual Software Version 3 X Manual Number MCO35 Manual Release Date July 1999 ...
Page 19: ...Installation VC3500 User s Manual Valco Cincinnati 16 Figure 8 Internal Connections Diagram ...
Page 88: ...VC3700 User s Manual Software Version 3 X Manual Number MCO34 Manual Release Date July 1999 ...
Page 181: ...VC3500 VC3700 Troubleshooting Manual Manual Number MC048 Release Date May 1999 ...
Page 185: ...VC3500 VC3700 Troubleshooting Manual Valco Cincinnati Page 1 System Level Documents ...