I/O connection
VI1, VI2
Voltage Initiate (VI) inputs—dispense initiate inputs activated with a 5–24 VDC input voltage
EOC1, EOC2
End-of-Cycle (EOC) feedback outputs—the EOC circuit is normally closed in the enabled mode,
while the dispense cycle is inactive. The EOC switch opens when the dispense cycle is initiated
and closes when the dispense cycle is completed.
Upon completion of a dispense cycle, a solid state switch closes and remains closed until the
next dispense cycle. The EOC feedback circuit can be used to signal back to a host computer,
start another device in sequence, or initiate other operations that need to be tied to the
completion of the dispense cycle.
AI
Alarm Input (AI)—when an AI open circuit is sensed, the controller flashes the System Alarm
screen and prevents any further dispense cycles from initiating.
AO
Alarm Output (AO)—an AO signal can be triggered by an Auto Increment alarm, pressure alarm,
heater alarm, heater fault alarm, thermocouple disconnect (TC) alarm, or an Alarm Input signal.
When any of these alarm conditions occur (and are enabled), the controller sends an AO signal.
Heater fault and TC alarms cannot be disabled.
PS1–2
Power Supply (PS) output—the PS outputs can be used to supply 24 VDC power to a voltage
initiate, an external load, or to EOC and Alarm Out circuits for signalling purposes.
PS G (Ground)
24 VDC power supply output reference and return pins
GPI 1–4+
General Purpose Inputs (GPIs)—these inputs trigger a corresponding 24 VDC General Purpose
Output when a 5–24 VDC signal appears across the pins.
GPI 1–4-
Isolated return path for the corresponding GPI+ pins
GPO 1–4+
General Purpose Outputs (GPOs)—these outputs turn on when triggered by the corresponding
GPI.
GOI 1–4-
Isolated return path for the corresponding GPO+ pins
Connect General Purpose Inputs / Outputs
Use the supplied 16-position plugs to connect inputs and outputs as
applicable for your operation. Refer to Appendix A, “I/O Connector Pin
Technical Data” for detailed information.
The 32-pin I/O terminal strip includes the following inputs and outputs:
16-position plug
Installation (continued)
ValveMate 9000 Controller
25
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