Granville-Phillips Micro-Ion 354 E Series, Instruction Manual, Page: 21 / 54

Analog Operation
Micro-Ion E Module Instruction Manual 354011, Rev. A
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4.5 Micro-Ion E Gauge
ON/OFF Status
The gauge ON/OFF status pin (pin 9) is an open collector transistor output
rated for 40 Vdc, 50 mA maximum. Apply a voltage and pull-up resistor to
monitor the ON/OFF status of the Micro-Ion E gauge.
• Output is low (“sink”) when the Micro-Ion E gauge is ON.
• Output is high (“source”) when the Micro-Ion E gauge is OFF.
Figure 4-2 Micro-Ion E Gauge ON/OFF Status Wiring
4.6 LED Status Indicator
The status LED indicates the operating status of the Micro-Ion E gauge.
• Figure 4-3 illustrates the status LED on the module.
• Table 4-2 lists conditions indicated by the status LED.
Figure 4-3 LED Status Indicator
Internal module circuit
Status LED