SERVOPRO NOx Analyzers Page
CAUTION: Do not connect these pins directly to both sides of a voltage
power supply as unrestricted current will damage the relay.
Example of digital output driver.
DIGITAL INPUT
The analyzer’s Digital Inputs are internally pulled up to 5VDC and are operated by user
equipment connecting an input to the Digital Ground (Main, Pin 6). Note that some lines require
only momentary operation, and some selection lines are intended to be held continuously.
DRV
The calibration gas valve drivers are application-specific and intended for solenoid valve drive.
24VDC valves with a maximum wattage of 12 Watts should be used. The 24VDC used to
operate the valves should be connected to the coils, and the analyzer inputs when operating will
pull the valve current to Digital Ground.
24VDC
The 24DVC output is intended for use with properly rated solenoid valves.
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