FX16 Master Controller Technical Bulletin 11
• Analog Outputs (AOs) are opto-isolated and externally powered at
24 VAC. To maintain the opto-isolation, you must use a separate
power supply (3 VA) only for the analog outputs.
• Digital Inputs (DIs) are opto-isolated and externally powered at
24 VAC. To maintain the opto-isolation, you must use a separate
power supply (3 VA) only for the digital inputs.
• Digital Outputs (DOs) are isolated relays or opto-isolated triacs
supporting 24 VAC.
• N2 and LON communication ports are electrically isolated from the
digital inputs and analog/digital outputs and power supply.
• The RS-232C communication port is not isolated from the processor
circuits (CPU) or 24 VAC power supply.
FX16X Controllers (Rev. A)
Consider the following information when you work with the
connections details for the FX16X controllers (Rev. A):
• Analog Inputs (AIs) are not isolated from the Central Processing
Unit (CPU) but are isolated from the 24 VAC power supply.
• Analog Outputs (AOs) are opto-isolated from the CPU and
internally powered at 24 VAC from the power supply. An external
24 VAC power supply for the AOs is not required.
• Digital Inputs (DIs) are opto-isolated from the CPU and internally
powered at 24 VAC from the power supply. An external 24 VAC
power supply for the DIs is not required.
• Digital Outputs (DOs) are isolated relays or opto-isolated triacs
supporting 24 VAC
• N2 and LON communication ports are electrically isolated from the
digital inputs and analog/digital outputs and power supply.
• The RS-232C communication port is not isolated from the CPU but
is isolated from 24 VAC power supply.
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