Transistor Outputs - Hach sc200 User Manual

Figure 4-4. Increasing Contact Life Span

Transistor Outputs

• Each output can be wired separately as either npn or pnp.
• The 0-volt signal of the transistor outputs is isolated from the
controller's 0-volt signal.
• The ModCon75 Controller application uses transistor output O11
for FAULT indication.
NOTE: The FAULT indication is normally energized and is
deactivated when a fault occurs.
• The ModCon75 Controller application uses O12 for an internal
timer which toggles at a rate of 0.5 seconds ON and 0.5 seconds
OFF (1 Hz.). This can be used for external monitoring of the
controller operational status.
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