Description
Overview
Essential details:IC660BBD101 115VAC 8-Circuit Discrete I/O Block
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IC660BBD101Â 115VAC 8-Circuit Discrete I/O Block
Block Operation ________________________________
The 115VAC Low-leakage I/O block has eight identical circuits rated to operate at a nominal 115 volts AC. It can be used as combination input/output, inputs-only or outputs-only block.
If the block is configured as a combination block, circuits can be any mix of inputs and/or outputs. The actual state of each output circuit will be returned to the CPU in the corresponding input reference location. The CPU can monitor the feedback state to verify (after an appropriate delay) that the output switching device has operated properly and that the load has the proper voltage and current applied.
If the block is configured as an inputs-only block, all circuits must be regular inputs or tristate inputs.
If the block is configured as an outputs-only block, all circuits must be outputs; no feedback analysis will be performed.
Each circuit has its own LED. If the circuit is used as an input, the LED indicates the presence of threshold voltage at the input terminal. If the circuit is used as an output, the LED indicates the state commanded by the CPU.
Diagnostics ____________________________________
Block diagnostics are listed below. Overload and No Load reporting are optional features that can be disabled during block configuration.
Open Wire: Voltage, but no current on tristate input.
Overtemperature: Block’s internal temperature is above 100° C. Short Circuit: Instantaneous current on an output exceeds 30A during first two line cycles or 20A thereafter. Output is turned off automatically.
Overload: A load exceeds 2.8A (2.0A RMS) continuously for 100ms. Output is turned off automatically.
No Load: Load does not continuously draw 50mA from the output circuit.
Failed Switch: May mean output’s internal feedback state does not match its commanded state. False Failed Switch diagnostics may be
reported if an external device like a manual switch is wired in parallel with an output. Several other Failed Switch faults may be reported on inputs and outputs, indicating a need to replace the Electronics Assembly