Yokogawa AAT145-S00 High Quality In Stock
Overview
The Input/output board (IKK-4) interfaces the control unit processor board to the system loop. The IKK-4 board also includes circuits for transient suppression of all external signals. The IKK-4 board is controlled by the control unit board, via the address and data busses.
The loop processor board SPK-2 controls and supervises two detector loops with analogue and addressable detectors. The detectors are constantly polled in order to detect faults or changes in alarm status. Detector-initiated alarms are also recognised and verified. The events are reported to the LPK-2 and proper hardware signals are then activated.
The battery voltage is fused. If the fuse is blown a signal is activated in the back plane. The fuse is accessible on the front panel of the board, and can be used for disconnecting the power.
Power supply for processor, memory and logic of the loop processor board.
Control logic for activation and blocking of hardware signals to the back plane. LEDs for indication of status and communication are also controlled in this block.
LEDs for indicating status of fire, fault, communication and voltage.
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