| 摘要 |
<p>A programmable sequence controller has indicator lamps (Li, Lo) for displaying the input statuses and output statuses of signals at input and output terminals (Ti, To). The indicator lamps (Li, Lo) are connected with the signal input and output terminals (Ti, To) through a connector (320, 321), and cover the front surface of the signal input and output terminals (Ti, To).</p> |
