| 摘要 |
<p>PURPOSE:To save a time and labor for a disconnected cable detection test. CONSTITUTION:A first connector 2-1 and a second connector 2-2 connect in the normal service signal lines (10-1)-(10-3) in a cable to signal lines (20-1)-(20-6) of external utility systems 5, 6 prepared in advance. The signal lines in the cable at the test are connected in series between a power supply and GND through a loopback display means 4 by using signal lines 15-1, 15-2 via switching means (3-1)-(3-6)to attain the conduction test.</p> |
