| 摘要 |
PURPOSE:To reduce the number of signal wires in a signal wire line by installing an encoder on the transmission side and a decoder on the reception side. CONSTITUTION:When switch S11 is turned off on transmission side A, signals are sent to signal lines 1a, 2a and 3a through diodes 5D11, 6D11 and 7D11. Signal lines 1a-1d, 2a-2d and 3a-3d are brought togethr to line bundle 9 in terminal board 8, pulled out brushes C21-C211 through current collecting rings C11-C112 of current collector C and connected to main electromagnetic relays Y1-Y4, X1-X4 and Z1- Z4. Signals mentioned above exite main electromagnetic relays Y1, X1 and Z1 and turns relay contacts Y11, X11 and Z11 off, excitating thereby distribution relays RY11. In comparison with the customary method in which a switch on the transmission side is directly connected with distribution relay by means of signal lines, this device makes it possible to reduce the number of signal wires. |
