| 摘要 |
PURPOSE:To prevent a setting error and an insertion error at the time of ex changing CPU substrates by considering the CPU substrates which can be used for either side of the relay substrate without the need of differently using the two kinds of CPU substrates by using the relay substrate for a right side or a left side as in the conventional manner in a dual system. CONSTITUTION:One relay 3 is loaded on the CPU substrate used for the dual system consisting of the relay substrate 2 and the two CPU substrates 1 and 1' holding the relay substrate 2 in between as one group, and a relay driving signal is allocated to the specified pin 3' of a connector. Even if the totally same CPU substrates are arranged on any side of the relay substrate, the connection pins of a transmission data output line Tx and a communication data input line Rx are switched, and a communication line between the two CPU substrates 1 and 1' can automatically be connected. |
