公开(公告)号：JPS6438980A

公开(公告)日：1989-02-09

申请号：JP9537588

申请日：1988-04-18

Applicant: TANDEM COMPUTERS INC

Inventor： EI RICHIYAADO ZATSUCHIYAA ,  JIEI AARIN ZUWAGAAMAN ,  FURANSHISU JIEI DOWAN

IPC: G06F13/40 ,  G11C5/00 ,  H01R13/64 ,  H01R13/70 ,  H05K7/14

Abstract: PURPOSE: To prevent the increase in power of a pair of modules mutually connected, when they are not electrically compatible by providing a means for connecting a control terminal only when modules are electrically compatible, and a switch capable of controlling the power to the module pair only when the control terminals is connected. CONSTITUTION: A first module 10 comprises a controllable switch 40, having two control terminals 42, 44, and supplies a power to a pair of modules 10, 12 mutually connected only when the two terminals 42, 44 are connected conductivley. When the electrically compatible modules 10, 12 are mutually connected, the control terminals 42, 44 are conductively connected to supply the power to the modules 10, 12. If the mutually connected modules 10, 12 are not compatible, the control terminals 42, 44 are not conductivity connected to interrupt the power supply to the modules 10, 12. Thus, arc discharge or data extinguishement can be prevented during the mutual connection.