JPH0223798U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a repeater to which the first present invention is applied, FIG. 2 is a more detailed configuration diagram thereof, and FIG. 3 is a schematic configuration diagram of a repeater to which the second present invention is applied.
FIG. 4 shows a schematic configuration diagram of a disaster prevention system using repeaters. Explanation of symbols, A... Disaster prevention repeater of the present invention, 1...
...Main signal processing unit, 1a...CPU, 2...Dedicated connector, 3...Control unit, 3a...Slave signal processing unit, 3b...Interface circuit unit, 4...
First signal level fixing means, 5... Second signal level fixing means, 6... Terminal equipment, 8... Signal level fixing means, DBL... Data bus line, CB
L...control bus line, ABL...address bus line.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Multiple control units connected with terminal equipment according to disaster prevention purposes are connected to a main signal processing section including a CPU through a dedicated connector to a data bus line, control bus line, They are detachably connected through address bus lines, and each of the control units includes a slave signal processing section that sends and receives signals necessary for control to and from the CPU, and a control signal from the slave signal processing section. In a disaster prevention repeater that is configured to include a plurality of interface circuit sections that operate a corresponding terminal device or import the operating state of the terminal device into a slave signal processing section, among the plurality of interface circuit sections mentioned above, , some of the input/output terminals of a specific interface circuit section are provided with first signal level fixing means for fixing the signals of the input/output terminals to a specific level, and each connector corresponding to the control unit is on the data bus line of the main signal processing section of
When the control unit is not connected to the connector on the bus line through which the signal of the input/output terminal fixed by the first signal level fixing means of the interface circuit section is transmitted, the first The input/output level is fixed by the signal level fixing means.
A disaster prevention repeater configured to include second signal level fixing means so as to generate a signal that is an inversion of the signal at the output terminal. (2) Multiple control units connected with terminal equipment according to the purpose of disaster prevention are removably connected to the main signal processing section including the CPU via a data bus line, control bus line, and address bus line via a dedicated connector. Each of the control units has a slave signal processing section that exchanges information necessary for control with the CPU, and operates a corresponding terminal device using a control signal from the slave signal processing section. Alternatively, in a disaster prevention repeater configured to include a plurality of interface circuit sections that allow the operating state of the terminal device to be input to the slave signal processing section, the interface circuit section is located on the main signal processing section side of the connector. On the data bus line on which the signals of the input/output terminals of the controller are transmitted, when the control unit is not connected to the connector, there is a signal at a level that does not occur when the control unit is connected to the connector. A disaster prevention repeater configured to include connection and signal level fixing means.