GLOSSARY
E1110A.DOC
Data and design subject to change without notice. Supply subject to availability
© Copyright by CERBERUS AG, CH-8708 Männedorf, Switzerland 1995
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12 Glossary
CPU
Central Processing Unit; the part of a computer containing the circuits required to interpret and execute the
instructions.
Fuse
An electrical device composed by short metallic wire protected by a glass bulb. The wire melts when the current that
flows in it is higher than the fuse limiting value.
LED
Light Emitting Diode; an electronic device that emits light when powered.
Multidrop connection
A type of network connection in which there two or more electronic devices (e.g. CMXs) on a single line.
Open collector
A kind of output that is implemented using a transistor; this output type usually is able to supply a limited amount of
current.
Optoisolator
A coupling device in which a light emitting diode (LED) energized by the input signals is optically coupled to a
photodetector such as a light sensitive output diode, transistor or silicon controlled rectifier.
Pushbutton
A temporary switch used on CMX to reset the CPU and all the I/O ports.
Relay output
A type of output that can drive high currents and voltages. Can be implemented on CMXs using the CMX-RB optional
device or connecting relays to the open collector outputs of a CMX-24O or CMX-16/8.
RS-232
The interface used in communication between the gateway and the IC-2.
RS-485
The interface used in communication between the IC-2 and the CMX connected to it.
Voltage suppression diodes
The diodes to be paralleled to the relay coil to suppress the circuit-opening voltage spike. The CMX is equipped with
internal diodes.
