II Gl Abbreviations
ACRONYM
Description
A
SI unit symbol of the “ampere”, a unit of current intensity
Ah
SI unit symbol of the “ampere hour”, a unit of electrical
charge (electric current multiplied by time)
ASCII
American Standard Code for Information Interchange
Comms
techno-babble for data transmission/communication
Mx
ISO metric screw thread sizes, specifying the nominal
outer diameter of the screw, where x is the diameter in
mm
mm
SI unit symbol of the unit of length “millimeter” in the
metric system
Nm
SI unit symbol of the unit of torque (or “moment”)
RS485
standard defining the electrical characteristics of drivers
and receivers for use in serial communications systems
using balanced signals over differential line; RS485 does
not define a protocol but an electrical interface
RS232
standard defining the electrical characteristics of drivers
and receivers for use in serial communications systems;
valid signals are either in the range of +3 to +15 volts or
+3 volts is not a valid RS-232 level; RS232 does not
define a protocol but an electrical interface
SI
International System of Units
USB
Universal serial Bus, industry standard defining cables,
connectors and communication protocols for serial data
transmission between computers and devices
VDC
Volts of Direct Current
W
SI unit symbol of the “watt”, a unit of power
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