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Abbreviations And Definitions - Honeywell Excel 10 W7752D User Manual

Fan coil unit controllers lns plug-ins
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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE

Abbreviations and Definitions

CARE
Computer Aided Regulation Engineering;
the PC based tool used to configure
LonWorks devices.
CPU
Central Processing Unit; an EXCEL 5000
System controller module.
®
Echelon
The company that developed the
L
W
ON
ORKS
used to communicate on it.
EMI
Electromagnetic Interference; electrical
noise that can cause problems with
communications signals.
EMS
Energy Management System; refers to the
controllers and algorithms responsible for
calculating optimum operational parameters
for max. energy savings in the building.
EEPROM
Electrically Erasable Programmable Read
Only Memory; the variable storage area for
saving user setpoint values and factory
calibration information.
EPROM
Erasable Programmable Read Only
Memory; the firmware that contains the
control algorithms for the Excel 10 FCU
Controller.
Firmware
Software stored in a nonvolatile memory
medium such as an EPROM.
I/O
Input/Output; the physical sensors and
actuators connected to a controller.
I x R
I times R or current times resistance; refers
to Ohms Law: V = I x R.
K
Kelvin.
EN2B-0285GE51 R0909
®
network and the Neuron
L
W
ON
ORKS
NEC
®
NEMA
®
chips
NV
OEM
PC
Pot
segment
Subnet
TOD
VA
Vac
16
Echelon® L
W
® network for
ON
ORKS
communication among Excel 10 FCU
Controllers.
National Electrical Code; the body of
standards for safe field-wiring practices.
National Electrical Manufacturers
Association; the standards developed by an
organization of companies for safe field
wiring practices.
Network Variable; an Excel 10 FCU
Controller parameter that can be viewed or
modified over the L
W
ON
ORKS
Original Equipment Manufacturer; the
company that builds the fan coil units.
Personal Computer.
Potentiometer. A variable resistance
electronic component located on Excel 10
wall modules. Used to allow user-adjusted
Setpoints to be inputted into the Excel 10
FCU Controller.
A L
W
section containing no more
ON
ORKS
than 60 Excel 10s. Two segments can be
joined together using a router.
An L
W
segment that is separated by
ON
ORKS
a router from its Q7750A Zone Manager.
Time-Of-Day; the scheduling of Occupied
and Unoccupied times of operation.
Volt Amperes; a measure of electrical power
output or consumption as applicable to an
ac device.
Voltage alternating current; ac voltage as
opposed to dc voltage.
network.

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