AERCO Control System (ACS) - Manual (Page 10)

MC2: 04/23/13 Page 10 of 144
GF-131
AERCO Control System (ACS)
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
Installation, Operation, and Maintenance Manual
OMM-0081_0D
Phrases, Abbreviations and Acronyms (Continued)
Phrase, Abbreviation
or Acronym
Meaning
FDX Full-Duplex
FLT Fault
GND Ground
HDR Header
HDX Half-Duplex
Hex Hexadecimal Number (0 - 9, A - F)
Hz Hertz (Cycles Per Second)
INTLK Interlock
I/O Input/Output
I/O Box
Input/Output (I/O) Box currently used on all Benchmark and KC Series
products
IP Internet Protocol
ISO Isolated
LSB Least Significant Byte
LSD Least Significant Digit
MA (mA) Milliampere
MAX (Max) Maximum
MIN (Min) Minimum
Modbus®
A serial, half-duplex data transmission protocol developed by AEG
Modicon
MSB Most Significant Byte
MSD Most Significant Digit
MS/TP Master-Slave/Token-Passing (usually over RS485 networks)
OFFS Offset
OUTD Outdoor
PTP Point-to-Point (usually over RS232 networks)
REF (Ref) Reference
Response Time The maximum amount of time allowed to receive a response to a request
RS232
(or EIA-232)
A standard for serial, full-duplex (FDX) transmission of data based on the
RS232 Standard
RS422
(or EIA-422)
A standard for serial, full-duplex (FDX) transmission of data based on the
RS422 Standard
RS485
(or EIA-485)
A standard for serial, half-duplex (HDX) transmission of data based on
the RS485 Standard
RTN Return
RTU Remote Terminal Unit
SEN Sensor
SETPT (Setpt) Setpoint Temperature
SHLD (Shld) Shield
SLTA Serial LonTalk Adapter
SYS System
TEMP (Temp) Temperature
Terminating Resistor
A resistor placed at each end of a daisy-chain or multi-drop network in
order to prevent reflections that may cause invalid data in the
communication
VAC Volts, Alternating Current
VDC Volts, Direct Current
VFD Vacuum Fluorescent Display