TS4000
4
Term /
Abbreviation
Definition
Hex
Hexadecimal Number
I / O
Input / Output
IM
Interface Module
Instrument Earth
Grounded using a grounding strap
Intrinsically Safe
Intrinsic safety is a protection concept employed in potentially explosive
atmospheres
IS
Intrinsically Safe
Latching
Refers to relays remaining in the “on” state even after the “on” condition
has been removed
LED
Light Emitting Diode
mA
Milli-Amps refers to 1/1000 of an Amp
Master
Controls one or more devices or processes
MODBUS
Master-slave messaging structure
N/A
Not Applicable
NC
Normally Closed
NO
Normally Open
Non-Latching
Refers to relays being reset to the initial state after “on” condition has
been removed
NPT
National Pipe Thread
OV Return
Over voltage return
OVDC
Power Supply Common Ground
Oxidation
Combining with Oxygen
PCB
Printed Circuit Board
PLC
Programmable Logic Controller
ppm
Parts per million
Reduction
A chemical reaction in which one or more electrons are transferred from
one atom or molecule to another
RFI
Radio Frequency Interference
RMS
Root-Mean-Square
ROM
Read Only Memory
RTV
Room Temperature Vulcanization
Safety Earth
Grounded to the earth
Slave
One or more devices or processes controlled by a master controller
SMT
Surface Mount Technology
SPAN Value
The programmed range of measurable parts per million
TB
Terminal Block
V
Volts
VAC
Volts Alternating Current
VDC
Volts Direct Current
XP
Explosion Proof
Zero or Zeroing
A process that eliminates background gas fluctuations during Calibration
or Gas Check Modes