Specifications

REFERENCES
A.3References 8/01/201152-1002-8.1
PIRTB Point-type Infrared Termination Box
R Russian approved
Repl replacement
RFI radio frequency interference
RH relative humidity
rly(s) relay/relays
RM Relay Module
RTC real-time clock
RTU Remote Terminal Unit
RUS Russian approved
Rx Receiver
S
3
Safety System Software
SAM Signal Audible Module
SCADA Supervisory Control and Data Acquisition
sec seconds
sep separation
SIL safety integrity level
sgl single
SS Stainless Steel
STAR Selectable Transient Arc Rejection
surv surveillance
Tx Transmitter
TAR Transient Arc Rejection
TDSA Time Domain Signal Analysis
temp temperature
Ω ohm
UCR Upper Count Rate
UEL Upper Explosive Limit
UL Underwriter Laboratories
ULC Underwriter Laboratories of Canada Listed
USB Universal Serial Bus
UV Ultraviolet
UVIR Ultraviolet/Infrared
Vac Volts alternating current
Vdc Volts direct current
VDS Verband der Sachversicherer (German approval)
Vol Volume
w/ with
w/o without