Siemens SIMATIC HMI KP400 Comfort Operating Instructions Manual page 236

Abbreviations
RAM
PELV
RJ45
RTS
RxD
SD Memory Card Abbreviation of Secure Digital Memory Card
SELV
SP
PLC
Sub-D
TAB
TCP/IP
TFT
TxD
UL
USB
UPS
WINS
236
Random Access Memory
Protective Extra Low Voltage
Registered Jack Type 45
Request to send
Receive Data
Safety Extra Low Voltage
Service Pack
Programmable Logic Controller
Subminiature D (plug)
Tabulator
Transmission Control Protocol/Internet Protocol
Thin Film Transistor
Transmit Data
Underwriter's Laboratory
Universal Serial Bus
Uninterruptible power supply
Windows Internet Naming Service
Operating Instructions, 07/2017, A5E36770603-AB
Comfort Panels