Specifications

30 UMMBRG300-1101
NEMA
National Electrical Manufacturers
Association. NEMA defines standards for
various grades of electrical enclosures.
Node
A communications device on the network.
PC/ABS
Polycarbonate-ABS. Widely used
thermoplastic material.
PLC
Programmable Logic Controller
RS-232
See EIA-232.
RS-422
See EIA-422.
RS-485
See EIA-485.
Subnet mask
A numeric address used in conjunction with
an IP address to segment network traffic;
used to restrict transmissions to certain
subnets.
Switch
A device that facilitates transmissions
between nodes in a star-formed network.
TCP/IP
Transport Control Protocol/Internet
Protocol. Connection-orientated transfer
protocol.
Telnet
A network protocol (RFC 854) for character
based terminal access to remote machines.
UL 94
Plastics flammability standard released by
Underwriters Laboratories of the USA.