INTRODUCTION
SNAP PAC R-Series Controller User’s Guide
2
functions are not included. The -FM model is Factory Mutual approved.
The -W model
adds wireless LAN capability (see
page 2
for more information).
Built-in functions and comparisons of the SNAP-PAC-R1 and SNAP-PAC-R2 are shown in the
table on
page 44
.
Ethernet Communication
All SNAP PAC R-series controllers communicate over standard 10/100 Mbps Ethernet
networks and can be attached to an existing network. The controllers can also be used in an
independent control network built with standard, off-the-shelf Ethernet hardware.
SNAP PAC R-series controllers include two 10/100 Mbps Ethernet interfaces for networking
to Ethernet hosts and to other I/O units. These independent Ethernet ports have separate IP
addresses that can be used with PAC Project
™
Professional software to set up redundant
network links to safeguard the availability and reliability of an I/O system, or to segment a
control system’s network from the enterprise LAN.
Supported protocols over Ethernet include EtherNet
™
/IP, Modbus
®
/TCP, SMTP, SNMP, FTP,
and OptoMMP.
Wired+Wireless Communication
SNAP-PAC-R1-W
and
SNAP-PAC-R2-W
controllers add wireless capability to
communications. In addition to the two wired network interfaces, these models have a
wireless network interface as well, so each PAC has a total of three separate IP
addresses—two wired and one wireless. Wired+Wireless PAC can be
used wirelessly or on a wired network, or both at once.
For flexibility in designing your wireless network, wireless
communication includes support for 802.11a, b, and g standards.
Wired+Wireless PACs can be used with a variety of wireless switches
and other infrastructure hardware. For the best security, the 802.11i
WPA2/AES standard is supported, while older WPA and WEP security
standards are included for backwards compatibility.
Because wireless functionality is in the PAC itself, no additional parts
are required within the control system for wireless use. All SNAP
PAC racks and SNAP I/O modules can be used either wired
or wirelessly. You can switch from one network to the other
without reconfiguring I/O or changing field wiring.
Just like a laptop computer with a wireless connection, all
functionality remains the same whether the
Wired+Wireless PAC is used wirelessly or as part of a wired
network. Supported protocols remain the same. And
control programs run the same on both networks without
reprogramming.
