Specifications

Rockwell Automation Publication AG-SG001G-EN-P - April 2015 57
Choosing Data Communication Equipment Chapter 3
Managing Cost of a Cellular Network Data Charges
The design of a cellular network has to be done with care factoring in
connectivity and bandwidth requirements. This will enable a designer to meet
any cost targets involved. An important factor that affects the cost is the Network
overhead. There are primarily two modes of communication when using an IP
network - TCP and UDP.
TCP stands for Transmission Control Protocol. It is a transport protocol and
offers a guaranteed delivery service. The reason TCP is able to offer guaranteed
service is because it has a mechanism in the network layer itself to detect loss of
data packets and retransmit the lost packets.
UDP stands for User Datagram Protocol. This is also a transport protocol which
does not offer reliable service for data delivery. This protocol leaves the
responsibility of data receipt up to the application layer in the protocol stack.
Table 4 - Comparison of Cellular Modems from Rockwell Automation Encompass Partners
Partner Name Product Name / Catalog Number Description
Digi International Digi Connect WAN IA (Verizon) / DC-
WAN-G511
• Uses Verizon CDMA.
• Din rail mountable.
• Class 1, Div 2
Digi International Digi Connect WAN IA GSM/ DC-WAN-
F501
• Uses GSM EDGE.
• Din Rail mountable.
• Class 1, Div 2 approved.
CalAmp LandCell 882 • Applies GSM and CDMA technology.
• Updates are quick and easy with over-the-air configuration
and browser-based management.
• Interfaces with Ethernet, USB or serial devices.
• Supports HSPA and EVDO data rates over public networks.
CalAmp LandCell819 • GPRS cellular data modem gets you connected with a quad-
band integrated platform through a serial connection.
• With plug-and-play installation.
• Packet data transmission speeds up to 86 kbps.
CalAmp Vanguard 3G • Broadband router
• CDMA or GSM connectivity
• Uses EVDO technology
• Has an optional WIFI access point
Hiprom Technologies GSM /CELL Module
1756HP-CELL
• GSM cellular network for Logix messaging.
• SMS/GPRS/3G for alarm notification and remote
monitoring.
• Platform - 1756 ControlLogix I/O
Prosoft Technology Cellular Ethernet/Serial Modem
RLXIC Family
• Broadband M2M.
• SCADA connectivity over GSM HSUPA cellular networks.