User Manual
Original Instructions
857-VPA3CG Profibus DP Option Module
Catalog Number 857-VPA3CG
Summary of Changes
This publication contains new and updated information as indicated in the
following table.
The Allen-Bradley® 857 protection relays can be connected to the PROFIBUS
DP by using an external communications device 857-VPA3CG. The relay can
then be monitored from the host system.
PROFIBUS is a vendor-independent, open fieldbus standard for a wide range of
applications in manufacturing, process, and building automation. Vendor
independence and openness are guaranteed by the PROFIBUS standard EN
50170. With PROFIBUS, devices of different manufactures can communicate
without special interface adjustments. PROFIBUS can be used for both high-
speed time critical data transmission and extensive complex communication
tasks. The PROFIBUS family consists of three compatible versions that are
defined later in this manual.
Topic
Page
Summary of Changes
1
PROFIBUS-DP
2
PROFIBUS-PA
2
PROFIBUS-FMS
2
PROFIBUS-DP Device Profiles
2
Installation and Commissioning
6
Type Files
7
Dimensions
9
Specifications
10
Topic
Page
Added dimension graphic
9
Summary of Contents for 857-VPA3CG
Page 13: ......