Hardware Reference Guide
SST-PFB3-ISA
22 Installation
©2004 Woodhead Software & Electronics, Division of Woodhead Canada Limited
Document Edition: 1.0, Document #: 715-0078, Template Edition: 1.1, Template #: QMS-06-045
Use, duplication or disclosure of this document or any of the information contained herein is subject to the restrictions on page ii of this document.
2.4 Downloading a Firmware Module
For instructions on downloading a firmware module to the card, refer to Section C.1,
Loading a Firmware Module
.
2.5 Connecting to a Profibus Network
This section provides connection, termination, power and grounding details.
2.5.1 Connecting the DB9
The following table describes how to connect the Profibus DB9.
Table 6: DB9 Instructions
DB9 Pin Description
DB9 Pin #
DB9 Termination with Card
Chassis ground
1
Reserved 2
Data +
3
Connect this pin to Pin 8 (data -)
with 220 ohm resistor
Tx enable
4
Isolated ground
5
Connect this pin to Pin 8 (data -)
with 390 ohm resistor
Voltage plus
6
Connect this pin to Pin 3 (data +)
with 390 ohm resistor
Reserved 7
Data -
8
Reserved 9