PC3000 Complete Installation guide iss 12 - Elektro-Trading
PC3000 Complete Installation guide iss 12 - Elektro-Trading
PC3000 Complete Installation guide iss 12 - Elektro-Trading
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Cabling and Devices<br />
Multi-drop cable arrangements<br />
22-16<br />
In applications where several <strong>PC3000</strong>'s are multi-dropped from a single supervisory<br />
computer or from other <strong>PC3000</strong>'s the following arrangement may be used.<br />
Termination and ground current limit resistors should be fitted to the terminal block.<br />
Only terminate at the LAST <strong>PC3000</strong> in the chain.<br />
261 Interface unit<br />
A B<br />
1 3 5 7 9 11 13 15 17 19 21 23 25<br />
2 4 6 8 10 <strong>12</strong> 14 16 18 20 22 24<br />
Rx- Rx+ Tx- Tx+ Comm<br />
16 3 13 <strong>12</strong> 7<br />
<strong>PC3000</strong>/CABLE/25PIN/261/3·0M<br />
�������<br />
�<br />
Screen<br />
To 261 connections<br />
<strong>12</strong>0R 100R<br />
2 x between:<br />
3, 16 (receive)<br />
13, <strong>12</strong> (transmit)<br />
Leads should be<br />
sleeved as<br />
necessary<br />
7 9<br />
To 'clean'<br />
ground<br />
(see note)<br />
Between 7, 9<br />
(limits ground current)<br />
All resistors are 1/4w carbon composition<br />
Notes:<br />
All resistors are 1/4W carbon composition.<br />
Care should be taken when earthing the screens since all LCM ports share a common<br />
isolated ground.<br />
The screen is connected to this ground at each LCM and earth loops may result if<br />
other equipment connected to LCM ports earth the screen indirectly via the common<br />
ground.<br />
For Baud rates above 5600 the stub length from <strong>PC3000</strong> to the DIN rail should be<br />
reduced to 1metre.<br />
<strong>PC3000</strong> <strong>Installation</strong> Guide
Change language