问个问题...

有没有专用的485通讯线，大家通常都用哪种线？

<p>屏蔽双绞线</p>
<p>&nbsp;</p>
<p>RVSP 2*0.2以上吧</p>

<p>用线建议标准：</p>
<p>
<table style="WIDTH: 249pt; BORDER-COLLAPSE: collapse" cellspacing="0" cellpadding="0" width="331" border="0" x:str>
<colgroup><font size="2">
<col style="WIDTH: 25pt; mso-width-source: userset; mso-width-alt: 1056" width="33">
<col style="WIDTH: 112pt; mso-width-source: userset; mso-width-alt: 4768" span="2" width="149"></font>
<tbody>
<tr style="HEIGHT: 14.1pt; mso-height-source: userset" height="18">
<td class="xl92" style="WIDTH: 25pt; HEIGHT: 14.1pt" width="33" height="18" x:num="1"><font size="2">1</font></td>
<td class="xl91" width="149" medium? none; WIDTH: 112pt?><font size="2">读卡器连接线</font></td>
<td class="xl90" width="149" medium? none; WIDTH: 112pt?><font size="2">RVVP6*0.5</font></td></tr>
<tr style="HEIGHT: 14.1pt; mso-height-source: userset" height="18">
<td class="xl92" style="WIDTH: 25pt; HEIGHT: 14.1pt" width="33" height="18" x:num="2" medium? none?><font size="2">2 </font></td>
<td class="xl91" width="149" medium? none; WIDTH: none? 112pt; BORDER-TOP: medium="medium"><font size="2">电锁及门磁连接线</font></td>
<td class="xl90" width="149" medium? none; WIDTH: none? 112pt; BORDER-TOP: medium="medium"><font size="2">RVVP4*0.5</font></td></tr>
<tr style="HEIGHT: 14.1pt; mso-height-source: userset" height="18">
<td class="xl92" style="WIDTH: 25pt; HEIGHT: 14.1pt" width="33" height="18" x:num="3" medium? none?><font size="2">3 </font></td>
<td class="xl91" width="149" medium? none; WIDTH: none? 112pt; BORDER-TOP: medium="medium"><font size="2">出门按钮连接线</font></td>
<td class="xl90" width="149" medium? none; WIDTH: none? 112pt; BORDER-TOP: medium="medium"><font size="2">RVVP2*0.5</font></td></tr>
<tr style="HEIGHT: 14.1pt; mso-height-source: userset" height="18">
<td class="xl92" style="WIDTH: 25pt; HEIGHT: 14.1pt" width="33" height="18" x:num="4" medium? none?><font size="2">4 </font></td>
<td class="xl91" width="149" medium? none; WIDTH: none? 112pt; BORDER-TOP: medium="medium"><font size="2">RS485通讯总线</font></td>
<td class="xl90" width="149" medium? none; WIDTH: none? 112pt; BORDER-TOP: medium="medium"><font size="2">RVVP4*0.5</font></td></tr></tbody></table></p>
<p>&nbsp;</p>
<p><font size="2">当距离较远时，建议用RVVSP双绞屏蔽线代替RVVP使用，线径可适当增粗一点。</font></p>

[此贴子已经被作者于2010-9-23 14:49:12编辑过]

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