[求助]工程中出现的负电压问题？？...

<p><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang="EN-US">DC:</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">额定电压范围：<span lang="EN-US">-48 - -60V,</span>最大电压范围：<span lang="EN-US">-36 - -72V</span></span></p>
<p><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt; mso-bidi-font-family: 'Times New="New"  Roman'; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"><span lang="EN-US">类似这样的负电压是什么意思</span></span></p>

<p>我只在通讯设备上见过负电压，要小心哦，负的也能要命</p>

定

都说的是直流电源把&nbsp;&nbsp;
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