HL-DS-NT4-WEB* | HL-DS-NT1 | HL-DS-NT2 | HL-DS-NT3 | HL-DS-NT4 | HL-DS-NT4-WL |
| 外供电 | √ | √ | √ | √ | √ | √ | 开关量输入 | 2 | 2 | 2 |
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| RS232&RS485 | √ |
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| USB&RS485 | √ |
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| TCP/IP RJ45&RS485 | √ |
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| WLAN&RS485 | √ |
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| HL-U2 | DS-PT2 | DS-PT4 | DS-PT4-WL | HL-DS-R-1 | HL-U1 |
| 外供电 | √ | √ | √ | √ | √ | √ | 数字模拟探头输入 | 4 | 4 |
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| 模拟输入0..2.5V | √ | √ |
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| 开关量输入 | 2 | 2 | 2 | 2 | 2 | 2 | Pt100输入 | 4 | 2 | 2 |
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| RS232&RS485 | √ |
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| USB&RS485 | √ | √ | √ |
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| TCP/IP RJ45&RS485 | √ |
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| WLAN&RS485 | √ |
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| 继电器输出 | √ |
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| HL-U2-420 | HL-U4 | HL-U4-420 | HL-U4-420-WEB* | HL-U4-WEB* | HL-U4-WEB-WL* |
| 外供电 | √ | √ | √ | √ | √ | √ | 数字模拟探头输入 | 4 | 4 | 4 | 4 | 4 | 2 | 模拟输入0（4）..20mA | √ | √ | √ | √ | √ | √ | 开关量输入 | 2 | 2 | 2 | 2 | 2 | 2 | USB&RS485 | √ |
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| TCP/IP RJ45&RS485 | √ | √ | √ | √ |
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| WLAN&RS485 | √ |
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| 通过Internet Explore查询 | √ | √ | √ |
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| HL-DS-NT0 | HL-DS-NT1 | HL-DS-NT2 |
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| HL-DS-NT3 | HL-DS-NT4 | HL-DS-NT4-WL |
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