这个产品是无效的且被替换: MD485.
| Services Available | |
|---|---|
| Repair | No |
| Calibration | No |
| Free Support | No |
概览
2004年一月一日，MD9多子站接口逐渐被新的多子站接口所取代，MD485 多子站接口。但是，用户现存的MD9网络依然可以使用MD0多子站接口。.
MD9 多子站接口使用一根单独的同轴线缆最多可连接200台数据采集器。网络中的每一台数据采集器都拥有一个单一的，用户指定的地址。电脑和特定数据采集器之间的通讯通过MD9的地址发送，允许其他网络保持静止状态。同轴电缆总长度可达3英里，网络中的每个MD9略微降低了最大传输距离。
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相似产品
技术说明
Effective 1 January 2004, the MD9 Multidrop Interface was generally replaced for new multidrop applications by the MD485 Multidrop Interface. The MD9 remains available for customers who have MD9 networks currently deployed in the field. MD9s and MD485s can NOT be used in the same network.
The MD9 Multidrop Interface links a central computer to up to 200 data loggers on a single coaxial cable. Total cable length can be up to 3 miles. At least two MD9s are required within a network.
产品规格
| Baud Rates | 9600, 1200, 300 (hardware-selectable) |
| Current Drain |
|
| Operating Voltage | 5 Vdc (from the PS150 or SC532(A) interface) |
| Carrier Frequency | 1.2 MHz |
| 操作温度范围 |
|
| Dimensions | 16.2 x 8.8 x 3.0 cm (6.4 x 3.5 x 1.2 in.) including connectors |
| Weight | 227 g (8 oz) |
兼容性
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
数据采集器
| Product | Compatible | Note |
|---|---|---|
| 21X (retired) | The 21X should have a serial number of 6195 or higher (others require factory modification and an RMA). | |
| CR10 (retired) | ||
| CR10X (retired) | The -PB versions of the CR10X requires LoggerNet 4.2 or higher. | |
| CR200X (retired) | ||
| CR206X (retired) | ||
| CR211X (retired) | ||
| CR216X (retired) | ||
| CR23X (retired) | The -PB versions of the CR23X requires LoggerNet 4.2 or higher. | |
| CR295X (retired) | ||
| CR3000 (retired) | Requires LoggerNet 4.2 or higher. | |
| CR500 (retired) | ||
| CR5000 (retired) | ||
| CR510 (retired) | The -PB versions of the CR510 requires LoggerNet 4.2 or higher. | |
| CR800 (retired) | Requires LoggerNet 4.2 or higher. | |
| CR850 (retired) | Requires LoggerNet 4.2 or higher. | |
| CR9000 (retired) |
常见问题解答
MD9: 1
-
Yes, but only if all the other data loggers are PakBus devices, such as the CR800, CR850, and CR1000.
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