MD485 是一种智能的RS-485 接口,允许PC对一个或多个数据采集器进行编址和通讯,通讯距离可多达1219 米。该接口还支持数据采集器与数据采集器之间的通讯,来自远程数据采集器的回呼,PC到打印机的通讯,以及数码相机到数据采集器的通讯连接。
MD485 包含3个端口(RS-232, CS I/O, RS-485),用于连接PC、数据采集器或另一个MD485。3个端口中的任意两个可以同时使用。
MD485 能够被设置成提供透明通讯、MD9 模拟和PakBus®联网。尽管MD485 能够模拟MD9,MD485 却不能够被添加到已有的MD9 网络中。PakBus 联网要求数据采集器使用PakBus 通讯协议。PC400 或 LoggerNet 软件用于初始化和控制PakBus通讯连接。
MD485 到货时带有10873 线缆和SC12 线缆,用于将MD485连接到PC或数据采集器。点-点 或 点-多点 网络使用以下设备:
在计算机端通常使用交流电源,需要使用#15966 市电充电适配电源。在野外站点,MD485 可由数据采集器的CS I/O 端口供电。如果MD485连接到数据采集器的RS-232 端口,而不是CS I/O 端口,或者如果数据采集器是在1997年12月之前购买,则需要#14291 野外电源线缆。电话-MD485 和 射频电台-MD485 网络也需要带空modem端口的供电电源。使用一个A100 适配器搭配PS100 或 PS200 供电电源使用,可提供此功能。PS100 通过市电充电器或太阳能板充电。
Function | Permits a PC to address and communicate with one or more data loggers over a distance of up to 1,200 m. |
Transmission Distance or Area | 1,219 m (4,000 ft) Can increase distance by using more MD485s or combining with spread-spectrum radios, Ethernet, or phone. |
Baud Rates | 1200, 9600, 19.2k, 38.4k, 57.6k, 115.2k bps |
Voltage | 12 Vdc (from data logger or pn 15966 wall charger) |
Surge | Complies with IEC61000-4-5, test level 3 (±2 kV, 2 Ω coupling impedance) |
Operating Temperature |
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Service Requirements | CABLE2TP two-twisted pair cables must be installed between networked data loggers and base. |
Maximum Cable Length | 1,219 m (4,000 ft) |
Dimensions | 15.88 x 6.35 x 1.91 cm (6.25 x 2.5 x 0.75 in.) |
Weight | 127.6 g (4.5 oz) |
Current Drain |
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Standby Mode | 1.2 mA |
Communicating | 2 to 7 mA |
Power |
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Standby Mode | 14.4 mW |
Communicating | 24 to 84 mW |
ESD |
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Air Discharge | Complies with IEC61000-4-2, test level 4 (±15 kV) |
Contact Discharge | Complies with IEC61000-4-2, test level 4 (±8 kV) |
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Product | Compatible | Note |
---|---|---|
21X (retired) | ||
CR10 (retired) | ||
CR10X (retired) | ||
CR200X (retired) | ||
CR206X (retired) | ||
CR211X (retired) | ||
CR216X (retired) | ||
CR23X (retired) | ||
CR295X (retired) | ||
CR300 (retired) | Use a 18663 null modem cable. | |
CR3000 (retired) | ||
CR350 | Use a 18663 null modem cable. | |
CR500 (retired) | ||
CR5000 (retired) | ||
CR510 (retired) | ||
CR6 | The CR6 has integrated RS-485. | |
CR800 (retired) | ||
CR850 (retired) | ||
CR9000 (retired) |
A desiccated, non-condensing environment is required. The MD485 includes built-in keyhole flanges for mounting to the backplate of a Campbell Scientific enclosure.
The MD485 can be combined with our AVW200-series Vibrating Wire Interfaces, CC640 Digital Camera, Ethernet links, phone modems (including cellular), and spread spectrum radios. Field site equipment should be housed in an environmental enclosure. Information about configuring the other devices is provided in the user manuals.
AC power is typically used at the computer site; a pn 15966 wall charger is required. At the field site, the MD485 is powered by the data logger through its CS I/O port. If the MD485 is connected to the data logger’s RS-232 port instead of the CS I/O port, or if the data logger was purchased before 12/97, a pn 14291 Field Power Cable is required. Phone-to-MD485 and spread spectrum radio-to-MD485 networks also require a power supply with a null modem port. An A100 adapter used with a PS150 or PS200 power supply provides this capability. The PS150 or PS200 is recharged via a wall charger or a solar panel.
Current MD485 operating system. Requires the Device Configuration Utility.
A software utility used to download operating systems and set up Campbell Scientific hardware. Also will update PakBus Graph and the Network Planner if they have been installed previously by another Campbell Scientific software package.
Supported Operating Systems:
Windows 11 or 10 (Both 32 and 64 bit)
MD485: 13
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