Provides high resolution and high accuracy
概览
SDM-AO4A组件增加了数据采集器的连续模拟输出端口，该模拟输出可用于比例控制或驱动带状记录纸。
优势与特点
- Increases the number of CAO ports available to the data logger
- Supports both ±5 V and 0 to 10 V modes, allowing the module to be used in more applications
- Includes a choice of synchronous and sequential operation
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技术说明
The SDM-AO4A is designed to output four continuous voltages at levels set by a Campbell Scientific data logger. The data logger enables individual modules through an addressing scheme; multiple SDMs (in any combination) can be connected to one data logger. After a module is enabled, it operates independently of the data logger until additional commands are received or results are transmitted.
The SDM-AO4A can be operated in ±5 V mode or 10 V mode. In each of these modes, the SDM-AO4A can operate synchronously or sequentially. In synchronous mode, all channels are set at the same time.
产品规格
| Function | Increases the number of continuous analog output (CAO) ports available to a data logger. CAOs are used for proportional control or driving strip charts. |
| Number of Channels | 4 |
| Operating Temperature | -40° to +60°C |
| Voltage Range | ±5 V or 0 to 10 V |
| Resolution | 167 µV |
| Operating Voltage | 12 Vdc nominal (9.6 to 16 Vdc) |
| Maximum Output Current |
|
| Overcurrent Shutdown Point | 130 mA ± 15 mA |
| Dimensions | 13.46 x 8.51 x 2.41 cm (5.3 x 3.35 x 0.95 in.) |
| Weight | 175 g (6.2 oz) |
Accuracy with 20 kΩ Load (maximum) |
|
| 25°C | ±(0.05% of |Vout(V)|+500µV) |
| -40° to +60°C | ±(0.1% of |Vout(V)|+500µV) |
Additional Full-Scale Error with 50 mA Load |
|
| ±5 V Mode | -1.3 mV (typical) |
| 0 to 10 V Mode | -1.5 mV (typical) |
Typical Current Drain (±5 V Mode) |
|
| No load, Vout=0, Vsupply=12V | 11 mA |
| No load, Vout=fullscale, Vsupply=12V | 13 mA |
| With load, Vsupply=12V | 13 mA + load |
| Power Down Mode, Vsupply=12V | 1.1 mA |
Typical Current Drain (0 to 10 V Mode) |
|
| No load, Vout=0, Vsupply=12V | 21 mA |
| No load, Vout=fullscale, Vsupply=12V | 28 mA |
| With load, Vsupply=12V | 28 mA + (2.4)(load) |
| Power Down Mode, Vsupply=12V | 1.1 mA |
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) | Edlog data loggers only support the ±5 V mode and synchronous operation. | |
| CR10 (retired) | Edlog data loggers only support the ±5 V mode and synchronous operation. | |
| CR1000X | ||
| CR10X (retired) | Edlog data loggers only support the ±5 V mode and synchronous operation. | |
| CR200 (retired) | ||
| CR200X (retired) | ||
| CR205 (retired) | ||
| CR206 (retired) | ||
| CR206X (retired) | ||
| CR210 (retired) | ||
| CR211 (retired) | ||
| CR211X (retired) | ||
| CR215 (retired) | ||
| CR216 (retired) | ||
| CR216X (retired) | ||
| CR23X (retired) | Edlog data loggers only support the ±5 V mode and synchronous operation. | |
| CR295 (retired) | ||
| CR295X (retired) | ||
| CR300 | ||
| CR3000 (retired) | For the CR3000, SDMs are connected to the ports labeled SDM-C1, SDM-C2, and SDM-C3. | |
| CR310 | ||
| CR350 | ||
| CR500 (retired) | ||
| CR5000 (retired) | For the CR5000, SDMs are connected to the ports labeled SDM-C1, SDM-C2, and SDM-C3. | |
| CR510 (retired) | ||
| CR6 | ||
| CR800 (retired) | ||
| CR850 (retired) | ||
| CR9000 (retired) |
Distributed Data Acquisition
| Product | Compatible | Note |
|---|---|---|
| Granite 10 | ||
| Granite 6 | ||
| Granite 9 |
Additional Compatibility Information
Data Logger Considerations
Up to 15 SDM devices can be connected to a single data logger.
Power Supply
It may be convenient to use the data logger’s batteries to power the SDM-AO4A, but consideration must be given to the SDM-AO4A’s continuous current drain (11 mA in ±5 V mode or 21 mA in 10 V mode). The data logger’s alkaline batteries can power one SDM-AO4A for less than a month, and therefore these batteries are not recommended for continuous long-term operation. The data logger’s sealed rechargeable batteries, float charged by an ac supply or solar panel, typically can be used for long-term operation.
The SDM-AO4A may also be powered from an external 12 Vdc source, independent from the data logger batteries. The low side of this external 12 Vdc source needs to be connected to data logger ground and not directly to earth ground.
Enclosure Considerations
The SDM-AO4 requires a desiccated, non-condensing environment; a Campbell Scientific enclosure is recommended. The SDM-AO4A has built-in keyhole flanges for mounting to the backplates of Campbell Scientific enclosures. Grommets and screws are provided to attach the flanges/bracket to the backplate of our enclosures.
常见问题解答
SDM-AO4A: 4
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数据采集器可以通过配备SDM-AO4A (4通道，非隔离，电压)或SDM-CVO4(4通道，隔离，电压或电流) 来提供连续模拟输出，而且数据采集器可以同时连接多个SDM组件。
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是的，CR3000和CR5000本身有2个连续模拟输出通道，同时也可以连接SDM-AO4A (电压)或SDM-CVO4 (电压或电流)。
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CR1000 不含有任何连续模拟输出。它含有3个电压激发通道，通常在测量期间短暂地打开。可使用 SDM-AO4A 用于比例控制或驱动带状记录纸。
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CR1000配备SDM-AO4A (4通道, 非隔离, 电压) 或SDM-CVO4 (4通道, 隔离, 电压或电流) 后可以提供连续模拟输出，并且可以同时连接多个SDM组件，单个输出通道支持某些第三方的设备。