这个产品是无效的且被替换: SDM-SIO4A.
| Services Available | |
|---|---|
| Repair | No |
| Calibration | No |
| Free Support | No |
概览
SDM-SIO4 增加了数据采集器的能力及灵活性。它含有 4个串口，可以与智能串口传感器、显示板、打印机、卫星通讯模块以及其它串行设进行通讯。在编程之后，SDM-SIO4 与所连接的设备进行通讯，并行于数据采集器自己的程序指令序列，因而整个的数据采集系统更为快速，更高效。
优势与特点
- 提供4个可配置的RS-232端口
- 多任务操作系统允许在所有端口上同时发送和接收数据。
图像
技术说明
SDM-SIO4 提供了4路串行RS-232端口，可以让数据采集器与智能串口传感器、显示板、打印机、卫星通讯模块以及其它串行设进行通讯。在编程之后，SDM-SIO4 与所连接的设备进行通讯，并行于数据采集器自己的程序指令序列，因而整个的数据采集系统更为快速，更高效。多任务的操作系统允许在所有的端口上进行同时发生的发送/接收数据。
产品规格
| Communication Rate | Speed at which data is transferred is controlled by the data logger and can vary with the microprocessor activity as well as the length of the SDM cables. |
| Typical Transfer Rate | One byte per millisecond |
| Power Supply | Unregulated 12 V supply, 9 to 18 Vdc |
| Internal Battery | Retains configuration information only. (Lithium battery has an estimated life of 10 years.) |
| Number of Ports | 4 (independently configurable for different serial data formats) |
| Serial Ports Baud Rate | 25 to 115,200 bps |
| Port Output |
|
| Port Configuration | 9-pin D connectors |
| Data Flow Control | By data logger or SDM-SIO4, if required, using hardware or software protocols |
| Onboard Diagnostics | Built-in system watchdog resets the processor in the event of a crash caused by transients and a built-in LED gives an indication of SDM-SIO4 status on power-up. |
| Input Voltage Limits | ±25 V |
| Operating Temperature Range | -25° to +50°C |
| Dimensions |
|
| Weight | 499 g (1.1 lb) |
Current Drain |
|
| All Ports Active | 40 mA |
| Quiescent | 0.7 mA (quiescent state entered if there is no SDM or port activity for ~30 ms) |
Buffers (each port) |
|
| Type | Fill & stop (Once filled, additional data received is lost.) |
| Receive (Rx) | 981 bytes + 16-byte hardware buffer |
| Transmit (Tx) | 981 bytes + 16-byte hardware buffer |
| Processed Data Storage | 891 bytes (suitable for storing 224 4-byte Campbell Scientific floating point values) |
| Floating Point Buffer | Used only when the data logger outputs floating point data via the SDM. This buffer is 241 bytes—sufficient for 60 floating-point values. |
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) | ||
| CR10 (retired) | To use the SDM-SIO4 with a CR10 requires a six-conductor cable instead of a five-conductor cable. The extra conductor attaches to control port 6,7, or 8. A Library Special PROM with Instruction 113 is also required. | |
| CR10X (retired) | To use the SDM-SIO4 with a CR10X requires a six-conductor cable instead of a five conductor cable. The extra conductor attaches to control port 6,7, or 8. The operating system must be CR10X OS version 1.4 or later. | |
| CR200X (retired) | ||
| CR206X (retired) | ||
| CR211X (retired) | ||
| CR216X (retired) | ||
| CR23X (retired) | ||
| CR295X (retired) | ||
| CR3000 (retired) | Although the SDM-SIO4 is technically compatible with the CR3000, Campbell Scientific recommends using one or more of the SDM-SIO1 instead. SDMs are connected to the ports labeled SDM-C1, SDM-C2, and SDM-C3. |
|
| CR500 (retired) | ||
| CR5000 (retired) | SDMs are connected to the ports labeled SDM-C1, SDM-C2, and SDM-C3. | |
| CR510 (retired) | ||
| CR6 | ||
| CR800 (retired) | Although the SDM-SIO4 is technically compatible with the CR800, Campbell Scientific recommends using one or more of the SDM-SIO1 instead. | |
| CR850 (retired) | Although the SDM-SIO4 is technically compatible with the CR850, Campbell Scientific recommends using one or more of the SDM-SIO1 instead. | |
| CR9000 (retired) | SDMs connect to ports provided on the CR9080 PAM module. |
Distributed Data Acquisition
| Product | Compatible | Note |
|---|---|---|
| Granite 10 | ||
| Granite 6 | ||
| Granite 9 |
Additional Compatibility Information
Note: Future data loggers may not support the SDM-SIO4, and therefore it is only recommended for existing networks that already contain this interface.
Data Logger Considerations
Programming
The SDMSIO4 Instruction controls the SDM-SIO4 operation in CRBasic. Instruction 113 controls SDM-SIO4 operation in Edlog (a Library Special PROM may be required in older data loggers).
Power Requirements
Because of the minimal current drain (0.7 mA quiescent, 40 mA with all four ports active), the SDM-SIO4 is typically powered directly from the data logger. A supplementary power supply may be required for some applications, especially where more than one SDM is operated by a single data logger.
Enclosure Considerations
The SDM-SIO4 requires a desiccated, non-condensing environment; a Campbell Scientific enclosure is recommended. The SDM-SIO4's case has mounting flanges for attachment to the 1"-on-center hole grid of Campbell Scientific enclosures. Grommets and screws are provided to attach the flanges to the backplate of our enclosures.
常见问题解答
SDM-SIO4: 5
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The battery is a CR2032 button cell lithium battery that is user replaceable. However, after the case is opened, proper ESD (electrostatic discharge) protection is required.
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Use four SDM-SIO1s or a single SDM-SIO4.
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Load the string to a buffer in the SDM-SIO4, and issue the command to send the string. For details, see the SDM-SIO4 Instruction Manual.
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It depends. It is possible to connect serial sensors to a data logger without the use of an SDM-SIO4. However, if the sensors require hardware flow control or true RS-232 voltage levels, an SDM-SIO4 may be needed. The SDM-SIO1 also works with RS-485 signals and is a preferred alternative to the SDM-SIO4.
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不完全一样，但很相近。SDM-SIO4 提供 RS-232 电平；CR1000 的控制口仅提供 0 到 5 V 的电平。通常这两种方式都支持所有的传感器，以及都支持 RS-232 和 TTL 逻辑。CR1000 更容易进行设置和编程，用于串口输入。SDM-SIO1 是另一种选项。
CR1000 能够处理字符串作为一种特殊的数据类型。它具有下面这些已集成的串行通讯功能：
- 4套控制端口对 —— COM1 (C1 Tx / C2 Rx) 到 COM4 (C7 Tx / C8 Rx)
- RS-232 端口
- CSI/O 端口，用于适合的接口设备
CR1000上的串行 I/O 功能，相似于但更快于 CR10X 或 CR23X数据采集器上的 SDM-SIO4 的功能。SDM 设备可编地址，连接到数据采集器的 C1 到 C3端口上。因此，在 CR1000 上连接多个 SDM 设备的一个优点是只占用3个控制端口。