SC932A 9针对9针转RS-232 接口

概览

SC932A 支持数据采集器和带有S-23R2 DCE串口的设备之间的双向通讯。使用AC932A的Campbell Scientific设备包括SRM-5A RAD 直拽modem和RavenXT系列数字蜂窝调制解调器。SC932A也可用于第三方光纤调制解调器，Hayes兼容调制解调器，卫星和宽频电台。SC932A兼容所有带有CS I/O 端口的数据采集器。

优势与特点

  • Communicates at baud rates up to 115.2 kbps
  • Provides true RS-232 signal levels
  • Compatible with most Campbell Scientific data loggers

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技术说明

The SC932A is a 9-pin to 9-pin interface. Modems with a 25-pin DCE serial port, such as the SRM-5A, connect to the SC932A via the 15751 adapter.

This interface provides true RS-232 signal levels. It does not support one-way output or printers; our SC105 interface is recommended for those applications.

产品规格

Communication Rate Up to 115,200 bps
Operating Temperature Range -25° to +50°C
Operating Relative Humidity Range Up to 95% (non-condensing)
Power Requirements Data logger’s 5 V supply (For additional current, up to 10 mA may be used by the connected DCE device.)
Dimensions 2.3 x 4.1 x 7.6 cm (0.9 x 1.6 x 3.0 in.)
Weight 45.4 g (1.6 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)
CR10 (retired)
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR295X (retired)
CR3000 (retired)
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR6
CR800 (retired)
CR850 (retired)
CR9000 (retired)

Additional Compatibility Information

Cable Connections

Two cables (SC12 CS I/O Data Cable and 10873 Serial Data Cable) are shipped with the SC932A. The SC12 cable connects the SC932A to the data logger, and the 10873 cable connects the SC932A to the RS-232 DCE device. An SC12R-6 cable (purchased separately) may be used instead of the SC12 cable if a longer cable is required.

常见问题解答

SC932A: 11

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  1. What is the best way to remove corrosion on the pins (inside and out) of the SC932A?

    Send the SC932A in to Campbell Scientific for repair. If corrosion is limited to the DB9 connectors, the connectors may just need to be replaced and the interface tested.

    To return the SC932A, request a return material authorization (RMA) number and complete a Statement of Product Cleanliness and Decontamination form. The steps are listed on our Repair and Calibration page.

  2. Will an SC932A provide what is needed to connect a data logger to an Ethernet cable?

    No, the SC932A is a CS I/O to RS-232 interface for DCE devices, such as a modem. For Ethernet connectivity, an NL115, NL120, or NL200 should be used; the specific model depends on the data logger it will be used with and whether data will be stored on a CompactFlash card.

  3. How can an SC932A be used to directly download data from a data logger to a laptop in the field?
    This can be done using a female-to-female null modem adapter or cable.
  4. Why do some modems work with an SC932 but not with an SC932A?

    The SC932 has jumpers inside to configure how the DTR and RTS lines operate in reference to the data logger’s modem enable line. There are no jumpers to configure in the SC932A; the DTR line is driven always, and the RTS line follows the data logger’s modem enable line. If the SC932A does not work with a modem, the issue may be corrected by disabling the hardware flow control and/or configuring the modem to ignore the status of the DTR line.

  5. What is the difference between an SC932A and an SC932?

    The SC932 is a retired product that has a 9-pin CS I/O connector and a 25-pin male serial DTE connector. It also has jumpers inside to configure how the DTR and RTS lines operate in reference to the data logger’s modem enable line.

    The SC932A has a 9-pin CS I/O connector and a 9-pin male serial DTE connector. There are no jumpers to configure in the SC932A. The DTR line is driven always, and the RTS line follows the data logger’s modem enable line.

  6. Can an SRM-5A be connected directly to a CR1000, or is another module needed?

    If connecting to the CS I/O port, one of the following is needed:

    • An SC932A interface with a 15751 9 to 25 pin adapter
    • An SC932C interface

    A connection can also be made to the RS-232 port. However, the switch on the SRM-5A must be in the DTE position on the station modem, and adapters and gender changers may be needed to complete the connection.

  7. Can an RS-232 device be directly connected to the CS I/O port of a data logger?

    An RS-232 device cannot be directly connected to the CS I/O port of the data logger. A peripheral, such as an SC932A or SC105, is required.

  8. Can a CR10X and an RF modem be wired directly without using an SC932A?

    If the RF modem has a CS I/O connector, then it should be compatible with the CR10X without the use of an SC932A. Ensure that the RF modem’s firmware is compatible with the CR10X firmware.

    Note: RF modems that are not sold by Campbell Scientific will only interface with a CR10X via an SC932A or an SC105. 

  9. What is the difference between the SC105 and the SC932A?

    The SC932A only is compatible with modem-enabled (ME) two-way communication between a data logger and a modem. In contrast, the SC105 is compatible with both ME and Synchronous Device for Communication (SDC) communications, as well as having the ability to internally buffer data.

  10. 在连接一个 modem 到数据采集器时，需要什么设备？

    一根 空 modem 线缆，一个 SC932A，一个 SC105，或 SC110 能够被用来连接 modem 到数据采集器。这些产品也能够被用来作为通讯接口连接串口传感器。关于更多信息请咨询 Campbell Scientific 的应用工程师。

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