概览
SC32B 光电隔离接口通常用于连接数据采集器的CS I/O 端口到 PC的RS-232端口上。这种接口可将电脑的 RS-232 端口的电压水平转换到数据采集器的CMOS水平，也可将数据采集器和电脑的电气系统隔离，从而防止接地回路，正常的静电放电和噪音。
优势与特点
- Connects a PC to the CS I/O port of a data logger
- Helps protect components from electrical damage
- No power source needed—powered by data logger and PC
- Ships with cables needed for most uses
- Baud rates up to 115 kbps supported
图像
技术说明
The SC32B, or another interface, is required for direct communications between a PC and a CR510, CR10X, or CR7 datalogger. For our CR800, CR850, CR1000, and CR1000X dataloggers, the SC32B is often used to provide optical isolation between the data logger and PC. Although the on-board RS-232 port of the CR3000, CR5000, or CR9000X dataloggers is isolated, the SC32B can be interfaced with their CS I/O port when a second RS-232 port is required in the application.
The SC32B is shipped with an SC12 (2 ft) cable for attachment to the data logger and a 10873 (6 ft) cable for attachment to the PC. Alternatively, an SC12R-6 (6 ft) cable (purchased separately) can be used instead of the standard SC12 when a longer cable is needed.
The SC32B can support RS-232 cable lengths of up to 50 feet; longer cable lengths are not recommended. The longer cable should be on the data logger side of the interface (CMOS logic levels) as opposed to the RS-232 side, which is typically more sensitive to drops in signal voltage levels.
产品规格
| Baud Rates Supported | Up to 115 kbps |
| Power | Drawn from the serial ports of the PC and data logger |
| Typical Current Drain |
|
| Connections | 9-pin RS-232 socket (female) port configured as DCE; 9-pin pin (male) port |
| Operating Temperature Range | -25° to +50°C |
| Dimensions | 4.1 x 2.3 x 7.6 cm (1.6 x 0.9 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 |
|---|---|---|
| CR9000 (retired) | The CR9000 requires a CR9080 PAM module. |
Additional Compatibility Information
Data Logger Considerations
The SC325B is compatible with data loggers that have a CS I/O port.
常见问题解答
SC32B: 13
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Because the SC-USB includes a processor, it costs more to manufacture than the SC32B.
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Yes. It ships with both the SC12 and 10873 serial cables. Usually, the SC12 is connected to the data logger, and the 10873 is connected to the computer.
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No. The SC32B cannot be used at the same time as an SDC device. The SC32B is a modem-enabled device and is not capable of concurrent communication.
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Non-isolated interfaces (that is, connection to the RS-232 port with a standard serial cable connection) can cause ground offset errors in analog measurements using a system connected to a PC and powered by an ac source. The SC32B provides isolation that may be important when recording low-level, single-ended voltage measurements.
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There are several differences:
- The SC32A requires a 25-pin serial cable between the computer and interface. The SC32B, on the other hand, has DB9 connectors for both the data logger and computer side.
- The SC32B cannot be configured to pass serial printer or computer data.
For comparisons, see the SC32A product page and the SC32B product page.
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The SC929 has been functionally replaced by the SC32B. While the SC929 is still available, the SC32B has increased capability at a reduced cost. See the table for a comparison:
SC929
SC32B
Optically Isolated
No
Yes
Maximum Baud
9600
115200
Current Draw
8 mA
Active < 200 µA
Cables are an additional comparison point for these two products:
- The SC929 cable directly connects the PC to the data logger’s CS I/O port.
- The SC32B interface typically uses the 10873 serial cable to connect to the PC and the SC12 cable to connect to the CS I/O port. Both of these cables are shipped with the SC32B.
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No, because it would not work. The SC32B is used to do the following:
- Convert data logger logic levels (on the CS I/O port) to RS-232 levels
- Optically isolate the data logger from the RS-232 peripheral
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This is not necessarily an error associated with the SC32B. The message means that an attempt to check or set the clock on a mixed-array data logger (CR10, CR21X, CR7X, CR10X, CR510, and CR23X) failed. There could be several reasons for this error.
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The combination of the USB to serial (17394) and the SC32B is basically the same as the SC-USB. Both options enable communication between a computer and a data logger with a CS I/O port.