SCXI-1305 AC/DC耦合BNC接线端子

【产品详情】

National Instruments SCXI-1305 AC/DC耦合BNC接线端子

SCXI 1305（部件号：777687-05）屏蔽接线端子可用于连接以下模块的输入连接器：SCXI-1120/D、SCXI-1121、SCXI-1125、SCXI-1126、SCXI-1140或SCXI-1141/1142/1143。 这款 BNC 接线端子具有 8 个 BNC 连接器和一个 SMB 连接器，可使信号连接尽可能简单。BNC 连接器用于将信号连接到 8 个模块输入。SMB 连接器允许访问模块的数字信号。SMB 连接器还允许访问 SCXI-1140 模块的 HOLDTRIG 以及 SCXI-1141/1142/1143 模块的 OUTCLK 和 EXTCLK。但是，这些信号在 SCXI-1120/D、SCXI-1121、SCXI-1125 和 SCXI-1126 上不活跃。

在使用National Instruments SCXI-1305接线端子之前，用户必须确定SCXI系统中存在哪种信号源。信号源可以是浮动的，也可以是以地为参考的。浮动源不与建筑物地面系统相连，并且具有一个孤立的地面参考点，用户无法保证与另一个地面处于等效的电位。但是，如果计算机连接到建筑物电源，则以地面为参考的电源将链接到建筑物地面，并且与DAQ设备具有相同的接地。此外，用户应记住仅在单个点将输入信号参考到地，但前提是源是浮动的。不需要参考地面参考源，因为它们已经链接到建筑物地面。

NI SCXI-1305 上 的 每 个 通道 都 可 通过 开关 设置 进行 交流 或 直流 耦合 配置 。要设置用于交流耦合的接线端子，应将两个开关都设置在交流位置。对于SCXI-1305上的直流耦合，需要将两个开关都设置为直流位置。NI 设备 重 14.5 盎司， 尺寸为 6.83 x 1.19 x 3.91 英寸。在物理维度上。它的推荐工作和存储温度范围分别为 0 至 50 °C 和 –20 至 70 °C。

SCXI-1305 AC/DC耦合BNC接线端子

【英文介绍】

National Instruments SCXI-1305 AC/DC coupled BNC terminal

The SCXI 1305 (Part number: 777887-05) shielded terminal blocks can be used to connect the input connectors of the following modules: SCXI-1120/D, SCXI-1121, SCXI-1125, SCXI-1126, SCXI-1140 or SCXI-1141/1142/1143. This BNC terminal has 8 BNC connectors and one SMB connector to make signal connection as simple as possible. BNC connectors are used to connect signals to 8 module inputs. The SMB connector allows access to the module's digital signals. The SMB connector also allows access to the SCXI-1140 module's HOLDTRIG and the SCXI-1141/1142/1143 module's OUTCLK and EXTCLK. However, these signals are not active on SCXI-1120/D, SCXI-1121, SCXI-1125, and SCXI-1126.

Before using the National Instruments SCXI-1305 terminal, the user must determine which signal source is present in the SCXI system. The signal source can be floating or ground-based. The floating source is not connected to the building ground system and has an isolated ground reference point, and the user is not guaranteed to be at an equivalent potential with another ground. However, if the computer is connected to a building power supply, the ground-referenced power supply will be linked to the building ground and have the same grounding as the DAQ device. In addition, the user should remember to refer the input signal to the ground only at a single point, but only if the source is floating. There is no need to refer to ground reference sources because they are already linked to the building ground.

Each channel on the NI SCXI-1305 can be configured with AC or DC coupling via switching Settings. To set the terminals for AC coupling, both switches should be set in the AC position. For DC coupling on the SCXI-1305, both switches need to be set to the DC position. The NI device weighs 14.5 ounces and measures 6.83 x 1.19 x 3.91 inches. In the physical dimension. Its recommended operating and storage temperature ranges are 0 to 50 °C and -20 to 70 °C, respectively.

SCXI-1305 AC/DC耦合BNC接线端子

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