GPIB-120B 总线 隔离 器/扩展器 可用于测试和测量系统

【产品详情】

特征：

双向扩展

软件透明

60 VDC 连续电气隔离

National Instruments GPIB-120B 总线隔离器/扩展器可用于测试和测量系统，以提供电气隔离并扩展 GPIB 总线上允许的设备数量。 GPIB-120B为一个或多个GPIB设备提供电气隔离接口。

它根据 5 秒的介电耐压测试，在 GPIB 端口之间以及每个 GPIB 端口与电源之间提供高达 2,500 VDC 的非连续隔离。

GPIB-120B还扩展了GPIB上允许的设备数量。IEEE 488.1 标准规定 GPIB 系统中最多有 15 个电气设备接口负载。GPIB-120B将GPIB系统设备的数量从15个增加到28个。它还提供双向扩展，其中控制器、讲话者和侦听器可以存在于扩展的任一侧

NI GPIB-120B（部件号：779651-01、779651-04、779651-06和779651-07）是一款GPIB总线扩展器/隔离器。 该型号完全兼容 IEEE 488.1 和 IEEE 488.2 标准。使用此模型，用户可以将GPIB总线上允许的设备限制扩展到多达28个。因此，该扩展器/隔离器可用于各种测试和测量系统。

GPIB 120B总线隔离器扩展器具有出色的隔离能力，因为它可以在GPIB端口、电源和每个单独的GPIB端口之间提供高达2,500 VDC的隔离（非连续）。通过这种模式，可以实现GPIB系统设备的双向扩展，其中讲话者、监听者和控制器可以存在于扩展的两侧。

NI GPIB-120B 可 作为 仪器 和 IEEE 488 总 线 控制器 的 隔离 载 带， 可 有效 消除 感 应 共 模 噪声 和 接地 环 路 噪声。每个GPIB-120B使用户能够向GPIB总线添加多达14个附加设备。在功能上，该设备透明地运行。因此，与未消耗系统配合使用的GPIB控制和通信程序也可以与扩展系统一起使用。

该扩展器/隔离器提供两种数据传输模式：缓冲模式和无缓冲模式。在其标准配置中，无缓冲传输模式设置为默认开关设置。但是，用户可以使用设备背面提供的开关选择所需的数据传输模式。NI GPIB-120B 配备 8 条 数据 线 （DIO1、 DIO2、 DIO3、 DIO4、 DIO5、 DIO6、 DIO7 和 DIO8） 和 3 条 硬件 握 手 线。

GPIB-120B 总线 隔离 器/扩展器 可用于测试和测量系统

【英文介绍】

Features:

Bidirectional expansion

Software transparency

60 VDC continuous electrical isolation

The National Instruments GPIB-120B bus isolator/extender can be used in test and measurement systems to provide electrical isolation and expand the number of devices allowed on the GPIB bus. The GPIB-120B provides an electrical isolation interface for one or more GPIB devices.

It provides up to 2,500 VDC discontinuous isolation between GPIB ports and between each GPIB port and the power supply based on a 5-second dielectric withstand voltage test.

The GPIB-120B also expands the number of devices allowed on the GPIB. The IEEE 488.1 standard specifies a maximum of 15 electrical device interface loads in a GPIB system. The GPIB-120B increases the number of GPIB system devices from 15 to 28. It also provides bidirectional extensions, where controllers, speakers, and listeners can exist on either side of the extension

The NI GPIB-120B (part number: 779651-01, 779651-04, 779651-06, and 779651-07) is a GPIB bus extender/isolator. This model is fully compatible with IEEE 488.1 and IEEE 488.2 standards. Using this model, users can extend the limit of devices allowed on the GPIB bus to up to 28. Therefore, the extender/isolator can be used in various test and measurement systems.

The GPIB 120B bus isolator extender has excellent isolation capabilities because it provides up to 2,500 VDC isolation (non-continuous) between the GPIB port, the power supply, and each individual GPIB port. With this model, it is possible to achieve bidirectional expansion of GPIB system devices, where speakers, listeners, and controllers can exist on both sides of the extension.

NI GPIB-120B can be used as an isolated carrier band for instruments and IEEE 488 master line controllers, which can effectively eliminate sensing common mode noise and ground ring noise. Each GPIB-120B enables users to add up to 14 additional devices to the GPIB bus. Functionally, the device operates transparently. Therefore, GPIB control and communication programs that work with unconsumed systems can also be used with extended systems.

The extender/isolator provides two data transfer modes: buffered mode and unbuffered mode. In its standard configuration, the unbuffered transfer mode is set to the default switching setting. However, the user can select the desired data transfer mode using the switch provided on the back of the device. The NI GPIB-120B comes with 8 data cables (DIO1, DIO2, DIO3, DIO4, DIO5, DIO6, DIO7, and DIO8) and 3 hardware grip cables.

GPIB-120B 总线 隔离 器/扩展器 可用于测试和测量系统

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