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首页KTTI-TSP通信与数字I/O附件卡用户指南(2021年2月)
KTTI-TSP通信与数字I/O附件卡用户指南(2021年2月)
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更新于2024-07-02
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标题:"077143801_KTTI-TSP_Feb_2021.pdf"文档介绍的是Keithley Instruments生产的KTTI-TSP通信和数字输入/输出附件卡。这款卡设计用于具有辅助卡插槽且配备TSP-Link接口的仪器,旨在增强仪器间的同步触发和通信能力。TSP-Link是一种高速同步触发与通信总线,它允许测试系统构建者将多个仪器配置成主从模式,以实现多通道测试的协同工作。通过这种连接,测试系统可以支持多达32台TSP-Link兼容设备。 TSP-Link的核心功能在于它允许这些仪器作为一个整体进行操作,即使它们物理上是分开的。这意味着在测试过程中,所有连接的仪器可以被一个主控仪器统一管理和控制,从而大大提高测试效率,减少了因为频繁与计算机交互而引起的延迟。这使得实验或测试流程更为流畅,特别是对于需要大量数据采集和处理的复杂任务,TSP-Link提供了显著的时间节省。 KTTI-TSP Communication and Digital I/O Accessory Instruction Sheet是用户手册,它详细介绍了如何安装、配置以及利用这款卡进行实际操作。这份文档可能包括设置步骤、接口技术规格、安全注意事项、故障排除指南以及各种示例应用案例,以便用户能够充分利用这款附件卡扩展他们的测试系统性能。 阅读这份文档对理解如何集成和优化TSP-Link技术,提升测试系统的灵活性和效率至关重要。无论是电子工程师、实验室技术人员还是系统集成人员,都需要熟悉并掌握这份指南中的信息,以便在实际项目中有效地使用这款 Keithley Instruments 的产品。
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KTTI-TSP Communication and Digital I/O Accessory Instruction Sheet
6 077143801 / Februrary 2021
Digital I/O port configuration
The following figure shows the basic configuration of the digital I/O port.
To set a line high (nominally +5 V), write a 1 to it; to set a line low (nominally 0 V), write a 0 to it. To allow an
external device to control the state of the line, the line must be set to input mode or open-drain mode. An
attached device must be able to sink at least 50 µA from each I/O line.
Figure 3: Digital I/O port configuration
Vext line
The digital I/O port provides a line (V
ext
) with a flyback diode clamp that you can use when controlling inductive
circuitry such as relay coils or low-power solenoids. You can use the built-in 5 V supply or an external voltage
supply for these types of applications. The externally supplied voltage can be up to +33 V.
Do not apply more than 50 mA (maximum current) or exceed +33 V (maximum voltage) on the
digital I/O lines. Applying current or voltage exceeding these limits may damage the
instrument.
![](https://csdnimg.cn/release/download_crawler_static/85925307/bg7.jpg)
KTTI-TSP Communication and Digital I/O Accessory Instruction Sheet
077143801 / Februrary 2021 7
Refer to the following figure for a simplified schematic of a sample control circuit for a relay. You can externally
power a different device by replacing the relay coil with the other device. The relay is actuated by configuring
the corresponding digital output line. Most of these types of applications use an active-low (set the bit to 0) to
turn the relay on (ON = 0 V). In the low state (0 V), the output transistor sinks current through the external
device. In the high state, the output transistor is off (transistor switch is open). This interrupts current flow
through the external device.
Figure 4: Digital I/O port (example external circuit)
+5 V line
The digital I/O port provides a +5 V output. You can use this line to drive external circuitry. The maximum
current output for this line is 500 mA. A self-resetting fuse with a one-hour recovery time protects this line.
If you are using this supply to drive a relay, it should be connected to the V
ext
line so that the relay is protected
by the flyback diode clamp.
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