3500/25是由本特利内华达开发的增强型键相模块

3500/25是由本特利内华达开发的增强型键相模块。它是一个半高双通道模块，用于将Keyphasor信号传送到3500机架中的监视器模块。当轴上的键相标记与键相传感器对齐时，模块使用磁性拾音器或电涡流探头检测对准，并将输入信号转换为数字键相信号。

3500/25 功能说明

• 对于常规设置，3500 机械保护系统最多可以接受四个键相信号，对于配对配置，它最多可以接受八个。
• 旋转轴或齿轮的每圈一次或每圈多事件脉冲（称为键相信号）可用于精确检测时序。
• 因此，1 个监控模块和外部诊断工具可以测量轴旋转速度和矢量特性，如 3500X 振动幅度和相位。

增强型键相模块

• 增强型 3500 系统模块称为增强型按键模块。在外形、配合和功能方面与现有Keyphasor模块保持完全向下兼容性以用于传统系统的同时，它提供了比先前设计更高的Keyphasor信号处理能力。修订后的 149369-01 模块完全取代了 Keyphasor 模块 PWA 125792-01。
• 每当三重模块化冗余 （TMR） 应用需要系统键相输入时，3500 系统应使用两个 Keyphasor 模块。在此设置中，模块并行运行，为机架中的其他模块提供主键相和辅助键相信号。
• 如果主键相输入信号不超过四个，则具有四个以上键相输入的系统可以使用成对排列。

3500/25 操作

• 配对配置需要在上半槽位置或两个半槽位置连续两个监视位置。四个Keyphasor模块将提供四个输出通道，并接受四个主输入通道和四个备用输入通道（每个模块一个）。
• 设置三个Keyphasor模块也是可行的，两个耦合模块和一个非配对模块。用户可以这样配置单个未配对的键相（订购两个 2 通道或一个 1 通道和一个 2 通道选项）

隔离键相量 I/O 模块

• 隔离式按键I/O模块适用于以下情况：许多设备同时连接到Keyphasor 信号，并且需要与其他系统（如控制系统）隔离。
• 虽然隔离式 I/O 模块主要设计用于磁性拾音器应用，但只要提供外部电源，它就与 Proximitor* 应用兼容并提供隔离。
• 该 I/O 模块的主要目标是测量轴速度而不是相位。该模块可以提供相位测量，但与非隔离 I/O 版本相比，该 I/O 引入了更大的相移。从每圈多事件输入、现场可升级固件和资产管理数据报告创建每圈一次的事件信号是增强产品功能的示例。

输入信号规格

• 磁性拾音器或电涡流探头传感器最多可以向每个键相模块发送两个传感器信号。非隔离式I/O模块的输入信号范围为+0.8 V至21.0 V，隔离式I/O模块的输入信号范围为+5 V至-11 V。
• 超出此范围的信号在内部受到模块的限制。被动磁拾音器（200.3 Hz）需要超过 3 rpm 的轴转速。磁性拾音器或电涡流探头传感器最多可以向每个键相模块发送两个传感器信号。非隔离式I/O模块的输入信号范围为+0.8 V至21.0 V，隔离式I/O模块的输入信号范围为+5 V至-11 V。
• 超出此范围的信号在内部受到模块的限制。被动磁拾音器（200.3 Hz）需要超过 3 rpm 的轴转速。

输出

缓冲键相信号

机架前部有两个同轴连接器，带有缓冲键相输出。此外，机架背面可访问两个带欧式连接的缓冲键相输出。

输出阻抗

缓冲器的最大输出阻抗为 504 欧姆

键相传感器电源

键相传感器电源，-24 Vdc，每通道最大 40 mA

The 3500/25 is an enhanced keying module developed by Bently Nevada. It is a half height dual channel module used to transmit Keyphasor signals to the monitor module in the 3500 rack. When the keyphasor markings on the shaft align with the keyphasor sensor, the module uses a magnetic pickup or eddy current probe to detect alignment and convert the input signal into a digital keyphasor signal.

3500/25 Function Description

For regular settings, the 3500 mechanical protection system can accept up to four key signals, and for paired configurations, it can accept up to eight.

One or multiple event pulses per revolution of a rotating shaft or gear (referred to as keying signals) can be used to accurately detect timing.

Therefore, one monitoring module and external diagnostic tool can measure shaft rotation speed and vector characteristics, such as 3500X vibration amplitude and phase.

Enhanced Keyphasor Module

The enhanced 3500 system module is called an enhanced button module. While maintaining full downward compatibility with existing Keyphasor modules in terms of appearance, fit, and functionality for use in traditional systems, it provides higher Keyphasor signal processing capabilities than previous designs. The revised 149369-01 module completely replaces the Keyphasor module PWA 125792-01.

Whenever a Triple Modular Redundancy (TMR) application requires system keyphasor input, the 3500 system should use two Keyphasor modules. In this setting, the modules run in parallel, providing primary and secondary key signals for other modules in the rack.

If there are no more than four input signals for the main keyphasor, systems with more than four keyphasor inputs can be arranged in pairs.

3500/25 Operation

The pairing configuration requires two consecutive monitoring positions at the upper half slot position or two half slot positions. The four Keyphasor modules will provide four output channels and accept four main input channels and four backup input channels (one for each module).

It is also feasible to set up three Keyphasor modules, two coupled modules and one unpaired module. Users can configure individual unpaired keyphases in this way (order two 2-channel or one 1-channel and one 2-channel option)

Isolated Keyphasor I/O Module

The isolated button I/O module is suitable for situations where many devices are simultaneously connected to the Keyphasor signal and need to be isolated from other systems (such as control systems).

Although isolated I/O modules are primarily designed for magnetic pickup applications, as long as external power is provided, they are compatible with Proximitor * applications and provide isolation.

The main objective of this I/O module is to measure shaft speed rather than phase. This module can provide phase measurement, but compared to the non isolated I/O version, this I/O introduces a larger phase shift. Creating event signals once per lap from multiple event inputs, on-site upgradeable firmware, and asset management data reports is an example of enhancing product functionality.

Input signal specifications

Magnetic pickups or eddy current probe sensors can send up to two sensor signals to each keyphase module. The input signal range of non isolated I/O modules is+0.8 V to 21.0 V, and the input signal range of isolated I/O modules is+5 V to -11 V.

Signals outside this range are internally limited by the module. The passive magnetic pickup (200.3 Hz) requires a shaft speed exceeding 3 rpm. Magnetic pickups or eddy current probe sensors can send up to two sensor signals to each keyphase module. The input signal range of non isolated I/O modules is+0.8 V to 21.0 V, and the input signal range of isolated I/O modules is+5 V to -11 V.

Signals outside this range are internally limited by the module. The passive magnetic pickup (200.3 Hz) requires a shaft speed exceeding 3 rpm.

output

Buffer Key Belief Signal

There are two coaxial connectors at the front of the rack with buffered keyphasor outputs. In addition, the back of the rack can access two buffered keyphasor outputs with European connections.

Output impedance

The maximum output impedance of the buffer is 504 ohms

Keyphase sensor power supply

Keyphase sensor power supply, -24 Vdc, maximum 40 mA per channel