VMIVME-3128-000 16通道隔离信号调理VME板

【产品详情】

16个隔离差分低电平模拟输入通道

通道到通道和通道到vmebus隔离到700个VRMS, 1,000个VDC

可选电流环终止输入电阻

缓冲高水平模拟输出

输入范围从±5mv到±10v可选

GE Fanuc / VMIC VMIVME-3417A 16通道隔离信号调理VME板设计用于直接接受来自温度和压力传感器或任何其他低电平模拟信号源的低电平差分输入。所有16通道输入相互隔离，并与VMEbus隔离。虽然VMIVME-3417A板可以与任何高级模拟输入板一起使用，但它是专门为VMIC的64通道扫描a /D转换板(如VMIVME-3113A， -3122)设计的配套产品。

当与64通道A/D板配合使用时，VMIVME-3417A提供±5 mV至±10 V的满量程输入范围。两极低通输入字母可与截止频率4,40，或400hz。可选的电流回路终端输入电阻可用，并取代输入字母。

开路热电偶输入在x100和x1000的增益是通过迫使开路通道在负方向偏离比例来检测的。该功能提供约40 nA的输入偏置电流，并将在3秒内以x1000的增益迫使通道输出偏离刻度。通过在负电压范围内强制打开通道来检测增益为x1和x10的打开热电偶输入。

为了与64通道A/D转换板的总电缆兼容，16个输出可以跳线指定为通道0至15或通道16至31(如果安装在P3)，通道32至47或通道48至63(如果安装在P4)。该功能允许两个VMIVME-3417A板连接到A/D转换器板上的32通道输入连接器中的任何一个，使用单个96线多滴带状电缆。

通过将输出缓冲器连接到P2连接器提供的外部参考电压，支持内置测试(BIT)。BIT由一个TTL P2输入控制。VMIVME-4125设计用于控制BIT并提供校准参考。

VMIVME-4125可以产生零参考电压(cal. 0)和各种接近满量程或大多数ADC应用的正负参考电压(cal. span)。

VMIVME-3128-000 16通道隔离信号调理VME板

【英文介绍】

16 Isolated Differential Low-Level Analog Input Channels

Channel-to-Channel and Channel-to-VMEbus Isolation to 700 VRMS, 1,000 VDC

Optional Current Loop Termination Input Resistors

Buffered High-Level Analog Outputs

Input Ranges Selectable from ±5 mV to ±10 V

The GE Fanuc / VMIC VMIVME-3417A 16-Channel Isolated Signal Conditioning VME Board is designed to accept low-level differential inputs directly from temperature and pressure transducers, or from any other low-level analog signal source.  All 16-channel inputs are isolated from each other and from the VMEbus.  Although the VMIVME-3417A Board can be used with any high-level analog input board, it is designed specifically as a companion to VMIC's 64-channel Scanning A/D Converter Boards, such as VMIVME-3113A, -3122.

When used in conjunction with 64-channel A/D boards, the VMIVME-3417A provides full-scale input ranges from ±5 mV to ±10 V.  Two-pole low pass input ?lters are available with cutoff frequencies of 4, 40, or 400 Hz.  Optional current loop termination input resistors are available, and replace the input ?lter.

Open thermocouple inputs at a gain of x100 and x1,000 are detected by forcing the open channel offscale in the negative direction.  An input bias current of approximately 40 nA is provided for this function, and will force the channel output offscale within 3 seconds at a gain of x1,000.  Open thermocouple inputs at a gain of x1 and x10 are detected by forcing the open channel within the negative voltage range.

For total cable compatibility with the 64-Channel A/D Converter Boards, the 16 outputs can be jumper designated either as Channels 0 to 15 or as Channels 16 to 31, if installed at P3 and as Channels 32 to 47 or as Channels 48 to 63, if installed at P4.  This feature permits two VMIVME-3417A Boards to be connected to either of the 32-channel input connectors on the A/D Converter Board, with a single 96-wire multidrop ribbon cable.

Built-in-Test (BIT) is supported by connecting the output buffers to an externally supplied reference voltage from the P2 connector.  BIT is controlled by a TTL P2 input.  The VMIVME-4125 is designed to control BIT and provide a calibration reference.

The VMIVME-4125 can produce a reference voltage of zero (cal. zero) and a variety of positive and negative reference voltages that approach full scale or most ADC applications, (cal. span).

VMIVME-3128-000 16通道隔离信号调理VME板

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