ACC-28E 模数转换器

Description

ACC-28E 模数转换器

配置:
•选项1:附加两个板载16位A/D转换器
•选项2B:安装子卡

部件编号:603404-105

特点:
2或4通道
模数转换器
精密电压测量
Delta Tau ACC-28E高分辨率a – d转换器是一款2或4通道(可选1)模拟到数字转换器接口板，旨在提供一种精密电压测量手段，作为UMAC Turbo或UMAC MACRO系统的输入。该配件使用四个(或两个)16位模拟到数字转换器，提供精确到±2位的电压测量。

跳线允许每个A-D转换器被选择为双极或单极转换模式。当选择双极模式时，差分输入允许用户将输入电压施加到±10伏(20V p-p)。当选择单极模式时，用户可以应用从0V到+10V的输入电压(负输入必须接地)。

为比率式输入控制提供了电压参考。VREF输出是为使用缩放输入进行精确跟踪的设备提供的。+5Vdc和-5Vdc电源抽头不太精确，并且提供允许用户在不需要外部电源的情况下偏置电位器。

提供输入零修剪器以允许输入信号的精确调整。光耦合器用于隔离ac – 28e的电路与PMAC。

Acc-28E将部署在Delta Tau的3U机架上。背板提供ac – 28e所需的所有电源(±15Vdc， +5Vdc)。然而，与卡上的一些跳线相关联的终端块也允许用户连接外部±15Vdc，如果他们选择这样做的话。

ACC-28E

ACC-28E 模数转换器

Configuration:
• Option 1: Additional two on-board 16-bit A/D converters
• Option 2B: Installed daughter card

Part Number: 603404-105

Features:
2 or 4 Channel
Analog to Digital Converter
Precision Voltage Measurement
The Delta Tau ACC-28E High Resolution A-D Converter is a 2 or 4 (Option 1) channel analog to digital converter interface board designed to provide a means for precision voltage measurement as an input to the UMAC Turbo or UMAC MACRO systems. This accessory uses four (or two) 16-bit analog to digital converters to provide voltage measurements accurate to ±2 bits.

Jumpers allow each A-D converter to be selected for bipolar or unipolar convert modes. When selected for bipolar mode, differential inputs allow the user to apply input voltages to ±10 volts (20V p-p). When selected for unipolar mode, the user can apply input voltages from 0V to +10V (the negative input must be grounded).

Voltage references are provided for ratiometric style input control. The VREF output is provided for equipment that uses a scaled input for accurate tracking. The +5Vdc and -5Vdc supply taps are less precise, and are provided to allow the user to bias potentiometers without the need for an external power supply.

Input nulling trimmers are provided to allow for precise adjustment of input signals. Opto-couplers are used to isolate the Acc-28E’s circuitry from the PMAC.

Acc-28E will be located in Delta Tau’s 3U rack. The backplane provides all the power needed (±15Vdc, +5Vdc) for the Acc-28E. However, a terminal block associated with some jumpers on the card also allows the user to connect external ±15Vdc if they chose to do so.