VMIVME-3125-000 内置跟踪保持功能 输入过压保护

【产品描述】

• 16 个差分或 32 个单端模拟输入通道

  一个内置跟踪保持功能的12位A/D转换器

  输入过压保护

  40 kHz 聚合转换速率

  前面板 LED

  Abaco Systems / VMIC VMIVME-3125 32 通道 12 位 A/D 转换器模块可自动扫描 16 个差分或 32 个单端模拟输入通道。通道通过12位分辨率的模数转换器（ADC）进行数字化处理。每个输入都具有过压保护和低通滤波功能。该板非常易于使用，无需软件设置。上电或系统复位后，VMIVME-3125 会自动开始扫描其 16 或 32 个输入通道中的每一个。转换数据自动存储在双端口存储器中，可立即从 VMEbus 访问。VMIVME-3125 提供板载电压基准，以执行在线或离线内置自检。输入电压范围和增益可通过跳线进行用户设置。VMEbus 基址和访问模式是完全可选的。

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• Features:

  The latching contact maintains its condition in case of power failure

  Both locked and non-locked versions are available

  1 Type C contact (SPDT) with 96-core cable

  1 Type A contact (SPST) with 64-core cable

  8 bit, 16 bit or 32 bit data transfer

  Supports real-time and offline fault detection and isolation

  2.0 A rated current

  Prevent relays from changing during power-on/power-off

  Abaco Systems/VMIC VMIVME-2210 provides users with 64 One Form C (SPDT) contacts through two 96-pin DIN connectors. These relays are magnetic latching type, which means that once the contact is set, it will remain set (even if the power is disconnected from the relay) until it is reset. All three contact points are led out through connectors. They are the N.O. (normally open), N.C. (normally closed), and common contact points. N.O. and Common can be used to create A type A contact, while NC and Common can be used as a type B contact. Normally open contacts are located on row A of the connector, and common contacts are located on row C of the connector, as shown in Figure 1. This arrangement allows 64 core cables to be used for type A switches.

  The VMIVME-2210 is equipped with a bipolar relay, but only one pole is drawn out to the user. The other pole is used by built-in test (BIT) logic. The status of the control data register or NC pole is read during board read access. The control register is located at the same address as the relay. This allows users to monitor the status of user contacts and control registers. Since the reader and user poles are controlled by the same coil, the BIT can pass through the N.C of the second pole. Contacts Monitor the user's contacts.

  The N.C. contact provides logical contacts for the logical contacts that write to the data register. This provides positive data feedback from the touch BIT logic. When logic 1 writes to the control register, it activates the relay, which causes normally open contacts to close and normally closed contacts to break. When the contact BIT logic is read, the logical BIT is returned.

  The control data register is also monitored because the relay takes a long time (up to 7 ms) to change its contacts. The board's VMEbus access performed so fast that the relays appeared to malfunction, leading to false conclusions. To prevent this, the user can check the status of the data register instead of waiting for the contact of the relay to close.

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