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Concept

Concept


Products: AO-8, AO-V-8, DI-16, DO-FA-12, DO-FC-8, AS-P, PS-24V, RTD-DI-16, UI-16, UI-8/AO-4, UI-8/AO-V-4, UI-8/DO-FC-4
Functionalities: Hardware
Product version: 3.2
4/20/2021

Terminal Bases

arrow1_rotationBackplane Board arrow1_rotationDevice Addressing arrow1_rotationDevice Installation arrow1_rotationI/O Bus

The terminal bases are used for SmartX devices that are based on the patented two-piece design. The terminal base provides the I/O bus to the electronics module installed on the terminal base as well as to the SmartX device installed to the right (next terminal base in the chain).

There are three different types of terminal bases for the SmartX devices:

  • PS-24V power supply: one terminal block

  • SmartX AS-P servers: no terminal block

  • I/O modules: two terminal blocks

 
action_zoom_plus_stroke Terminal base for I/O modules
Figure: Terminal base for I/O modules

The terminal bases for the SmartX AS-P servers and I/O modules have the same backplane boards, which are connecting the power bus, the address bus, and communication bus from the left bus connector to the right bus connector. A common name for these buses is the I/O bus.

 
action_zoom_plus_stroke Internal configuration of the terminal bases for the SmartX AS-P servers and I/O modules
Figure: Internal configuration of the terminal bases for the SmartX AS-P servers and I/O modules

The terminal base for the PS-24V power supplies has a different backplane board, which does not pass through the power bus input from the left connector. The PS-24V power supply supplies power to the SmartX server and I/O modules installed to the right. The ground connection is connected from the left bus connector to the right bus connector in all terminal bases, because it is used as a common signal ground for the address bus as well as the communication bus.

 
action_zoom_plus_stroke Internal configuration of the terminal base for the power supply
Figure: Internal configuration of the terminal base for the power supply

Backplane Board

A backplane board is mounted in the terminal base for the W1 width devices. The backplane board is equipped with two 2x5-pin bus connectors, a 2x6-pin electronics module connector, address logic circuitry, and a device label.

For more information, see Backplane Board .

Device Addressing

Each device can detect its order in the chain of connected devices and assigns itself an address accordingly. This auto-addressing feature is provided by the terminal base backplane.

For more information, see Device Addressing .

Device Installation

The devices are designed mainly for installing on DIN rails in a cabinet.

For more information, see Device Installation .

I/O Bus

The I/O bus is a common bus that delivers power, address information, and communication to all devices connected to the bus. The I/O bus is provided to the devices through the backplane in the terminal bases. The term I/O bus also denotes the chain of devices that are connected together.

For more information, see I/O Bus .

See Also

  • Hardware Overview
  • PS-24V Power Supplies
  • SmartX AS-P Servers
  • I/O Modules
  • Backplane Board
  • Device Addressing
  • Device Installation
  • I/O Bus