products

Analog I/O Module
The Mark* VIeS Functional Safety Analog Input / Output (I/O) module provides an interface between the process analog sensors / actuators (10 analog inputs and two analog outputs) and the Mark VIeS Safety control logic. The Analog I/O module consists of two orderable parts: the Analog I/O pack and the Analog I/O terminal board. All safety Analog I/O modules use the same Analog I/O pack, IS420YAICS1B. There are two DIN-rail mounted Analog I/O terminal boards available to provide the necessary redundancy and
terminal block styles. Users can select the configuration that best addresses their needs for availability and SIL level. The Analog I/O module is available in both Simplex and Triple Modular Redundant (TMR) configurations. This document discusses the Simplex Analog
I/O (IS410STAIS2A) terminal board and the TMR Analog I/O (IS410TBAIS1C) terminal board.
In a TMR configuration, the controller selects the median analog input values returned by the TMR I/O pack(s) (thus rejecting a high or low out of range value) and the I/O pack electronics combine the analog outputs with a patented circuit design that rejects a bad performing I/O pack.
Simplex Analog I/O (STAI) Terminal Board
The STAI terminal board is a compact analog input terminal board that accepts 10 analog inputs and two analog outputs, and connects to the YAIC I/O pack. The 10 analog inputs accommodate two-wire, three-wire, four-wire, or externally powered transmitters. The analog outputs are configured for 0 to 20 mA. An on-board ID chip identifies the board to the I/O pack for system diagnostic purposes.
TMR Analog I/O (TBAI) Terminal Board
The TBAI terminal board is an analog input terminal board used in TMR and Simplex configurations that supports 10 analog inputs and two outputs, and connects to the YAIC I/O pack. The 10 analog inputs accommodate two-wire, three-wire, four-wire, or externally powered transmitters. The analog outputs can be configured for 0 to 20 mA. Inputs and outputs have noise suppression circuitry to protect against surge and high frequency noise. The TBAI has three DC-37 pin connectors for three TMR I/O packs or one Simplex I/O pack.
The Analog I/O Terminal Board with YAIC I/O Pack Specifications table provides the specifications for the Analog I/O terminal boards available for use in the Mark VIeS Functional Safety System. For more information on the YAIC I/O pack and the STAI and TBAI terminal boards, refer to the chapter “PAIC, YAIC Analog I/O Modules” in the
document Mark VIeS Functional Safety Systems for General Market Volume II: System Guide for General-purpose Applications (GEH-6855_Vol_II).