Pepper-computer Modular Computers RS485 Bedienungsanleitung PDF herunterladen (Seite 299)

SMART I/O User’s Manual

Chapter 6 Communications Modules

† All outputs are referenced to the common Ext. Vcc

6.2 SM-SSI

6.2.1 Introduction

The SM-SSI is an optoisolated single-channel, 24-bit RS422 interface for

absolute encoders. Configurable data input together with flexibility afforded

by software configurable encoder types transforms this SMART Module into

an intelligent interface suitable for the most demanding applications. Data

flow is indicated by the presence of two red LEDs on the front panel.

6.2.2 Specifications

Isolation 2.5 kV optoisolated from the system

Input 1 optoisolated SSI channel, 24-bit binary or Gray code

(software configurable), RS422 type

2 optoisolated 24V DC digital inputs for common GND and

End-of-Range switches with readback and IRQ support

Output† 2 optoisolated 24V DC/300mA digital outputs for Encoder

Reset and Encoder Direction

1 optoisolated 24V DC/300mA digital output for Match

SSI Interface None, Even or Odd (software configurable), Data, Parity

Software configurable (data bits, parity) encoder type

Software detection of line break

SSI defined, RS422 type Clock Output

62.5, 125, 250 or 500kHz (programmable) Tx. Pulse Freq.

Data flow controlled by software and indicated by LED status

Up to 24-bit Compare Register with pass-through compare

Interrupt, software and LED control of Match Result

Front Panel 2 Red LEDs indicating MATCH and data conversation

Ext. Vcc 24V DC (±5%)

Power Cons. 325 mW (min.), 375mW (max.)

Temperature Range Standard (0˚C to +70˚C), Extended/Storage (-40˚C to +85˚C)

Operating Humidity 0% to 95% (non-condensing)

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Pepper-computer Modular Computers RS485 Bedienungsanleitung Seite 299