SNAP-SCM-SSI OPTO 22, SNAP-SCM-SSI Datasheet

SNAP-SCM-SSI

Manufacturer Part Number

SNAP-SCM-SSI

Description

40T0077

Manufacturer

OPTO 22

Datasheet

1.SNAP-SCM-SSI.pdf (4 pages)

Specifications of SNAP-SCM-SSI

Voltage Rating

5VDC

Current Rating

200mA

Length

91.18mm

External Width

82.55mm

External Depth

18.8mm

Accessory Type

SSI Module

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Description

The SNAP-SCM-SSI module provides two individually isolated

serial synchronous interface (SSI) inputs for acquiring data

from linear or rotary transducers used in motion control.

The module can decode both binary and Gray Code, and is

software configurable to set clock speed, frame length, delay

time between data samples, and other parameters.

SNAP SSI modules mount alongside analog, digital, and other

serial modules on any SNAP PAC rack with a SNAP PAC brain

(EB or SB) or R-series controller. The brain or controller

processes the data from the module and can communicate

the data to other parts of an Opto 22 SNAP PAC System

another system (such as a Modbus

SNAP PAC racks accommodate up to 4, 8, 12, or 16 I/O

modules, with a maximum of 8 serial modules (including SSI

modules) on any one rack. Because the SNAP-SCM-SSI module

is mounted on these standard racks with other SNAP I/O

modules, you can use the combination of analog, digital, and

serial modules required by your application at the location

where they are needed.

NOTE: SSI modules require a SNAP PAC brain (either EB or SB)

or R-series controller with firmware version 8.5c or newer.

These modules do not work with legacy brains or controllers.

Configuration

You use PAC Manager, a free software utility, to configure the

SNAP-SCM-SSI. PAC Manager 9.0 or newer is required.

PAC Manager comes on a CD with every SNAP PAC brain and

controller and is also available for download from the Support

section of our website, www.opto22.com.

To install, configure, and use the SNAP-SCM-SSI, see form

#1931, the SNAP SSI (Serial Synchronous Interface) Module User’ s

Guide, available on our website.

Features

SNAP SSI (Serial

Synchronous Interface)

© 2011 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.

For motion control applications using linear or rotary

transducers

Dual, isolated serial synchronous interface (SSI) inputs

Software configurable

SALES 800-321-6786 • 951-695-3000 • FAX 951-695-3095 • sales@opto22.com • SUPPORT 800-835-6786 • 951-695-3080 • FAX 951-695-3017 • support@opto22.com

system or an OPC client).

™

or to

How the SNAP-SCM-SSI Samples Data

The SSI module outputs a high clock signal during idle, and it

samples SSI data on falling edges of the clock, starting after

the first rising edge. See the following diagram.

Example of data sample with out-of-range error bit

+Clock

+Data

Part Numbers

SNAP-SCM-SSI

First

sample

Part

Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com

Clock cycle (frame length)

Second sample

Error

SNAP 2-Channel Serial Synchronous

Interface Module

n-1

SNAP SSI Module

Description

Last sample

Idle

(inter-frame delay)

PAGE

Related parts for SNAP-SCM-SSI

SNAP-SCM-SSI Summary of contents

Page 1

... OPC client). SNAP PAC racks accommodate 12 I/O modules, with a maximum of 8 serial modules (including SSI modules) on any one rack. Because the SNAP-SCM-SSI module is mounted on these standard racks with other SNAP I/O modules, you can use the combination of analog, digital, and serial modules required by your application at the location where they are needed ...

Page 2

... Use twisted-pair, 24-gauge shielded cable with an additional pair for common (three pairs total). For complete installation information, see form #1931, the SNAP SSI (Serial Synchronous Interface) Module User’s Guide, available on our website. Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com PAGE SALES 800-321-6786 • ...

Page 3

... SNAP SSI (Serial Synchronous Interface) Module Dimensions SNAP-SCM-SSI Serial Synchronous Interface Module SALES 800-321-6786 • 951-695-3000 • FAX 951-695-3095 • sales@opto22.com • SUPPORT 800-835-6786 • 951-695-3080 • FAX 951-695-3017 • support@opto22.com © 2011 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations. ...

Page 4

... SNAP I/O I/O provides the local connection to sensors and equipment. Opto 22 SNAP I/O offers points of reliable I/O per module, depending on the type of module and your needs. Analog, digital, serial, and special-purpose modules are all mixed on the same mounting rack and controlled by the same processor (SNAP PAC brain or rack-mounted controller) ...

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