SNAP-SCM-485-422

Availability: In stock
SNAP 2-Ch RS-485/422 (2-wire or 4-wire) Serial Communication Module

Please call (800) 321-6786 to order.

SNAP-SCM-485-422

Production Specification

The SNAP-SCM-485-422 provides two 2-wire RS-485 serial communication ports for two channels of high-speed, isolated serial data, or one 4-wire serial communication port for a single channel. Used with a brain or R-series controller, the module connects serial devices such as printers, scales, chart recorders, and barcode systems to an Ethernet network for control, monitoring, or data acquisition.

Part of the SNAP PAC System, the module mounts on a SNAP PAC rack with a SNAP PAC brain or rack-mounted controller. Analog, digital, and serial I/O modules can all be on the same rack. Such an I/O unit is also well suited for PC-based control or for use as intelligent remote I/O for an Allen-Bradley MicroLogix PLC system, or other RSLogix-based system, such as ControlLogix or CompactLogix.

NOTE: The SNAP-SCM-485-422 is also compatible with SNAP Ethernet, SNAP Simple, and SNAP Ultimate brains.

For similar serial communication using RS-232, see SNAP-SCM-232.

Build your system in the SNAP I/O Configurator.

Baud rates

300–115,200*

Channel-to-channel isolation

750 VRMS

Logic supply voltage

5.0 VDC

Logic supply current

250 mA DC

Number of ports per module

2 (1 if SNAP-SCM-485-422 in 4-wire mode)

Max. number of modules per rack**

8

Maximum cable length, point-to-point (SNAP-SCM-232)

50 feet

Maximum cable length, multidrop (SNAP-SCM-485-422)

1,000 feet at 115,200 Kbd

Processor compatibility

SNAP PAC R-series controllers and SNAP PAC EB brains, both standard wired and Wired+Wireless models.

Also SNAP-B3000-ENET, SNAP-ENET-RTC, SNAP-ENET-S64, SNAP-UP1-ADS, and SNAP-UP1-M64.

Operating temperature

-20 to 70 °C

Storage temperature

-30 to 85 °C

Torque, hold-down screws

4 in-lb (0.45 N-m)

Torque, connector screws

5.26 in-lb (0.6 N-m)

Agency Approvals

UL, CE, ATEX, FM, RoHS, DFARS

Warranty

30 months

* Module performance is limited by the number of serial modules on the SNAP rack. Each rack backplane provides approximately 2.5 Mbps of bandwidth.

** Maximum number of modules per rack assumes an Opto 22 SNAP power sup­ply and SNAP rack.

SNAP PAC System Product Guide

This document lists and describes all Opto 22 SNAP PAC System part numbers, including PAC Project software, SNAP PAC controllers, SNAP PAC brains, and SNAP I/O modules of all kinds. SNAP PAC mounting racks and SNAP power supplies are also listed.

SNAP Serial Communication Modules Data Sheet

SNAP serial communication modules are designed for use with the SNAP PAC System and can also be used in I/O units without a controller. Each module provides one or two channels of serial data—RS-232 or RS-485/422—at a remote Ethernet location, on the same mounting rack with digital and analog I/O.

This document describes the SNAP-SCM-232 and SNAP-SCM-485-422 serial communication modules.

SNAP SCM Module Firmware README

This README file lists revision changes made to the SNAP-SCM-232 (REVISION A)and SNAP-SCM-485-422 (REVISION A) modules.

SNAP Serial Communication Modules User's Guide

The SNAP-SCM-232, SNAP-SCM-485-422, SNAP-SCM-PROFI, SNAP-SCM-W2, SNAP-SCM-CAN2B, and SNAP-SCM-ST2 serial communication modules are designed for use with the SNAP PAC System and can also be used in standalone I/O units. Each of these modules conveniently provides serial data at a remote Ethernet location.

  • - The SNAP-SCM-232 and SNAP-SCM-485-422 typically interface with printers, scales, chart recorders, and barcode systems.
  • - The SNAP-SCM-PROFI provides a standard electrical interface with PROFIBUS DP® networks.
  • - The SNAP-SCM-CAN2B provides an interface to a Controller Area Network (CAN), so your SNAP PAC system can receive data from CANbus devices.
  • - The SNAP-SCM-ST2 provides pulse and direction signals for stepper motor drives.
  • - The SNAP-SCM-W2 complies with the Wiegand interface format and is used for access control applications.

Declaration of Conformity (ATEX, EMC, LVD, RoHS)

This document is the Manufacturer's Declaration of Conformity for the products listed herein, in accordance with European, international, and/or national standards and regulations.

CE Declaration: ATEX

This document is the Manufacturer's Declaration for the listed products as mentioned in the attachment - to which this confirmation refers - that they are in accordance with the mentioned European, international and/or national standards and regulations.

Opto 22 RoHS 2 Statement of Compliance - Restriction of Hazardous Substances

This document is a statement of compliance with the EU Directive 2011/65/EU, Restriction of Hazardous Substances (RoHS 2). This document lists Opto 22 products that comply with the substance restrictions of the RoHS2 directive.

FM Approval Document

This document lists all Opto 22 part numbers that have Factory Mutual (FM) approval.

UL Approval Document

This document lists all Opto 22 part numbers that have the Underwriters Laboratory (UL) approval.

CE Declaration: Component

This document is the Manufacturer's Declaration for the listed products as mentioned in the attachment - to which this confirmation refers - that they are in accordance with the mentioned European, international and/or national standards and regulations.

CE Declaration: Low Voltage

This document is the Manufacturer's Declaration for the listed products as mentioned in the attachment - to which this confirmation refers - that they are in accordance with the mentioned European, international and/or national standards and regulations.

SerMod_RevA_R2.0a.eio

This file contains firmware for SNAP-SCM-485-422 and 'REVISION A' SNAP-SCM-232 serial communication modules. This firmware includes hardware flow control capability for the 'REVISION A' SNAP-SCM-232 module, and 4-wire mode for the SNAP-SCM-485-422 module.

Video: Securing SNAP Module

A quick overview on securing a SNAP Module to a SNAP rack.

Video: Removing a SNAP Module

A quick overview on removing a SNAP module.

Demo: Accuracy vs Resolution

What's the difference between accuracy and resolution in analog I/O specifications? Try your own specs in the calculator.