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$545.00 (USA and Canada only)

Availability: In stock

Production Specification

The SNAP-SCM-PROFI module is a high-speed serial communications module that provides a standard electrical interface between the Ethernet-based SNAP PAC System and PROFIBUS DP® networks.

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.

LEDs indicate Transmit and Receive activity on the port, as well as power and operation status.

In order to facilitate system integration using a SNAP-SCM-PROFI module with a SNAP PAC controller running PAC Control software, Opto 22 provides PROFIBUS DP Master Software. For more information, see Opto 22 form #1591, the PROFIBUS DP Master Technical Note, under the Documents tab.

Note for legacy hardware: This module can also be used on SNAP M-series and B-series racks and is compatible with legacy SNAP Ethernet, SNAP Simple, and SNAP Ultimate I/O.

Build your system in the SNAP I/O Configurator.

Baud rates

9600 to 1.5 MBaud*

Channel-to-channel isolation

750 Vrms

Logic supply voltage

5.0 VDC

Logic supply current

250 mA

Number of ports per module


Maximum number of modules per rack*


Processor compatibility

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


Processor firmware

Firmware 6.1c or newer required

Operating temperature

Storage temperature

-20 to 70 °C

-30 to 85 °C

Torque, hold-down screws

Not to exceed 1 in-lb (0.11 N-m)

Torque, connector screws

5.22 in-lb (0.59 N-m)

Agency Approvals



30 months

Maximum number of modules per rack assumes a 4A power supply (for example, SNAP-PS5). Each rack backplane provides approximately 2.5 Mbps of bandwidth.

** With Opto 22 SNAP power supply and SNAP rack

SNAP Profibus Communication Module Data Sheet

The SNAP-SCM-PROFI module is a high-speed serial communications module that provides a standard electrical interface between Opto 22's Ethernet-based SNAP PAC System and PROFIBUS DP® networks. The SNAP-SCM-PROFI module is designed for use with Opto 22’s SNAP PAC R-series controllers and SNAP PAC EB brains, both the standard wired models and the Wired+Wireless models.

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 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 SNAP 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.

Opto 22 RoHS 3 Statement of Compliance - Restriction of Hazardous Substances

This document is a statement of compliance with the EU Directive 2015/863/EU, Restriction of Hazardous Substances (RoHS 3). This document lists Opto 22 products that comply with the substance restrictions of the RoHS 3 directive.

Profibus-DP Master Technical Note

This technical note describes how to install and configure the Opto 22 Profibus-DP® Master Software in order to use Opto 22’s PAC Control to monitor and control a Profibus-DP network through a SNAP-SCM-PROFI module.

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.

Firmware for SNAP-SCM-PROFI module

Firmware for the SNAP-SCM-PROFI module for Profibus communication.

PROFIBUS-DP Master software example

The Opto 22 PROFIBUS DP® Master is a software example of how to use Opto 22’s ioControl or PAC Control software to monitor and control a PROFIBUS DP network through a SNAP-SCM-PROFI module. The example includes a configuration utility and an example ioControl strategy.

Note: Before you download, read the Legal Agreement.

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.

Accuracy vs Resolution

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