SNAP-SCM-W2 OPTO 22, SNAP-SCM-W2 Datasheet - Page 6

• Manufacturer Part Number: SNAP-SCM-W2
• Description: I/O Module
• Manufacturer: OPTO 22

Specifications of SNAP-SCM-W2

• Accessory Type: 2 Channel RS-485 Serial Communication Module
• Leaded Process Compatible: No
• Peak Reflow Compatible (260 C): No
• For Use With: Snap I/O Modules
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

INTRODUCTION
SNAP Serial Communication Module User’s Guide
Typical Applications
Typical applications for the SNAP-SCM-232 and the
SNAP-SCM-485-422 include interfacing with printers,
scales, chart recorders, and barcode systems.
•
•
The SNAP-SCM-W2 is ideal for security applications. It
complies with the Security Industry Association Access
Control Standard Protocol for the 26-bit Wiegand
Reader Interface. The module receives incoming data
from card readers, keypads, or other Wiegand devices.
The SNAP-SCM-PROFI integrates a PROFIBUS DP
network into your system. It uses a built-in DB-9
connector to provide a standard electrical interface
between Ethernet-based Opto 22 SNAP I/O systems
and PROFIBUS DP networks. For information on how to
integrate an Opto 22 controller with a PROFIBUS DP
network, see Opto 22 form #1591, the PROFIBUS DP
Master Technical Note.
What’s in this Guide?
This guide assumes that you have some familiarity with
Ethernet networking and serial communication. If you
are using a SNAP Wiegand module, you should be familiar with the Wiegand interface. If you are
using a SNAP PROFIBUS DP module, you should understand the PROFIBUS DP protocol. Commercial
resources are available for learning about these subjects. To learn more about the SNAP PAC System,
visit the Opto 22 website at www.opto22.com.
This guide includes the following sections:
•
•
•
NOTE: This guide does not cover SNAP-SCM-MCH16 or SNAP-SCM-SSI modules. For the
SNAP-SCM-MCH16, see form #1673, the SNAP PAC Motion Control User's Guide. For the SNAP-SCM-SSI, see
form #1931, the SNAP SSI (Serial Synchronization Interface) Module User’ s Guide.
The SNAP-SCM-232 interfaces to auxiliary serial
equipment via two RJ-45 plug-in data connectors,
providing two RS-232 serial ports. This model also
supports optional RTS/CTS flow control.
The SNAP-SCM-485-422 uses a simple
screw-type connector for easy wiring of two
2-wire RS-485 ports or one 4-wire RS-485/422
port.
Quick Start to get your serial module up and running quickly
Specifications
For those who need them, instructions for changing communication parameters, configuring
Wiegand modules and events, loading new firmware, and building cables.
®
®
SNAP-SCM-PROFI
SNAP-SCM-W2
Port A
Port B