SNAP-SCM-232 OPTO 22, SNAP-SCM-232 Datasheet
SNAP-SCM-232
Manufacturer Part Number
SNAP-SCM-232
Description
I/O Module
Manufacturer
OPTO 22
Type
Communicationr
Specifications of SNAP-SCM-232
Accessory Type
2 Channel RS-232 Serial Communication Module
Leaded Process Compatible
No
Peak Reflow Compatible (260 C)
No
Brand/series
SNAP Series
Connection To Host
Backplane
Current, Input
250 mA
Dimensions
82.55mmL×18.29mmW×69.85mmH
Module Type
Serial Communication
Number Of Channels
2
Primary Type
Control
Standards
CE Marked
Voltage, Isolation
750 VAC
Voltage, Supply
5 VDC
For Use With
Snap I/O Modules
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
SNAP Serial Communication
Modules
Description
The SNAP-SCM-232 and SNAP-SCM-485-422 serial
communication modules are part of the SNAP PAC System. They
conveniently provide two channels of serial data at a remote
Ethernet location.
Many applications require digital, analog, and serial data to provide
a complete solution. Traditionally, either separate serial network
cabling is required for the serial devices, or an expensive data
processor or PC must be used just to interface with the serial
devices.
SNAP serial communication modules eliminate this problem by
providing two channels of high-speed, isolated serial
communications packaged in the compact SNAP module form.
•
•
LED indicators are provided on each module to indicate Transmit
and Receive on each port.
Both SNAP serial communication modules work with SNAP PAC
Ethernet-based brains and rack-mounted controllers. (They do not
work with serial-based SNAP PAC brains.) These modules snap into
Opto 22 SNAP PAC mounting racks right beside digital and analog
Features
The SNAP-SCM-232 interfaces to auxiliary serial equipment
via two RJ-45 plug-in data connectors, providing two RS-232
serial ports. The module also supports optional RTS/CTS flow
control.
The SNAP-SCM-485-422 uses the standard SNAP removable
top-mounted connector for easy wiring of two 2-wire RS-485
ports or one 4-wire RS-485/422 port. The module has conve-
nient top switches for termination and bias.
SNAP-SCM-232: Two RS-232 serial ports with optional
RTS/CTS flow control
SNAP-SCM-485-422: Two RS-485 2-wire serial ports or
one RS-485/422 4-wire serial port
Individually isolated ports
Baud rates to 115 K Baud
Connection accessories provided
Works with the SNAP PAC System
Up to eight serial modules per rack
30-month warranty
modules, to provide the mix of analog, digital, and serial channels
you need at any location.
Typical applications include interfacing with printers, scales, chart
recorders, and barcode systems. Using the SNAP-SCM-232 or
SNAP-SCM-485-422 as a converter, these non-Ethernet devices can
be connected to an Ethernet network and be available for control,
monitoring, or data acquisition by any authorized PC or other device
on the network.
With the SNAP-SCM-232, a short (12-inch), unshielded twisted-
pair cable and both male and female RJ-45 to DB-9 adapters are
included for easy connection to all types of RS-232 devices.
For details on using these modules, see Opto 22 form #1191, the
SNAP Serial Communication Module User’s Guide.
Notes for legacy hardware: These SNAP serial communication
modules can also be used with SNAP Simple, SNAP Ethernet, and
SNAP Ultimate brains on an M-series or B-series rack. SNAP-SCM-
232 modules offering RTS/CTS flow control were manufactured in
June 2003 or more recently and require I/O processor firmware
version 5.0 or newer. The SNAP-SCM-485-422 also requires
firmware 5.0 or newer. An older module part number, SNAP-SCM-
485, supported 2-wire RS-485 only.
Part Numbers
SNAP-SCM-485-422
SNAP-SCM-232
Part
SNAP Serial Communication
Two-channel RS-232 serial
communication module
Two-channel RS-485 (two-wire) or
single-channel RS-485/422 (four-wire)
serial communication module
Modules
Description
PAGE
1
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SNAP-SCM-232 Summary of contents
Page 1
... Ethernet network and be available for control, monitoring, or data acquisition by any authorized PC or other device on the network. With the SNAP-SCM-232, a short (12-inch), unshielded twisted- pair cable and both male and female RJ-45 to DB-9 adapters are included for easy connection to all types of RS-232 devices. ...
Page 2
... Specifications Baud rates Channel-to-channel isolation Logic supply voltage Logic supply current Number of ports per module Max. number of modules per rack 8 Maximum cable length, point-to- point (SNAP-SCM-232) Maximum cable length, multidrop (SNAP-SCM-485-422) Operating temperature Storage temperature PAGE 2 SNAP Serial Communication Modules 300–115,200 ...
Page 3
... Dimensions SNAP-SCM-485-422 Serial Communication Module PAGE 4 SNAP Serial Communication Modules ...