SCM9B-3000/4000: Computer-to-Analog Output Modules. Dataforth

Specialists in data acquisition, signal conditioning and data communication

English

The SCM9B-3000/4000 series are complete computer-to-analog output interfaces. They are designed to be mounted remotely from a host computer and communicate, in ASCII, with standard RS-232 and RS-485 serial ports. Simple ASCII commands are used to control a 12-bit DAC (Digital-to-Analog Converter) which is scaled to provide commonly used current and voltage ranges. An 8-bit CMOS microprocessor provides an intelligent interface between the host and the DAC. The 3000/4000 are compatible with the 1000/2000 input modules and may be mixed in any order.

The modules are easy to use. You do not need engineering experience in complicated data acquisition hardware. This modular approach to data acquisition is extremely flexible, easy to use and cost effective. The modules can be mixed and matched to fit the application. They can be placed remote from the host and from each other. You can string up to 124 modules on one set of wires.

Although software is not required, utility software (SCM9B-S1000) is available on IBM-compatible diskette to make the 3000/4000 easier to learn and use. S1000 software is provided at no charge on request with a purchase order and is not copy protected.

Analog Output Ranges: 0-1V, ±1V, 0-5V, ±5V, 0-10V, ±10V, 0-20mA, 4-20mA
Communicates in ASCII with RS-232 or RS-485 Serial Ports
Programmable High/Low Output Limits
500Vrms Output Isolation
12-bit Output Resolution
Scaling in Engineering Units
Data Rates: 300 to 38,400bps
Nonvolatile Digital Calibration
Output Protection: 240VAC (Current Output) ±30V (Voltage Outputs)
Direct Connection to ‘Dumb’ Terminals or Modems
Requires +10 to +30VDC Unregulated Supply
May be Located up to 10,000 Feet from Host (RS-485)
Addressable: up to 124 Units per Serial Port
"Bumpless" Manual Control Inputs
CE Compliant

SCM9B-3100-4100

Part Number	Input Range	Output Range	Mechanical Format	Isolation Voltage	Isolation Type	Accuracy	Supply Voltage
SCM9B-3121 Order Now	RS-232C	-1 to +1 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-3122 Order Now	RS-485	-1 to +1 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-3131 Order Now	RS-232C	-5 to +5 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-3132 Order Now	RS-485	-5 to +5 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-3141 Order Now	RS-232C	-10 to +10 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-3142 Order Now	RS-485	-10 to +10 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-3161 ² Order Now	RS-232C	0 to +1 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-3162 ² Order Now	RS-485	0 to +1 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-3171 Order Now	RS-232C	0 to +5 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-3172 Order Now	RS-485	0 to +5 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-3181 Order Now	RS-232C	0 to +10 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-3182 Order Now	RS-485	0 to +10 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-4121 ² Order Now	RS-232C	-1 to +1 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-4122 Order Now	RS-485	-1 to +1 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-4131 ² Order Now	RS-232C	-5 to +5 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-4132 Order Now	RS-485	-5 to +5 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-4141 Order Now	RS-232C	-10 to +10 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-4142 Order Now	RS-485	-10 to +10 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-4161 Order Now	RS-232C	0 to +1 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-4162 ² Order Now	RS-485	0 to +1 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-4171 Order Now	RS-232C	0 to +5 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-4172 Order Now	RS-485	0 to +5 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-4181 Order Now	RS-232C	0 to +10 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC
SCM9B-4182 Order Now	RS-485	0 to +10 V	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way	±0.1% of FS max	10 to 30 VDC

² ... Discontinued

SCM9B-3200-4200

Part Number	Input Range	Output Range	Mechanical Format	Isolation Voltage	Isolation Type
SCM9B-3251 Order Now	RS-232C	0 to 20 mA	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way
SCM9B-3252 Order Now	RS-485	0 to 20 mA	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way
SCM9B-3261 Order Now	RS-232C	4 to 20 mA	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way
SCM9B-3262 Order Now	RS-485	4 to 20 mA	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way
SCM9B-4251 Order Now	RS-232C	0 to 20 mA	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way
SCM9B-4252 Order Now	RS-485	0 to 20 mA	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way
SCM9B-4261 Order Now	RS-232C	4 to 20 mA	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way
SCM9B-4262 Order Now	RS-485	4 to 20 mA	Plug-in or hockey puck	500 Vrms	Transformer / Optical 2-way

Frequently Asked Questions

Can Dataforth provide calibration reports for modules I purchased?

Yes we can provide calibration reports for the modules that you purchased.

You can either
a) visit https://www.dataforth.com/TestDataReport.aspx to search for Test Report Datasheets by Serial Number or
b) you can send us a list of model numbers and their serial numbers to support@dataforth.com

Analog Devices announced a last time buy and discontinuance of their signal conditioning modules. Can I replace them with Dataforth signal conditioning modules?

Yes, in general, Dataforth signal conditioning modules are a direct replacement for all Analog Devices signal conditioning modules. e.g. "SCM5B35-xx: Linearized 4-Wire RTD Input Modules" will replace Analog Devices "5B35: Isolated 4 Wire RTD Input Signal Conditioning Module".

Please note that Dataforth signal conditioning modules are RoHS II compliant.

How does the load resistance of a module affect the noise at the output?

Noise at the output of a module is independent of load resistance.

If the input range of my signal conditioner is -1V to +1V and the output range is 0 to 10V, does this mean that it ignores polarity?

A signal conditioner with these I/O ranges does not mean that the module ignores the polarity of your voltage input. The output of voltage input modules are scaled linearly, meaning an input of -1V would correspond to an output of 0V, an input of 0V would correspond to an output of 5V, an input of +1V would correspond to an output of 10V, and so on.

How do I convert an RMS voltage to its corresponding peak voltage?

To convert an RMS voltage to its corresponding peak voltage, you simply take the RMS voltage value and multiply it by the square root of 2, or roughly 1.414.

For example, 1500Vrms corresponds to a peak voltage of 1500 * 1.414 = 2121 Vp

Due to resource constraints on my computer, I'm unable to open the three dimensional CAD models provided on your website. Does Dataforth provide two demensional CAD models for download as well?

Two dimensional CAD models can be generated upon customer request. Please contact Customer Service for assistance.

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Dataforth offers a wide range of custom modules for those instances when our standard commercial off-the-shelf (COTS) solutions don't quite meet your specific application needs. Contact Customer Service and Application Support to discuss design guidelines and design feasibility. Customer Service and Application Support can be reached at sales@dataforth.com or +1-800-444-7644.

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