Impulse SCM9B-3000_4000 Series - Manual

Isolated Intelligent Signal Conditioning Products SCM9B
For information call 800-444-7644 110
SCM9B-3000/4000 Series
Computer-to-Analog Output Modules
Description
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.
Figure 1: SCM9B-3000/4000 Block Diagram
▲
Features
• 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
• Baud Rates: 300 to 38,400
• 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
Programmable Features (4000 Series)
(Provides intelligent features not found in the 3000 Series)
• Fully Programmable Output Slopes: 0.01V/s (mA/s) to
10,000V/s (mA/s)
• Programmable Data Scaling to any Desired Units
• True Analog Readback of Output Signal
• Programmable Starting Value
• Programmable Watchdog Timer Provides Orderly
Shutdown in the Event of Host Failure