Overview

Introduction

Features

The VMIVME-4140 Analog Output Board has 32 analog output channels with 12-bitresolution, sourcing up to 10 mA at 10 V. Each output has a dedicatedDigital-to-Analog Converter (DAC) assigned to it. The analog outputs can be disconnected from the field wiring for off-line testing. 

Calibration and self-test are initiated by a VMEbus system reset or by execution of a software command. 

During calibration, a table of offset and gain coefficients is compiled and stored in RAM. 

There is an entry for offset and gain corresponding to each of the 32-channelsconfigured in each of the 6 output voltage rangesThe VMIVME-4140 has the following features:· 32 Analog output channels

- 10 mA maximum output current per channel- One 12-bit Digital

-to-Analog Converter (DAC) per output channel

- 0.8S2 output impedance (typical) Random update (non-scanning) or synchronous update (external or software)Automatic calibration initiated by system reset or by software commandUnipolar (0 to +10 V,0 to +5 V, or 0 to +2.5 V) or bipolar (+2.5, +5, or +10 V)software selectable voltage ranges· Discrete wire or mass terminated cables· Self

-Test

- Extensive on-board diagnostic testing capability · Outputs can be disconnected from the field Front panel status LED· Front panel analog output connector· Front panel reference voltage access· Front panel reference voltage adjustment.

Safety Summary

The following general safety precautions must be observed during all phases of the operation, service, and repair of this product. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture, and intended use of this product.

VMIC assumes no liability for the customer's failure to comply with these

requirements.

Ground the System

To minimize shock hazard, the chassis and system cabinet must be connected to an electrical ground. A three-conductor AC power cable should be used. The power cable must either be plugged into an approved three-contact electrical outlet or used with a three-contact to two-contact adapter with the grounding wire (green) firmly connected to an electrical ground (safety ground) at the power outlet.

Do Not Operate in an Explosive Atmosphere

Do not operate the system in the presence of flammable gases or fumes. Operation of any electrical system in such an environment constitutes a definite safety hazard.

Keep Away from Live Circuits

Operating personnel must not remove product covers. Component replacement and internal adjustments must be made by qualified maintenance personnel. Do not replace components with the power cable connected. Under certain conditions, dangerous voltages may exist even with the power cable removed. To avoid injuries, always disconnect power and discharge circuits before touching them.

Do Not Service or Adjust Alone

Do not attempt internal service or adjustment unless another person, capable of

rendering first aid and resuscitation, is present.

Do Not Substitute Parts or Modify System

Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized modification to the product. Return the product to VMIC for service and repair to ensure that safety features are maintained.

Dangerous Procedure Warnings

Warnings, such as the example below, precede only potentially dangerous procedures throughout this manual. Instructions contained in the warnings must be followed.

Extreme caution when handling, testing, and adjusting

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