Synopsis

The VMIVME-4941 is a four-channel synchronous/rotary digitizer designed for use in modern high-performance commercial and industrial control systems.

Applications include motor control, radar antenna position information, CNC machine tools, robotic axis control and process control.

The VMIVME-4941 features four versatile, state-of-the-art synchronous or resolver digitizers with programmable resolution and bandwidth.

Programming allows selection of 10-, 12-, 14-, or 16-bit resolution with options for accuracy of +1 LSB (+4 LSB differential linearity) over two minutes.

Resolution programming combines the high tracking rate of a 10-bit converter with the accuracy of a 16-bit converter.

The four-way resolver digitizer board has functional test capability for operational verification of all resolver mixing modules and VMEbus control logic.

The user can provide input resolver test signals for board testing via the P2 VMEbus expansion connector.

The front panel fault LEDs are illuminated at power-up and can be programmed to go out after successful diagnostics.

The front panel status LEDs also indicate signal loss and error fault levels.

Front Panel Fault LED – If an error condition occurs during a board diagnostic test, www.ge-drive.com a software-controlled LED is available to visualize the fault.

This LED is illuminated at power-on reset and can be extinguished under program control.

Built-In Test (Resolver Option Only) – Requires the user to provide a resolver input on the P2 connector for loopback testing.

The loopback test is for single-ended signal input operation only. Note that the 11.8 V signal input option can be operated in direct input mode via a jumper.

Status LEDs are also provided to indicate signal loss and error levels for each channel.

The accuracy of the loopback test is limited (20 LSB) because the internal DC from the channel zero resolver is not available.

Loopback test accuracy is limited (20 LSB) because all four channels use the Channel Zero Resolver module’s internal DC reference voltage during built-in test runs.

Functional Features

Compliance: This product complies with the VMEbus specification Rev. C. 1. The helpers are as follows: A16: D32. D16. D08 (EO): 29. 2D: Slave 6U form factor

VMEbus Access: The address modifier bits are decoded to support unprivileged short I/O and supervisory short I/O access (switch optional).

Functional Block Diagram

Test Configuration

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