GE VMIVME-4941Quad-Channel Synchro/Resolver-to-Digital Converter

GE VMIVME-4941Quad-Channel Synchro/Resolver-to-Digital Converter

INTRODUCTION 

The VMIVME-4941 is a  quad-channel Synchro/Resolver-to-Digital Converter  designed for use in modern high-performance commercial  and industrial control systems. Applications include motor  control, radar antenna position information, CNC machine  tooling, robot axis control, and process control.The VMIVME-4941 utilizes four versatile  state-of-the-art Synchro or Resolver-to-Digital Converters  featuring programmable resolution and bandwidth.  Programming allows selection of 10-, 12-, 14-, or 16-bit  resolution, and options are available with accuracy to two  minutes +1 LSB (+4 LSB differential linearity). Resolution  programming combines the high tracking rate of 10-bit  converters with the precision of 16-bit converters.The Quad Resolver-to-Digital Converter Board is  designed with functional test capability for operational  verification of all resolver hybrid modules and the VMEbus  control logic. The user may provide an input resolver test  signal through the P2 VMEbus expansion connector for board  testing. A front panel Fail LED is illuminated at powerup and  may be extinguished via program control after diagnostics  are successfully executed. Front panel status indicators are  also provided to indicate a loss of signal and level of error  faults.

SPECIFICATION

• Quad S/D or R/D converters (single channel option) 

• Tracking rates up to 800 rps minimum (48,000 rpm) for resolvers or 160 for  synchros 

• Software-programmable resolution (10-, 12-, 14-, or 16-bit) • Software-programmable bandwidth (530 Hz, 130 Hz) 

• 16-bit pitch counter per channel 

• 8-, 16-, or 32-bit data transfer 

• Reference frequency from 360 Hz (low bandwidth) to 6 kHz for resolvers 

• Accuracy to ±2.3 arc minutes available (optional) 

• Double Eurocard form factor 

• Functional Built-in-Test capability for resolver input options 

• LEDs indicate signal present, error exceeds 65 bits, and board fail

FRONT PANEL FAIL LED

If an error condition  occurs during a board diagnostic test, a software-controlled  LED may be used to visually indicate a failure. The LED is  illuminated upon powerup reset and can be extinguished  under program control.

BUILT-IN-TEST (RESOLVER OPTIONS ONLY)

Requires a user-supplied resolver input on the P2 connector  for loopback testing. Loopback testing applies only for  single-ended signal input operation. Note the 11.8 V signal  input option can be jumpered to operate in a direct input  mode. Status LEDs are also provided to indicate a loss of  signal and level of error for each channel. The accuracy of  loopback testing is limited (20 LSB) since the internal DC  reference voltage from the channel zero resolver module is  used for all four channels during Built-in-Test operation.

FUNCTIONAL CHARACTERISTICS

VMEbus Access: Address modifier bits are decoded  to support nonprivileged short I/O and supervisory short  I/O access (switch selectable).

Register Addressing: S/R data (16 bits) and pitch  counter (16 bits) can be read as a single 32-bit  doubleword. All registers can also be accessed as 16-bit  words or 8-bit bytes.

BOARD CONFIGURATION

Board Address: The physical address for the board is  determined by the setting of an 11-bit DIP switch.  VMEbus address lines A05 through A15 are decoded for  board selection.

A15 to A5: Selected with DIP switches

A4 to A0: Used for register selection

SYNCHRO INPUTS

Reference Voltage Input: 4 to 130 VRMS

Reference Input Impedance: 110 k nominal, 100 K  minimum, single-ended

PHYSICAL/ENVIRONMENTAL

Temperature Range: 0 to +55 ˚C, operating  -20 to +85 ˚C, storage

Relative Humidity Range: 20 to 80 percent,  noncondensing

Power Requirements: +5 V at 2 A ±15 V (5 percent tolerance) at 100 mA1