Series AVME9125 VMEbus 6U Analog Input Board
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Please refer to Acromag's Service Policy Bulletin or contact
Acromag for complete details on how to obtain parts and repair.
PRELIMINARY SERVICE PROCEDURE
Before beginning repair, be sure that all of the procedures in
Section 2, Preparation For Use, have been followed. Also, refer to
the documentation of your board to verify that it is correctly
configured. Replacement of the board with one that is known to
work correctly is a good technique to isolate a faulty board.
CAUTION: POWER MUST BE TURNED OFF BEFORE
REMOVING OR INSERTING BOARDS
Acromag’s Applications Engineers can provide further
technical assistance if required. When needed, complete repair
services are also available from Acromag.
6.0 SPECIFICATIONS
PHYSICAL
Physical Configuration....................AVME9125 (6U)
Length......................................9.187 inches (233.3 mm)
Width....................................…6.299 inches (160.0 mm)
Board Thickness......................0.062 inches (1.59 mm)
Max Component Height.......….0.550 inches (13.97 mm)
Recommended Card Spacing..0.800 inches, (20.32mm)
Connectors:
P1 (VMEbus)..........…..............DIN 41612 96-pin Type C,
Level II.
P2 (VMEbus).......................….DIN 41612 96-pin Type C,
Level II.
Power:
The AVME9125 board individually f5V from the
VMEbus. On-board +15V and -15V supplies are also
individually filtered.
The power supply filters are typically capable of attenuating
undesirable noise and oscillations in the high frequency range.
Current:
+5 Volts (
±
5%)....................…..AVME9125 450mA, Typical
600mA, Maximum.
VMEbus COMPLIANCE
Specification..................................This device meets or exceeds
all written VME specifications
per revision C.1 dated October
1985, IEC 821-1987 and IEEE
1014-1987.
Data Transfer Bus..........................A16:D16/D08 (EO) DTB
slave; supports Read-Modify-
Write cycles.
VMEbus Access Time...................800nS Typical (all board
registers); measured from the
falling edge of DSx* to the
falling edge of DTACK*.
VMEbus Address Modifier Codes:
Short I/O Space.............................Base address is hardware
jumper selected. Occupies
256 bytes. Responds to both
address modifiers 29H & 2DH
in the VMEbus short I/O space
for board registers
Interrupts.......................................Creates I(1-7) programmable
request levels
D16/D08(O) interrupter.
Board control & status register
interrupt monitoring. Interrupt
release mechanism is Release
On Acknowledge (ROAK)
type.
Interrupt Events......................….....Vectored Interrupt on end of
channel conversion or end of
group of channel conversions
ANALOG INPUTS
Input Channels (P2 Access).…...32 Differential Channels
Input Signal Type.........................Voltage (Non-isolated).
Input Range Bipolar……………...-10 to +10 Volts
Input Overvoltage Protection........VSS - 20 V to VDD + 40 V with
Power ON.
-35 V to +55 Volts Power OFF
Input Resistance..........................100 M
Ω
, Typical.
Input Bias Current........................1nA., Typical.
Common Mode
Rejection Ratio (60Hz).....….........90 dB., Typical.
Channel to Channel
Rejection Ratio (60Hz)......…........90 dB., Typical.
(ADC) ADS7809UB @25
°
C:
ADC..........................................….Burr-Brown ADS7809UB
A/D Resolution..............................16-bits.
No Missing Codes...........…..........No Missing Codes 15bits
ADC
A/D Integral Linearity Error...…....
±
1 LSB Typical,
±
2 LSB Maximum ADC
Bipolar Offset Error
1
.....................
±
10mV Max, for
±
10V Range
Full Scale Error
1
.......................….
±
0.5
%
Maximum.
Note 1. Software calibration eliminates these error components.
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