The AT family of 6U VME Discrete I/O boards are designed to provide users with a high degree of reliability and flexibility to meet input-output requirements. The AT-VME-DIO boards provide an economical method for isolation and interfacing of I/O signals to the VME bus. Optical-relays, which are built-in, are provided for each I/O channel. These eliminate the expenses incurred due to the usage of external relay panels. They are ideally suited for stringent military and airborne applications.

On-board relays isolate all the inputs, outputs and the VMEbus from each other against all sorts of transients emanating from ground loops etc. The AT-VME-DIO provides 32 channels of isolated inputs and 32 channels of isolated outputs. The voltage levels supported are TTL and Open Collector voltages. Also available on the board are 2 serial asynchronous RS-422 channels. These have a programmable baud rate up to 115.2 k/Bauds.

HARDWARE

The AT-VME-DIO boards meet the VME 64x standard and are available in a 6U form factor. The boards are available in three variants – Commercial, Air-Cooled and Conduction-Cooled versions. It is designed to work in units meeting MIL-STD-461C for EMI/EMC and MIL-STD-810F for airborne applications. All the components used are of MIL grade quality as per airborne application requirements in the conduction-cooled version. Front panel and Rear I/O connectivity options are provided for commercial and air-cooled boards. Conduction-cooled boards are available with Rear I/O connectivity only.

Discrete I/O

• 32 Channels of Opto-Isolated Inputs
• 32 Channels of Opto-Isolated Outputs
• One optocoupler / channel
• Minimum isolation of 500 V
• Non-isolated VME boards also available
• Voltage level: TTL Logic, Open Collector 0-48V
• Rear I/O Connectivity on P2
• 2 RS-232 or 2 RS-422 or 1 each of RS-232/422 Asynchronous Channels
• Programmable standard baud rates up to115.2 k/Bauds

Mechanical Format

• Commercial/Development version- Standard VME
• Air-cooled version- As per ANSI/VITA 1-1994
• Conduction-cooled version- As per IEEE 1101.2

Dimensions

• Dimensions- 233mm x 160mm
• IEEE 1101.2 single-slot board with 0.8-inch centers

VME Interface

• VME 64x, 6U form factor
• A24/D16 interface

Power

• Consumption: 2.25 watts
• 5V @ 450mA

Interrupts

• Programmable interrupter 7 levels
• Samples & compares periodically the status of the I/O channels
• For every change, VME bus interrupt is asserted

Software Support

• Driver and high-level API libraries for Windows XP, Linux, RT-Linux, LynxOS 4.0 and VxWorks 5.5
• Virtual Instrument Panels for interactive control of Discrete I/O and UART features
• Self-test and built-in test features provided

Diagnostics

• Built-In-Test (BIT) of all on-board TTL chips
• Wrap around loops to verify correct board operation

Environmental

• Wrap around loops to verify correct board operation

	A	B	C	+
1
2		Air Cooled	Conduction Cooled
3	Operating Temperature	0°C to +60°C	-40°C to +85°C
+

 

Ruggedization

• Series ‘C’: Commercial/Development Version
• Series ‘A’: Air-Cooled Version
• Series ‘M’: Military / Conduction-Cooled Version

Warranty

• 1 year limited warranty

Hardware Selection