GE Multilin VMIVME-2536 Optically Coupled Digital Input/Output Interface

Features

- 32 optically coupled outputs

- 32 optically coupled inputs

- High isolation potential - 1kV continuous - 35kV pulsed

- 8-bit, 16-bit, 32-bit data transfer

- Standard data or short I/O addressing A16 or A24

- Voltage-sensing or contact-sensing inputs

- Input range 5 to 125VDC

- 300mA sink current output

- Maximum output voltage 50V

- Inputs and outputs support built-in testing

Functional Features

Board Features: The board has 32 optically coupled inputs and 32 optically coupled outputs.

The outputs and inputs have built-in testing and provide continuous 1kV system isolation for the VME backplane.

Compliance The board conforms to the VMEbus specification ANSI/IEEE STD 1014-1987 IEC 821 and 297 with the following helpers:

a24/a16. d32/d16/d08 (eo)

Slave devices using the following address modifiers:

3D, 39/2D, 29.

BUILT-IN TEST: The VMIVME-2536 supports both on-line and off-line built-in tests (BIT).

By setting a bit in the Control and Status Register (CSR), the input will enter test mode.

In test mode, data placed in the on-board test registers is read through the input port instead of field data.

The address of the test register is the same as the address of the input data port.

The address of the test register is the same as the address of the input data port, so testing can be accomplished by simply writing to and reading from the input data port. This feature can be used for both on-line and off-line testing.

The contents of the output data register can be read at any time, thus supporting online testing. The outputs can be put into offline test mode by setting a bit in the CSR.

In offline test mode, all open collector outputs are disabled. Data patterns can then be written to or read from the output registers to perform tests without affecting the outputs.

Input Characteristics

Input Configuration: Inputs can be either voltage sense or contact sense. Voltage sense or contact sense can be set by byte boundary.

For contact sensing, a user-supplied SIP resistor must be installed.

External voltage or internal VME +5V can be jumper-selected on byte boundaries to power the contact detection mode. Note that VME +5V is only available for the 5V input option.

Input Voltage Options: The input voltage range is a manufacturing option. Available ranges are 5. 12. 24. 28. 48. and 125V.

See Tables 1 through 5 and refer to Ordering Options for details.

Input Isolation: 10MΩ minimum

Isolation Voltage(1): 1.000V continuous; 3.500V one second, field to VME.

Maximum continuous voltage between channels is 500V.

Contact dithering: User programmable dithering.

Dither times are 0. .256. .512. 1.024. 2.048. 4.096. 8.192. and 16.384 milliseconds.

16.384 milliseconds. De-dithering defaults to 0 on reset.

Output Characteristics

Output Configuration: Outputs are optically isolated open collector. User installable pull-up resistors at byte boundaries.

An external voltage or internal VME +5V can be jumper-selected on the byte boundary to power the pull-up resistor.