National Instruments OAC5, OAC5A, ODC5

SSR Series Modules and Backplanes 8

National Instruments Corporation

Figure 6. Crouzet 16 Module Backplane Jumper Locations

Figure 7. Crouzet 24 Module Backplane Jumper Locations

Note The Crouzet 32 module backplane has no position on the backplane for either a

fuse or jumper. Y ou must add a power supply fuse elsewhere bef ore connecting the

power. Use a fuse that is suitable for your application.

SSR Module Installation

You can install the SSR modules by plugging each module into one of the

positions on an SSR backplane. They are keyed so they cannot be inserted

incorrectly. Many DAQ devices require that all DIO lines in a port be

configured either for input or output. In these cases make sure you install

the same type of SSR module, input or output, for each line in the port.

You can mix input and output SSR modules on the mounting rack only if

you connect them to different I/O ports or you use a DAQ device that allows

mixed line directions within a port. Do not attach input modules to output

lines under any circumstances or you can damage the SSR modules or the

DAQ device.

LEDs

Each module position of an SSR backplane has a status LED to show the

status of the SSR module logic line. For input modules, the LED is on when

the load voltage is within the specified range of the SSR module. For the

1 External Power Jumper 2 DAQ Device Power Jumper 3 Not Used

1 External Power Jumper 2 DAQ Device Power Jumper

1 2