Mounting the NI-9157/9159

You can mount the chassis horizontally on a 35 mm DIN rail or on a flat, vertical, metallic surface such as a panel or wall. The maximum allowable ambient temperature for operation is 55 °C. Mounting the chassis in a different orientation or on a nonmetallic surface can reduce the maximum allowable ambient temperature and can affect the typical accuracy of modules in the chassis. The following figure shows the chassis mounted horizontally.

Figure 4. NI-9157/9159 Mounted Horizontally

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Measure the ambient temperature at each side of the chassis, 63.5 mm (2.5 in.) from the side and 50.8 mm (2 in.) forward from the rear of the chassis.

Notice Your installation must meet the following requirements for space and cabling clearance:
  • Allow 50.8 mm (2 in.) on the top and the bottom of the chassis for air circulation.
  • Allow 50.8 mm (2 in.) in front of modules for cabling clearance for common connectors, such as the 10-terminal, detachable screw terminal connector.
Figure 5. NI-9157/9159, Bottom View with Dimensions

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  1. Measure ambient temperature here.
Figure 6. NI-9157/9159, Front View with Dimensions

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Figure 7. NI-9157/9159, Side View with Dimensions

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The following sections contain instructions for the mounting methods. Before using any of these mounting methods, record the serial number from the back of the chassis. You will be unable to read the serial number after you have mounted the chassis.

Caution Make sure that no I/O modules are in the chassis before mounting it.