CHAPTER 1: INSTALLATION AND TESTING
SNAP High-Density Digital Module User’s Guide
3
INSTALLING MODULES
As shown below, high-density digital (HDD) modules can be mixed with other modules and placed in any
position on a SNAP PAC rack. (For information on using HDD modules with other Opto 22 mounting racks, see
“Notes on Legacy Hardware and Software” on page 15
Follow these steps to install modules.
1.
Turn off power to the rack.
2.
Remove the module from its packaging.
3.
Position the module over the connector on the rack,
aligning the small slot at the base of the module
with the retention bar on the rack. If it is next to
another module, make sure the male and female
module keys are aligned, as shown at right.
4.
Push straight down on the module to snap it into
position.
The module snaps securely into place and requires a
special tool (provided) to remove it. To remove a
module, see below.
5.
As shown at right, use standard 4-40 x 1/4
truss-head Phillips hold-down screws to secure both
sides of each module.
CAUTION:
Do not over-tighten screws.
Recommended torque: 4 in-lb (0.45 N-m)
6.
Continue with
“Attaching the Cable” on page 7
.
SNAP high-density digital modules can be mixed on the rack with
SNAP 4-channel digital, analog, and serial modules.
