INSTALLING HARDWARE
SNAP PAC R-Series Controller User’s Guide
8
Modules snap into position in the row of connectors on the SNAP PAC rack. Each module connector has a
number.
NOTE: R-series controllers with serial numbers lower than 600,000, and all SNAP-PAC-R1-B controllers, are limited to
eight 4-channel digital modules per rack, located in the first eight positions.
1.
Place the rack so that the module connector numbers are right-side up, with zero on the left.
2.
Position the module over the module connector, aligning the small slot at the base of the module with
the retention bar on the rack.
3.
With the module correctly aligned over
the connector, push on the module to
snap it into place.
When positioning modules next to each
other, be sure to align the male and
female module keys (shown in the
detailed view in the illustration at right)
before snapping a module into position.
Modules snap securely into place and
require a special tool (provided) to
remove them. To remove a module, see
the next section.
4.
(Optional) Use standard 4-40 x 1/4
truss-head Phillips hold-down screws to
secure both sides of each module.
Do not
over-tighten screws.
5.
Plug the wiring connector into each
module to attach modules to the devices
they monitor.
See the wiring diagrams in the module’s data sheet.
6.
Continue with
“Installing the Controller” on page 9
.
Controller
connector
Module
position zero
Retention bar
Module connectors
SNAP PAC racks are shown in all illustrations.
Optional hold-
down screws
Module keys
