I/O point references for modules in an RX7i rack are configured using the CIMPLICITY® Machine Edition Logic Developer-PLC software. For information on configuration, see the software online help and the CIMPLICITY Machine Edition Logic Developer-PLC Getting Started manual, GFK-1918.
The power supply, CPU, and all RX7i modules have metal faceplates that are screwed directly to the enclosure at the top and bottom to ensure the faceplate is grounded to frame ground.
Some Series 90-70 I/O modules have a ground clip that contacts the conductive bottom rail when the module is fully inserted. Shield connections in the user connectors are routed to this ground clip through conductors on the module.
The #8-32 ground studs on the sides of the rack must be connected to earth ground with not less than an AWG #12 (3.33 mm2 ) wire. Use of a nut and star washer for each wire on the GND stud is recommended to ensure adequate grounding. Refer to applicable electrical safety codes.
RX7i modules with faceplates fitted with an EMI gasket (a metal strip along the side of the faceplate) ensure contact of the gasket with the faceplate of each adjacent module in the rack, forming a continuous EMI shield for the modules in the rack. (RX7i power supplies have the gasket on both sides of the faceplate.) This EMI shield makes the rack less susceptible to external electrical noise and minimizes the level of electrical noise radiated by the rack. If the rack is not fully populated with gasketed faceplates, it must be installed into a metal enclosure to achieve similar noise improvement. Note that gasketed filler faceplates may be ordered as needed. (IC698ACC735 – single-width; IC698ACC720 -double-width)
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