8030-HRK-150. The Symax Class 8030 Type HRK-150 Register/Digital Rack Assembly provides the mounting slots for the Type HIM and HOM 8 function digital I/O modules and register modules. Additional features of the rack assembly include: a power supply connector, on the top of the rack, provides power for the I/O and register modules and the model 300, 400, 600, or 650 processor. A ground terminal, on the left mounting bracket, ties the rack assembly to ground. A latching clamp, directly above the mounting slots, secures the modules in the slots. Nylon wire routing clips, on the bottom of the racks, route the input and output field wires to the proper I/O modules. A dead front cover is also provided to cover the I/O wiring.