Rack or Chassis
A chassis is the physical frame or structure of an automobile, an airplane, a desktop computer, or other multi-component device.
A Rack is the framework, typically with rails, bars, hooks, or pegs, for holding or storing things.
6ES5710-0SA11 - Siemens
SIMATIC S5, MOUNTING RACK FOR PC S5-110 FOR 8 Input/Output ModuleS..
6ES7407-0DA01-0AA0 - Siemens
Simatic S7-400 PS 407 Power Supply Module 4A, 120/230V AC, 5V/4A DC..
6ES7407-0DA02-0AA0 - Siemens
Simatic S7-400 PS407 Wide Range Power Supply Module 4A 120/230V AC, 5V/4A DC..
6ES7401-2TA00-0AA0 - Siemens
SIMATIC S7-400, CR2 RACK, CENTRALIZED,18 SLOTS,2 SEGMENTS..
6ES7403-1JA00-0AA0 - Siemens
SIMATIC S7-400, ER2 EXP. RACK, with 9 SLOTS, F. SIGNAL ModuleS onLY..
CS1D-BC082S - Omron
Simplex CPU backplane, 8 I/O slots, use CS1D-PA/PD power supplies only..