I/O Terminal Blocks are generic wiring bases that provide modulemounting, backplane communications, and terminals for userconnections. Two modules can be installed on one terminal block. Modules screw onto the terminal block for vibration resistance. Modules can be removed without disturbing field wiring.I/O Terminal Block IC670CHS101 permits hot insertion/ removalof modules without affecting the Bus Interface Unit or othermodules in the I/O Station. Hot insertion/removal can only beperformed in non–hazardous locations