Access control applications 
EST3 Installation and Service Manual  3.47 
Two-person rule 
Description of the application 
A two-person rule ensures that no staff member can be in a 
controlled area alone. A CRC operating under two-person rule 
prevents the entrance of a single person into the controlled area. 
When two people are present in the area, one cannot exit without 
the other. 
The controlled area can have a single entrance or multiple 
entrances. The network coordinates user information between the 
CRCs that serve a common area.
 
A typical two-person rule application is shown in Figure 3-19, 
below.