Specifications

PLC-5 Controller Choices 19
1785-SO036C-EN-P - April 2002
Protected PLC-5 controllers The protected PLC-5 controller lets you limit access to critical or
proprietary areas of programs, selectively guard controller memory
and I/O, or restrict use of controller operations. The distinctive
safety-yellow labels on the controller identify the protected
PLC-5 controller.
Use the programming software to assign class privileges to specific
user accounts or a user’s job function, such as system administrator,
plant engineer, maintenance engineer, or operator. Using four
privilege classes and associated passwords, you can limit access to
critical areas of programs and restrict access to:
• communication channels
• remote nodes attached to the ControlNet or DH+ network
• program files
• data files
The protected PLC-5 controller expands system validity and security
beyond that provided by the password-and-privilege feature of the
other PLC-5 controllers. The Rockwell Automation clutch/brake
application package combines the protected PLC-5 controller with
specially-designed software to support stamping press applications.
Protected PLC-5 controllers
Features
• selectively prevent access to data
• guard individual data elements
• protect specific elements within the
processor status file
• reduce the risk of unauthorized
program modifications
• plus the features of the Enhanced
PLC-5 controllers
Controller
Maximum
User
Memory
(words)
Total I/O Maximum Channels
PLC-5/26
(1785-L26B)
16K 512 any mix or
512 in + 512 out (complement)
1 DH+
1 DH+/remote I/O
PLC-5/46
(1785-L46B)
48K 2048 any mix or
2048 in + 2048 out (complement)
4 DH+/remote I/O
PLC-5/46C
(1785-L46C15)
48K 2048 any mix or
2048 in + 2048 out (complement)
1 ControlNet
2 DH+/remote I/O
PLC-5/86
(1785-L86B)
100K 3072 any mix or
3072 in + 3072 out (complement)
4 DH+/remote I/O
Controller Choices