Sierra Detention Systems provides security products and services for high-security correctional facilities, including detention doors, furniture, cells, locks, fencing, and security electronics systems. The company uses InduSoft SCADA software to develop access control HMIs for detention facilities, applying physical and software security measures. The HMI projects employ a class-based door control architecture with a database, PLC communication, scripting, and status graphics.

2. [ Company
[
Products Security electronics |
Founded in detention equipment | custom Market High-security and Territory Nationwide and UL panel shop, clean
1995 in Colorado metal products | building correctional facilities international coverage manufacturer
automation | fire alarm

3. [Expertise: Detention Equipment
[
Sierra furnishes and installs:
 Detention hollow metal doors and frames
 Detention furniture
 Pre-fabricated cells
 Specialty locks
 Wire mesh and grating
 Glass and glazing
 Perimeter security fencing

4. [Expertise: Security Electronics
[
Sierra furnishes, integrates, and installs the following
systems:
 Touch screen control systems
 Tablet & PDA systems
 Utilities control/ Building Automation System (BAS)
 Controlled access
 Multi-tasking CCTV
 Fire alarm/detection
 Video visitation
 IP addressable equipment
 Digital and analog equipment
 Industrial networking
 Remote access secure LAN
 Man-down, duress systems
 Intercoms
 Facility specific, requested systems

5. INDUSOFT
WEBINAR
Access Control
By Sierra Detention Systems
Paul Miracle, Controls
Engineering

6. DETENTION INDUSTRY
CONSIDERATIONS
 Physical Security
 General Public
 Facility Staff
 Inmates
 System Stability / Redundancy / Failover Required
 Each HMI capable of standalone operation
 Prioritized sequence of failover
 System activity mainly user driven, not automated/process driven
 Emphasis on “human” part of HMI

7. HMI COMPUTER SECURITY
 Physical
 InduSoft Hardkeys are secured to the HMI to prevent removal
 HMIs secured in locked cabinets
 Keyboard / mouse removed on touchscreen based systems
 Auto-Run features of the Operating System disabled

8. HMI COMPUTER SECURITY
 InduSoft
 Project runs automatically on HMI startup
 Security System used to prevent access to the Operating System
 Close Project disabled
 Task Switch (Alt-Tab) disabled
 Task Manager disabled
 Security System used to prevent Engineering Access by application users
 Auto-Logoff enabled for all groups with Engineering Access

9. USER GROUP CONFIGURATION

10. HMI COMPUTER SECURITY
 Application
 InduSoft startup screen prevents access to the system without a valid logon
 Once logged in, navigation is restricted based on HMI station and user
 Device icon commands are disabled by default and must be enabled by the
PLC in order for them to operate
 Some devices have additional security restrictions (interlocks, exterior
doors, etc.)
 Some functions have additional restrictions (Group Release, Emergency
Release, etc.)
 HMIs can be remotely disabled in the event of a security breach

11. SYMBOL LEVEL SECURITY
 Position Properties
 Command Disable Field
 User / Group Level Checks

12. DOOR CONTROL ARCHITECTURE
 Class based
 All doors have identical capabilities
 Individual door functionality based on the parameters assigned to the class
members
 Provides flexibility to modify functionality without modifying code

13. DOOR CONTROL ARCHITECTURE
 Database back end
 Used for loading / storing device parameters
 Provides flexibility (device names, etc.)
 Retentive tags allow offline operation

14. DOOR CONTROL ARCHITECTURE
 Communication
 PLC Communication accomplished primarily Standard Driver Sheets
 Allows enabling/disabling of individual sheets to optimize efficiency
 Scripting
 Extensive use of global procedures to centralize code
 Extensive use of VBScript within global procedures to enhance built-in
functionality
 Graphics
 Symbols created for all devices to make modifications easy
 Symbols primarily indicate device status only and contain minimal logic