Description
Product Description
- Triconex 8111 Expansion Chassis adds more I/O slots to your Tricon system.
- It uses high density configuration for maximum I/O per space.
- The chassis connects via triplicated RS-485 I/O expansion bus.
- Works as Expansion or RXM chassis for primary RXM modules.
Technical Specifications
- Model Number: 8111
- Brand: Triconex / Tricon
- Product Type: Expansion Chassis, High Density Configuration
- Overall Dimensions: 19 x 22.75 x 17.75 inches (48.3 x 57.8 x 45.1 cm)
- Chassis Fabrication: Black zinc-plated, welded cold-rolled steel
- I/O Expansion Ports: 6 x RS-485 at top left corner of backplane
- Communication Channels: Two sets for channels A, B, C (triplicated)
- Bus Speed (I/O to Main Processor): 375 kilobits per second
- Bus Speed (Processor to Comm Module): 2 megabits per second
- Standard Cable Set: Model 9000, 6 feet (longer available)
Weight Specifications (by Component)
- Main or Expansion Chassis: 54.0 lbs (24.5 kg)
- Power Module: 7.2 lbs (3.3 kg)
- Main Processor: 4.7 lbs (2.1 kg)
- I/O Module: 4.7 to 6.0 lbs (2.1 to 2.7 kg)
- Communication Module: 5.0 lbs (2.3 kg)
- 16-point Termination Panel: 0.09 lbs (0.04 kg)
- 32-point Termination Panel: 2.1 lbs (0.95 kg)
Key Features (Hierarchical View)
- I/O Expansion Bus Design
- Six RS-485 ports on backplane top left corner
- Two sets of ports for channels A, B, and C
- Triplicated serial communication paths between chassis
- Communication Speeds
- Between I/O modules and main processors: 375 Kbps
- Between main processors and comm modules: 2 Mbps
- Cable Requirements
- One cable set per expansion chassis
- One cable set for RXM chassis (primary RXM module set)
- Standard cable: Model 9000, 6 feet length
- Longer cables available on request
- Chassis Construction
- Black zinc-plated finish
- Welded cold-rolled steel
- Durable for industrial environments
Keyswitch Operating Modes (Related Functionality)
- RUN
- Executes loaded control program
- TriStation, Modbus, and external hosts cannot modify variables
- Gated access functions allow writes during a time window
- PROGRAM
- For program loading and testing
- Allows Download All and Download Change from TriStation
- Allows external host writes to program variables
- STOP
- Stops reading inputs
- Forces non-retentive outputs to 0
- Halts the control program
- Retentive outputs keep previous values
- Use for process equipment service
- REMOTE
- Allows TriStation and external hosts to write variables
- Download All and Download Change not allowed
- Cannot modify program logic
Installation Guide
- Mount chassis in standard 19-inch rack or cabinet.
- Connect I/O expansion bus using RS-485 ports.
- Use one cable set (model 9000 or longer) per expansion chassis.
- Connect RXM chassis the same way as expansion chassis.
- Set keyswitch to STOP for equipment service.
Debugging & Maintenance
- STOP mode is useful for process equipment service.
- Tricon service does not require STOP mode.
- Triplicated bus paths provide redundancy.
- One failed path does not stop communication.
- Use TriStation to check chassis communication status.
Compatibility
- Works with Tricon Main Chassis (all models).
- Accepts Tricon I/O modules, power modules, and communication modules.
- Compatible with RXM chassis for primary RXM modules.
- Integrates with Modicon Quantum via Modbus connections from the main chassis.
Package List
- 1 x Triconex 8111 Expansion Chassis (High Density)
- No cables included – order model 9000 or custom length separately
- No power supply or I/O modules included
Warranty & Shipping
- 12 months warranty against manufacturing defects.
- Shipping carriers: FedEx, UPS, DHL.
- Tracking number provided within 24 hours.
Typical Applications
- Expanding I/O capacity of existing Tricon systems
- High density I/O configurations for large safety systems
- Remote I/O for distributed process areas
- RXM chassis setups for primary module redundancy
Diagnostic Capabilities
- Triplicated bus paths allow fault detection per channel.
- Six RS-485 ports provide status visibility.
- Keyswitch position indicates operating mode.
- TriStation software shows bus health and chassis status.
FAQ – Professional Questions & Buying Guide
- How many expansion chassis can I connect to one main chassis?
Limited by bus loading and cable lengths. Check your system configuration guide for exact numbers. - Do I need special cables for the 8111 chassis?
Use model 9000 cable set (6 feet standard) or order longer cables for distant placement. - What is the difference between RUN and REMOTE modes?
RUN blocks all external writes except gated access. REMOTE allows writes from TriStation and external hosts but no program downloads. - Can I replace modules while the system is in STOP mode?
Yes. STOP mode is for process equipment service. Tricon service does not require STOP mode. - Why does my chassis show communication faults on one channel?
The system has three channels (A, B, C). One fault does not stop operation. Check cables and connections on that channel.
Experience-Based Buying Guide
- Choose Triconex 8111 when you need more I/O slots than a standard main chassis offers.
- Select high density configuration for maximum I/O points per square inch of panel space.
- Buy this chassis for RXM setups – it works as the primary chassis for RXM modules.
- Avoid this chassis if your main chassis already has enough free slots for all I/O modules.
- Order longer cables if your expansion chassis sits far from the main chassis – standard 6 feet is often too short.
- For systems requiring Modbus to outside hosts, ensure your main chassis has a communication module installed.
- Keep spare cable sets on hand for quick channel replacement without system downtime.
Contact & Inquiries
- Need help sizing your Triconex 8111 expansion system?
- Call or message us on WhatsApp: +86 158 8020 0923
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