Description
The Triconex 4351B is a high-availability Tricon Communication Module (TCM) designed for Schneider Electric’s Tricon v10.0 and later Safety Instrumented Systems (SIS). Serving as the primary communication bridge, it enables Triple Modular Redundancy (TMR) controller complexes to interface safely and seamlessly with external host platforms, distributed control systems (DCS), and supervisory networks over both Ethernet and serial architectures.
- Manufacturer: Invensys Triconex / Schneider Electric
- Product Line: Tricon Series Safety Instrumented System (SIS)
- Model Number: TRICONEX 4351B
- Product Type: Tricon Communication Module (TCM)
- System Compatibility: Compatible strictly with Tricon v10.0 and subsequent system architectures
- Network Ports: 2 Copper Ethernet 10/100 Mbps ports (RJ-45 connectors designated as NET 1 and NET 2)
- Serial Ports: 4 RS-232/RS-485 ports via DB-9 connectors (Up to 115.2 Kbps per port)
- Port Isolation: 500 VDC galvanic isolation protection
- Network Protocols: TriStation, Modbus Master/Slave, Modbus TCP, TCP/IP, ICMP, SNTP, TSAA (with IP Multicast support), Peer-to-Peer (UDP/IP), and JetDirect network printing
- Maximum Modules Per System: Up to 4 TCMs per single Tricon system (arranged across two logical slots)
- Wetting Voltage Input: Nominal 24 VDC
- Operating Temperature Range: -40°C to 70°C (-40°F to 158°F)
- Storage Temperature Range: -40°C to 85°C (-40°F to 185°F)
- Relative Humidity: 5% to 95% non-condensing
- Dimensions: Standard Tricon slot-mount design, approximately 6.3 x 6.3 x 4.72 inches (16.0 x 16.0 x 12.0 cm)
- Weight: 7.01 lbs (3.18 kg)
- Country of Origin: United States (USA)
Target Applications
The TCM 4351B is implemented within high-integrity industrial safety loops certified up to SIL 3 parameters where communication failure cannot be tolerated. Main target application sectors include:
- Emergency Shutdown (ESD) systems within upstream and downstream oil and gas lines
- Critical Fire and Gas (F&G) protection monitoring networks
- Burner Management Systems (BMS) for industrial boilers and processing furnaces
- High-Integrity Pressure Protection Systems (HIPPS) in petrochemical refineries
- High-speed turbomachinery and large-scale gas/steam turbine control sequencing
TRICONEX 4351B
TRICONEX 4351B
TRICONEX 4351B
Operating Instructions and Safety Guidelines
- Always verify that an Electrostatic Discharge (ESD) grounding wrist strap is correctly secured to your arm and the panel frame before unpacking or handling the module circuit board.
- Ensure the main processor chassis framework matches Tricon v10.0 or higher firmware baselines, as inserting this card into legacy v9 architectures will result in a boot configuration fault.
- Utilize high-quality Category 5e or Category 6 shielded twisted-pair (STP) copper cabling for NET 1 and NET 2 connections to keep the safety network free from industrial electromagnetic noise.
- While the 4351B module supports hot-swapping (online replacement of a defective unit without interrupting system uptime), ensure that different TCM hardware models are never mixed within the same logical backplane slot.
Frequently Asked Questions
- Q: How does the system resolve variables between Tricon logic and external Modbus systems?
A: Tricon programs utilize specific variable names as identifiers, whereas standard Modbus networks read numeric addresses. Technicians must assign a five-digit numerical alias to each Tricon variable inside the TriStation 1131 software configuration tool before the data can be exchanged.
- Q: Which protocols are isolated to specific ports on the 4351B interface?
A: Network port NET 1 acts as the exclusive path for critical Peer-to-Peer and Peer-to-Peer Time Synchronization data. For serial applications, Serial Port #1 supports Modbus or Trimble GPS, while Serial Port #4 is dedicated to Modbus or direct TriStation connectivity.
- Q: What do the built-in front panel status indicators signal during active runtime?
A: The faceplate features dedicated LEDs including PASS (module healthy), FAULT (hardware issue detected), ACTIVE (transmitting network data), and FIRM (firmware status), along with distinct LINK, TX, and RX indicators for individual network and serial connections.
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