4351B
TCM · 2 Ethernet Ports · 4 Serial Ports · TriStation and Modbus
Lifecycle note: Triconex 4351B is a Tricon Communication Module with Ethernet and serial interfaces. Confirm firmware, network architecture, addressing, protocols and host dependencies before replacement.
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+86 18020776786Tricon Communication Module · Tricon Safety Systems
Triconex 4351B is a Communication Module engineered for use within Tricon Safety Systems. It supports installed control, safety and maintenance strategies where the exact module or termination identity must remain traceable to the approved system configuration.
Key technical identifiers for engineering review include Module category: Tricon Communication Module (TCM); Serial ports: 4 × RS-232/RS-485, DB-9; Ethernet ports: 2 × 10/100BaseT, RJ-45; Ethernet media: Copper. These values should be checked against the installed hardware, field interface, project drawings and the current site asset record before replacement. From a system-integrator perspective, compatibility assessment should cover the complete model and hardware revision, chassis or termination arrangement, connector and channel mapping, field voltage or signal requirements, firmware or system release, and the applicable TriStation configuration.
For commissioning and maintenance, follow the approved isolation, inspection and test procedure. Record point checks, diagnostics, wiring condition and observed system response so the replacement decision can be traced to the installed loop or subsystem. For MRO procurement, provide a clear nameplate photo, required quantity, destination, urgency and any revision restrictions. Commercial confirmation should distinguish new, surplus and refurbished condition and should reference the offered serial or nameplate identity.
| Manufacturer | Triconex / Schneider Electric |
|---|---|
| Model | 4351B |
| Module category | Tricon Communication Module (TCM) |
| Serial ports | 4 × RS-232/RS-485, DB-9 |
| Ethernet ports | 2 × 10/100BaseT, RJ-45 |
| Ethernet media | Copper |
| Port isolation | 500 VDC |
| Supported protocols | TriStation, Modbus, TCP/IP, ICMP, SNTP, TSAA |
| Additional services | Peer-to-Peer UDP/IP, time synchronization, Jet Direct |
| Copper Ethernet speed | 10/100 Mbps |
| Serial-port rate | Up to 115.2 Kbps per port |
| Modbus functions | 01, 02, 03, 04, 05, 06, 07, 08, 15, 16 |
| Module indications | PASS, FAULT, ACTIVE, FIRM |
| Port indications | LINK, TX, RX per network port |
| Maximum TCM population | 4 per Tricon system |
| Logical-slot rule | TCMs occupy two logical slots |
| Mixing rule | Different TCM models cannot share one logical slot |
| Modbus capacity | Up to 32 Modbus masters/slaves per Tricon system |
| Hot-spare capability | Supported for online controller replacement |
Tricon is a legacy Triconex automation platform. Confirm the complete installed configuration before replacement or migration.
Record NET1 and NET2 IP settings, switch connections, all four serial-port modes and addresses, cable destinations, protocol roles, aliases and time-synchronization dependencies.
A TCM occupies two logical slots, a Tricon system supports up to four TCMs, and different TCM models cannot be mixed in one logical slot. The complete chassis map must be checked before ordering.
Document which Ethernet or serial port carries each service, then preserve addressing, polling, aliases, host permissions and timeouts. Do not assume the replacement will reconstruct these roles automatically.
Record installed firmware, Tricon release and network exposure, then review applicable Schneider Electric guidance including SEVD-2021-130-03 for affected Tricon v11.3.x systems.
Capture RS-232 or RS-485 mode, baud rate up to 115.2 Kbps, master/slave role, device address, parity, stop bits, cable pinout and isolation requirements for each DB-9 port.
Verify PASS/FAULT/ACTIVE/FIRM state, Ethernet LINK/TX/RX on both RJ-45 ports, representative serial communication, port isolation, connector condition and nameplate traceability using a controlled test system.
Confirm exact TCM model, logical-slot pairing, firmware, controller health, saved network and serial configuration, and the approved online-replacement procedure before removing the active module.
Provide quantity, condition, revision, Tricon release, logical slot, copper Ethernet requirement, serial-port roles, firmware constraint, destination and clear module-label photographs.
Test both Ethernet paths, each assigned serial port, Modbus transactions, TriStation access, peer-to-peer services, SNTP/time behavior, alarms and host reconnection, then document cybersecurity and functional approval.
Send the model, complete part number, quantity, destination and nameplate photo. We will verify identification details before confirming availability and lead time.
Official PDF extract: Official Triconex Product Specifications — Model 4351B. File size is below 1 MB; verify the exact installed hardware and configuration before use.
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