Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Triconex (Schneider Electric) |
| Module Type | Tricon Communication Module (TCM) |
| Ethernet Ports | 2× 10/100 Mbps copper RJ-45 (NET 1, NET 2) |
| Serial Ports | 4× RS-232/422/485, 115.2 kbps per port |
| Aggregate Serial Throughput | 460.8 kbps total |
| Supported Protocols | TriStation, Modbus RTU/TCP, TCP/IP, UDP/IP, SNTP, TSAA, Jet Direct, Trimble GPS |
| System Compatibility | Tricon v10.0 and later |
| Max TCMs per System | Up to 4 TCMs (occupying 2 logical slots); mixed models cannot share a logical slot |
| Max Modbus Nodes | 32 Modbus master/slave connections system-wide |
| Port Isolation | 500 VDC |
| Hot Standby | Not supported; hot-swap of a failed unit is supported |
| Weight | ~3.18 kg (module), ~4.5 kg (shipping) |
| Warranty | 12 months against functional defects consistent with delivered condition |
Product Introduction
If your Tricon SIS is still talking to a Foxboro DCS, a Modbus gas detector panel, or a GPS clock, the 4329 TCM is usually the card keeping that conversation alive. It sits in the Tricon rack and handles all the external comms so the main processor — typically a 3008 — doesn’t get buried under protocol overhead. That separation matters. I’ve watched a slow Modbus poll drag down scan response on systems where comms weren’t offloaded properly.The 4329 gives you two independent Ethernet paths and four serial ports, which means you can run TriStation engineering access on one network while Modbus traffic runs on the other. Serial #1 can take a Trimble GPS antenna for system-wide time sync, and serial #4 can serve as a TriStation port. That flexibility is why this card stayed in service long after newer TCM variants appeared. One caveat: the 4329 is the copper Ethernet version at 10/100 Mbps. If your plant upgraded to fiber or 100 Mbps-only TCMs like the 4352B or 4353, you cannot mix them in the same logical slot.
Quality SOP & Tech Pitfalls
The Lab Report (SOP):
- Visual and counterfeit inspection: PCB condition, edge connector, RJ-45 jacks, serial DB-9/terminal interface, nameplate integrity.
- Live test on a Tricon test rack: module recognized by chassis, LED status sequence verified, TriStation communication established.
- Ethernet link test: both NET 1 and NET 2 ports tested for link negotiation at 10/100 Mbps.
- Serial port verification: loopback or connected-device test on all four serial ports at 115.2 kbps.
- Firmware and revision logging: full part number, revision, serial, and firmware/date code photographed and recorded.
- Insulation check: port isolation verified where test equipment permits.
- Packaging: anti-static bag, shock-absorbing packing, test record included.
The Engineer’s Warning (Pitfalls):
- Logical slot conflict. The Tricon system allows up to four TCMs, but they occupy two logical slots. Mixing a 4329 with a 4352B or 4353 in the same logical slot will cause configuration errors. I’ve seen a plant spend six hours chasing a “module mismatch” alarm that was simply a mixed TCM type in one slot pair.
- Firmware and Tricon version mismatch. The 4329 requires Tricon v10.0 or later. Dropping it into an older chassis without a firmware check is a fast way to get a non-communicating module.
- Serial port assignment confusion. Serial #1 and #4 have special roles (GPS and TriStation). Swapping cable assignments without updating the TriStation configuration will break time sync or engineering access.
- Network segmentation. NET 1 and NET 2 are independent paths. If your plant uses them for separate VLANs or physical networks, verify switch port config before swapping the card. A dead link is often a switch issue, not a module issue.
Installation & Configuration Guide
1. Pre-Installation ⚠️
- Obtain work permit and notify operations. This is a SIS communication module — loss of comms to the DCS or fire panel can trigger alarms even if the safety logic is unaffected.
- Photograph the existing module: part number, revision, serial number, LED states, and all cable labels.
- Export the current TriStation configuration and note the TCM slot assignment, IP addresses, and serial port mappings.
2. Removal
- Disconnect Ethernet and serial cables. Label each one. NET 1 and NET 2 must go back to the correct ports.
- Release the module retention hardware and slide the TCM out of the chassis.
- Place the removed module in an anti-static bag.
3. Installation
- Verify the replacement part number and revision match the original. This prevents 90% of startup problems.
- Seat the module firmly in the same slot. Ensure the edge connector is fully engaged.
- Reconnect cables to the correct ports. Double-check NET 1 vs. NET 2.
4. Power-On & Testing
- Observe the LED boot sequence. The module should transition through its initialization states per the Tricon manual.
- Open TriStation and verify the TCM is recognized and healthy.
- Test Ethernet communication on both networks. Confirm Modbus polls, TriStation access, and GPS time sync (if applicable).
- Document the new module serial number and revision in the plant’s SIS records.
Compatible Replacement Models
| Model | Compatibility | Notes |
|---|---|---|
| Triconex 4329 | ✅ Drop-in | Same part number. Verify revision and firmware. |
| Triconex 4352B | ⚠️ Software compatible | Fiber Ethernet, 100 Mbps. Requires configuration review; cannot mix with 4329 in same logical slot. |
| Triconex 4353 | ⚠️ Software compatible | Copper Ethernet, 100 Mbps only. Same logical slot restriction applies. |
| Triconex 4354 | ⚠️ Software compatible | Newer TCM variant with OPC server support. Requires TriStation configuration update. |
Frequently Asked Questions (FAQ)
Can I hot-swap a failed 4329?
Yes, the Tricon system supports online replacement of a failed TCM. That said, I always coordinate with operations first. You’ll lose comms on that module’s networks until the replacement comes online.Will a 4329 work in any Tricon chassis?
It requires Tricon v10.0 or later firmware. Check your main processor version and system firmware before ordering.Can I mix a 4329 with a 4353 in the same slot pair?
No. Different TCM models cannot share the same logical slot. This is a hard configuration rule, not a recommendation.Does it support Modbus TCP and RTU simultaneously?
The system supports up to 32 Modbus master/slave connections across all TCMs, using serial (RTU) and Ethernet (TCP) ports. Exact allocation depends on your TriStation configuration.Is this module new or surplus?
Market supply is primarily new surplus and removed-from-service units. Always request nameplate photos and a pre-shipment test record.What’s the warranty?
12 months against functional defects consistent with delivered condition. Damage from incorrect wiring, lightning, moisture, or improper installation is excluded.How do I know if my 4329 is actually bad?
Check the LED indicators, verify both Ethernet links, and test serial port communication. A significant number of “failed” TCMs turn out to be switch port issues, bad serial cables, or TriStation configuration errors. Test the module on a known-good rack before condemning it.
