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- Key Technical Specifications
| Parameter | Specification |
| Part Number | TK-FTEB01 (PCB: 51309512-175 / 51309512-275) |
| Conformal Coating | Yes (“TK” prefix indicates factory conformal coating for harsh environments) |
| System Compatibility | Honeywell Experion PKS (C300 Controller / C200 Execution Environments) |
| Network Physical Layer | Dual 10/100 Mbps RJ45 Ethernet ports (FTE Network A & FTE Network B) |
| Redundancy Support | Fully redundant FTE dual-tree topology with sub-second failover |
| Backplane Power Input | 24 VDC / 5 VDC via Series C I/O slot backplane assembly |
| Mounting Format | Series C vertical I/O slot / C300 controller chassis |
| Operating Temperature | -40°C to +70°C (-40°F to 158°F) |
| Weight | ~0.85 lbs (0.38 kg) |
- Product Introduction
The Honeywell TK-FTEB01 (51309512-175) is a conformal-coated Fault Tolerant Ethernet (FTE) bridge module engineered for Honeywell Experion PKS C300 control systems. Functioning as the high-speed communications gateway, the TK-FTEB01 links process controllers, I/O modules, and field devices to the upper-level FTE supervisor network across redundant physical paths.
Featuring two independent RJ45 Ethernet interfaces (Port A and Port B), the TK-FTEB01 eliminates single points of failure by automatically routing process traffic around broken cables, failed switches, or port faults without interrupting controller execution or DCS display updates. The “TK-” designation guarantees conformal coating protection against corrosive airborne contaminants in severe chemical, refinery, and offshore environments.
TK-FTEB01
- Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
| FTE Port A or B Link LED dark | Loose RJ45 Ethernet patch cable, unpowered switch, or bad Ethernet port | ✅ High | Check front panel FTE Link/Activity LEDs; inspect switch port status | Re-seat Ethernet cables. Swap patch cable or test switch port. Ensure both FTE Tree A and Tree B switches are powered. |
| Redundancy degraded alarm in Experion station | Loss of communication on one FTE channel or IP address configuration drift | ✅ High | Run FTE Diagnostic Utility on Experion server; check dual IP ping response | Verify both Network A and Network B IP subnets are online. Re-seat or replace TK-FTEB01 if internal port transceiver fails. |
| Module status “OK” LED is OFF or flashing RED | Hardware self-test failure or backplane power supply drop | ✅ High | Inspect power distribution module and check module diagnostic code in Configuration Studio | Cycle module power. If fault persists after re-seating in C300 IOB, replace TK-FTEB01 module. |
| Intermittent network disconnects under heavy load | Duplex/speed mismatch on managed Ethernet switch port | ✅ High | Check switch port auto-negotiation logs and CRC error counts | Lock switch ports connected to TK- to 100 Mbps / Full Duplex if auto-negotiation drops frames. |
- Frequently Asked Questions (FAQ)
Q: What is the difference between the TK- and the TC-? A: The “TK” prefix signifies that the circuit board assembly is conformal coated for protection against G3 harsh environments (hydrogen sulfide, moisture, chemical vapors), whereas the “TC” version is un-coated for standard environment use.
Q: Can the TK- be hot-swapped while the C300 controller is online? A: Yes. In a redundant C300/FTE configuration, the TK- module can be hot-swapped online without shutting down the controller or interrupting plant process operations.
Q: What network protocol does the TK- module use? A: It utilizes Honeywell’s proprietary Fault Tolerant Ethernet (FTE) protocol layered over standard UDP/IP Ethernet, providing rapid self-healing network redundancy across commercial off-the-shelf switches.
Q: Does the TK- require external DC power wiring? A: No. The card receives operating power directly through the Series C backplane I/O channel assembly (IOB).
Q: How are surplus or refurbished Honeywell TK- modules verified prior to shipment? A: Each unit undergoes a 5-step SOP quality inspection: backplane edge pins and conformal coating integrity are inspected, the card is inserted into an active Experion test rack, FTE network A/B redundant communication failover is tested under live data load, a multi-hour thermal burn-in run is performed, and anti-static ESD packaging is applied before dispatch.
