Technical Specifications

• Part Number: 51304544‑100 (51304544100)

• Alternative ID: KLCN‑I/O_CB, LCN B Interface Board, I/O Control Board

• Module Type: LCN B Cable Interface Converter (KLCN‑I/O_CB)

• System Compatibility: Honeywell TDC3000 / TPS (LCN network, APM/HPM/NIM)

• Processor: On‑board 8‑bit microcontroller

• Memory: 64 KB RAM, 128 KB Flash (firmware)

• Network Interface: LCN (1 Mbps, electrical, BNC 75Ω); LCN B (twisted‑pair, RS‑485, 2 Mbps)

• Cable Type: Shielded twisted‑pair (22–24 AWG)

• Max Distance: 1.5 km (LCN B cable)

• Power: 5 VDC ±5%, 350 mA (from backplane)

• Power Consumption: ~1.75 W

• Operating Temperature: 0°C to +60°C

• Storage Temperature: -40°C to +85°C

• Humidity: 5%–95% RH, non‑condensing

• Dimensions (H×W×D): 178 × 127 × 20 mm

• Weight: ~0.16 kg

• Coating: Standard (non‑conformal)

• Certifications: CE, RoHS compliant

• Revisions: Common Rev E (hardware/firmware)

• Status: Discontinued (replaced by updated LCN B interface module)

Interface & Communication Configuration

• Host Interface: LCN electrical (BNC, 75Ω) – connects to local LCN network

• Field Interface: LCN B (RS‑485, 2‑pin terminal block) – connects to remote I/O panels

• Protocol: LCN (proprietary); LCN B (RS‑485, half‑duplex)

• Diagnostics: 2 on‑board LEDs (Power, LCN B Link); remote alarm reporting via LCN

• Hot Swap: Yes (replace without system shutdown)

• Compatibility: Works with all TDC3000/TPS LCN nodes (HPM, APM, NIM, GUS); interoperable with 51304542‑100 (LCN A)

Core Functions

1. LCN to LCN B Conversion: Translates electrical LCN signals to RS‑485‑based LCN B for long‑distance I/O connection.

2. Signal Isolation: Provides electrical isolation between LCN and LCN B segments, reducing EMI/RFI noise.

3. Data Transmission: Transmits LCN data at 1 Mbps to remote I/O panels via LCN B (up to 1.5 km).

4. Diagnostics & Monitoring: Monitors LCN B link quality, signal strength, and module health; reports faults to system HMI.

5. I/O Expansion: Enables connection of additional remote I/O panels to the LCN network, expanding system I/O capacity.

Application Scenarios

• TDC3000/TPS DCS: Connecting remote I/O panels to LCN network in large process plants.

• Large‑Scale Process Plants: Chemical, petrochemical, oil & gas, power generation (wide‑area I/O coverage).

• Harsh Environments: Industrial areas with high electrical noise, EMI/RFI interference, or long cable runs.

• Legacy System Maintenance: Replacement for aging LCN B interface boards in existing TDC3000/TPS installations.

Compatibility Note

• System Compatibility: Honeywell TDC3000/TPS (LCN network mandatory)

• Replacement: 51304544‑100 → Updated LCN B interface module (current part number varies by revision)

• Firmware: Requires TDC3000 firmware Rev 250+ for full LCN B functionality

• Key Difference: 51304542‑100 = LCN A (1.2 km, basic); 51304544‑100 = LCN B (1.5 km, enhanced noise immunity)