Technical Specifications

• Part Number: 51304542‑100 (51304542100)

• Alternative ID: KLCN‑I/O_CA, LCN A Interface Board, I/O Control Board

• Module Type: LCN Cable Interface Converter (LCN A)

• 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 A (twisted‑pair, RS‑485, 2 Mbps)

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

• Max Distance: 1.2 km (LCN A cable)

• Power: 5 VDC ±5%, 300 mA (from backplane)

• Power Consumption: ~1.5 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: ~0.15 kg

• Coating: Standard (non‑conformal)

• Certifications: CE, RoHS compliant

• Revisions: Common Rev F (hardware/firmware)

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

Interface & Communication Configuration

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

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

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

• Diagnostics: 2 on‑board LEDs (Power, LCN A 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)

Core Functions

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

2. Signal Isolation: Provides electrical isolation between LCN and LCN A segments, reducing noise and interference.

3. Data Transmission: Transmits LCN data at 1 Mbps to remote I/O panels via LCN A (up to 1.2 km).

4. Diagnostics & Monitoring: Monitors LCN A 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 A interface boards in existing TDC3000/TPS installations.

Compatibility Note

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

• Replacement: 51304542‑100 → Updated LCN A interface module (current part number varies by revision)

• Firmware: Requires TDC3000 firmware Rev 200+ for full LCN A functionality

• Key Difference: 51304542‑100 = LCN to LCN A converter; 51304540 series = LCN fiber extender (LCNE2)