The Moxa TCC-120 and TCC-120I are industrial-grade RS-422/485 converters/repeaters that extend serial transmission distances and improve signal integrity. Designed for critical applications, these devices feature a rugged metal enclosure, wall and DIN-rail mounting options, and an external terminal block power input. The TCC-120I model adds 2 kV optical isolation for enhanced system protection.

They support 2-wire and 4-wire RS-485 as well as RS-422 and offer automatic data direction control (ADDC), making them ideal for transparent communication bridging. DIP-switch-configurable termination adds flexibility for stable long-distance transmissions.

Technical Specifications:

Serial Interface:

• Standards: RS-422 / RS-485
• Number of Ports: 2
• Connector: Terminal block
• Baudrate: 50 bps to 921.6 kbps (non-standard rates supported)
• Direction Control: ADDC (automatic)
• Signals:
• RS-422: Tx+, Tx-, Rx+, Rx-, GND
• RS-485-4w: Tx+, Tx-, Rx+, Rx-, GND
• RS-485-2w: Data+, Data-, GND

Resistors & Termination:

• Pull High/Low: 1 kΩ, 150 kΩ
• Termination: 120 Ω, 120 kΩ, or none (via DIP switch)

Isolation (TCC-120I only):

• Optical: 2 kV

Power Parameters:

• Input Voltage: 12 to 48 VDC
• Current Consumption:
• TCC-120: 65 mA @ 12 VDC
• TCC-120I: 180 mA @ 12 VDC
• Connector: Terminal block
• Protection: Overcurrent protection included

Physical Characteristics:

• Housing: Metal, IP30 rated
• Dimensions: 67 × 100.4 × 22 mm
• Weight: 148 g
• Mounting: DIN-rail (with kit) or wall mount

Environmental Limits:

• Operating Temperature: -20 to 60 °C
• Storage Temperature: -40 to 85 °C
• Humidity: 5 to 95% RH (non-condensing)

Certifications and Standards:

• EMC: CISPR 32, FCC Part 15B Class A
• EMS: IEC 61000-4-2 to 4-8
• Safety: UL 60950-1
• Environment: RoHS, WEEE
• MTBF: 1,949,025 hours (Telcordia standard)

Package Contents:

• 1x TCC-120 or TCC-120I device
• 1x Terminal block-to-power jack converter
• 1x DIN-rail kit
• 1x Rubber stand
• 1x Quick installation guide
• 1x Warranty card