Technical Specifications

• Mounting Standard: 35 mm DIN rail vertical rack mounting
• Input Power Supply: 24 VDC ±10%, maximum operating current 280 mA
• Encoder Input Channels: 2 differential line driver encoder input ports (R2 suffix definition)
• Encoder Signal Support: 5 V differential A/B/Z incremental encoder signals, maximum input frequency 10 MHz
• Digital Output Channel: 1 mechanical relay output channel (D1 suffix definition)
• Relay Output Rating: 250 VAC / 3 A resistive load maximum switching capacity
• Digital Auxiliary Inputs: 8 optically isolated 24 VDC digital sensor input terminals
• Internal Communication Bus: EtherCAT slave station communication interface, cycle time minimum 125 μs
• Control Logic Memory: 128 KB non-volatile flash memory for local logic program storage
• Physical Dimension: 90 mm (W) × 110 mm (H) × 45 mm (D)
• Net Weight: 240 g
• Protection Rating: IP20 (cabinet internal installation only)
• Operating Ambient Temperature: 0 °C to +55 °C
• Storage Temperature Range: -40 °C to +85 °C
• Certifications: UL 61131-2, CE, RoHS 2

Functional Features

1. Distributed EtherCAT slave terminal unit collects field sensor and encoder signals, transmits real-time data to main motion controller via industrial bus
2. Two-channel differential encoder signal conditioning circuit filters industrial electromagnetic noise before forwarding position signal to servo drives
3. Single-channel mechanical relay output provides high-capacity switching for external solenoid valves, alarm indicator lights, and auxiliary machine actuators
4. Eight-channel optical isolated digital input terminal detects proximity switches, limit sensors, emergency stop contact signals
5. Local standalone logic processing capability via embedded IEC 61131-3 BASIC motion program without continuous bus communication
6. Overvoltage, reverse polarity, short-circuit protection for all input/output signal terminals
7. Front panel LED status indicators for power supply, EtherCAT communication, encoder signal activity, relay output state, and fault alarm

Performance Highlights

1. 10 MHz maximum encoder input frequency supports high-speed servo motor position feedback signal collection without signal loss
2. Optical isolation voltage 2500 VAC between field signal circuit and internal control circuit eliminates ground loop interference
3. EtherCAT bus synchronization precision ≤ 1 μs across multi-terminal distributed control system
4. Mechanical relay contact service life 10 million switching cycles under rated resistive load

Material Composition

• Chassis Housing: Black ABS flame-retardant engineering plastic DIN rail enclosure
• Main PCB Substrate: FR4 double-sided flame-retardant printed circuit board
• Isolation Components: Phototransistor optical coupler 2500 V isolation grade
• Relay Module: Silver alloy contact mechanical signal relay
• Terminal Blocks: Copper alloy gold-plated screw clamp wiring terminals

Structural Characteristics

1. Standard 35 mm DIN rail snap-on mounting base with anti-drop locking buckle
2. Front panel separated wiring terminal zones: power supply terminals, digital input terminals, encoder input terminals, relay output terminals
3. Top edge integrated EtherCAT RJ45 dual-port daisy-chain communication interface for multi-terminal serial bus connection
4. Internal independent compartment separation for high-voltage relay circuit and low-voltage signal circuit
5. Front panel labeled terminal numbering and signal function marking for rapid field wiring identification

Working Principle

1. 24 VDC auxiliary power supply energizes internal DSP control chip, optical isolation input circuit, and EtherCAT communication transceiver
2. Field limit switches, proximity sensors connect to 8-channel optical isolated digital input terminals; controller converts switch signal into digital logic value for bus transmission
3. Servo motor incremental encoder differential signal enters two dedicated conditioning channels; internal filter circuit suppresses high-frequency electromagnetic noise before digitizing position pulse data
4. Embedded local logic program processes input signal data; triggers mechanical relay output to drive external auxiliary equipment upon preset logic condition satisfaction
5. All collected digital signal and position data packaged into EtherCAT real-time data frame, synchronized transmitted to upper main motion controller via RJ45 bus port

Advantage Highlights

1. Distributed terminal architecture reduces main controller I/O module quantity and electrical cabinet wiring complexity
2. Daisy-chain dual EtherCAT ports eliminate additional Ethernet switch hardware for multi-terminal system layout
3. Integrated encoder signal conditioning circuit eliminates external signal filter module procurement
4. Local standalone logic function maintains basic machine safety interlock operation during upper controller communication failure

Applicable Industries

Installation Requirements

1. Install inside sealed electrical control cabinet only; IP20 housing prohibits external dust splash exposure
2. Maintain minimum 15 mm horizontal clearance between adjacent MTC series terminal units for natural convection heat dissipation
3. All field sensor and encoder wiring must use shielded twisted pair cable with single-point cabinet grounding
4. Relay output external load wiring must add freewheeling diode for inductive loads (solenoid valves, contactors)
5. DIN rail mounting surface must be conductive metal cabinet rail connected to equipment protective earth busbar

Operation & Maintenance Precautions

1. Disconnect 24 VDC power supply before modifying terminal wiring to avoid input circuit overcurrent damage
2. Inductive load connected to relay output must not exceed rated switching capacity; overload causes rapid relay contact ablation
3. Ambient relative humidity must remain non-condensing; condensation causes PCB surface leakage current and signal failure
4. Inspect RJ45 EtherCAT port contact pins every 6 months for oxidation in high-humidity workshop environments
5. Local logic program firmware upgrade only via official Kollmorgen WorkBench software tool