Metso D200536

Technical Specifications

• Number of Relay Output Channels: 8 independent relay contact channels
• Relay Contact Rating: 250 VAC / 5 A resistive load, 30 VDC / 5 A resistive load
• Contact Type: Single-pole single-throw (SPST) normally open mechanical relay contacts
• Backplane Operating Supply: 24 VDC nominal (10–30 VDC operating range)
• Module Maximum Consumption Current: 220 mA
• Operating Temperature Range: -10 °C ~ +60 °C
• Storage Temperature Range: -40 °C ~ +85 °C
• Humidity Tolerance: 5% – 95% relative humidity, non-condensing
• Vibration Resistance: 1.2 g (10–150 Hz per IEC 60068-2-6)
• Relay Mechanical Service Life: 10,000,000 switching cycles
• Relay Electrical Service Life: 100,000 switching cycles at full rated load
• Output Switch Response Time: ≤ 15 ms actuation delay
• Dimensions (W×H×D): 100 mm × 70 mm × 30 mm
• Net Weight: 0.52 kg
• Certifications: CE, UL 508, IECEx general industrial certification

Functional Features

1. 8 independent mechanical relay output channels with isolated coil and contact circuits
2. Front panel individual channel LED status indicators reflecting relay coil energization state
3. Built-in contact surge absorption varistors for inductive load (solenoid coil) back-EMF suppression
4. Software-configurable output pulse delay and latching mode via DCS host controller
5. Overload current detection circuit for each output channel with fault reporting to DCS
6. High-speed D20 backplane parallel communication bus for real-time output command reception
7. Hot-swappable rack mounting design for online module replacement

Performance Parameters

• Relay contact isolation voltage: 2000 Vrms coil-to-contact isolation
• Minimum contact insulation resistance: 1000 MΩ at 500 VDC test voltage
• Maximum inductive load switching capacity: 2 A at 250 VAC
• MTBF: 360,000 hours at 25 °C ambient operating temperature
• Channel fault response reporting delay: ≤ 20 ms after overload detection

Material Composition

• Front Panel Housing: ABS flame retardant impact-resistant industrial plastic
• Circuit Substrate: Double-sided FR-4 flame retardant PCB with gold-plated backplane edge connectors
• Switching Components: Silver alloy contact mechanical signal relays with epoxy sealed packaging
• Surge Suppression: Metal oxide varistors (MOV) and freewheeling diodes for inductive load protection
• Terminal Blocks: Screw-type PA66 flame retardant terminals for high-current field load wiring
• Internal Passive Components: Carbon film resistors, ceramic safety capacitors

Structural Characteristics

• Single-width standard D20 rack slot footprint, fully interchangeable with all D20 I/O modules
• Front panel wiring terminal zone separated from internal relay assembly by heat insulation partition
• Independent metal heat sink for each relay coil to dissipate continuous energization thermal load
• Dual side spring locking latches for secure rack insertion and hot swap maintenance
• Front panel LED channel indicators aligned with corresponding load wiring terminals for rapid state verification

Working Principle

Advantage Highlights

1. Wide AC/DC load voltage compatibility eliminates separate AC and DC output module stocking requirements
2. Integrated inductive load surge protection removes external snubber circuit installation cost
3. High mechanical relay cycle life reduces long-term field replacement frequency
4. Hot-swappable rack design enables online maintenance without full production line shutdown
5. Independent channel overload protection prevents cascading module damage from single-channel load short circuit
6. Standardized D20 rack form factor simplifies spare parts inventory management

Applicable Industries

Model Series Affiliation

Installation Requirements

1. Insert module horizontally into Metso D20 series DIN rack backplane slot, fully engage gold-plated edge connector pins
2. Lock dual side spring latches to fix module position; confirm power LED illumination after rack power energization
3. Field load wiring minimum cross-section: 1.0 mm² copper cable for full 5 A rated load operation
4. Inductive load (solenoid valve) wiring must maintain separate cable routing from low-voltage analog signal cables
5. Connect rack cabinet protective earth ground to eliminate static charge accumulation on relay contacts
6. Tighten screw-type wiring terminals to calibrated torque value 0.7 N·m

Operation & Maintenance Precautions

1. Hot swap replacement must only be executed after de-energizing all field load circuits connected to module output terminals
2. Inspect relay contact condition every 12 months; replace module if contact arcing blackening is visible on terminal connectors
3. Do not connect load current exceeding 5 A to any single output channel to avoid relay contact welding failure
4. Avoid installing module in environments with high sulfur vapor or conductive metal dust to prevent contact corrosion
5. Configure relay latching mode only for non-safety critical auxiliary equipment control loops
6. Store spare modules in dry constant-temperature warehouse with humidity controlled below 60% to prevent relay coil oxidation