MTL CPS16

Model Series

Technical Specifications

• Slot Capacity: 16 independent plug-in barrier module slots
• Rated Supply Voltage: 24 V DC nominal, operating range 19.2 V DC – 28.8 V DC
• Power Distribution: Dual redundant power bus rails integrated into baseplate PCB
• Termination Type: Screw-clamp terminal blocks for safe-area field circuit wiring
• Maximum Per-Slot Current: 150 mA continuous per barrier module slot
• Bus Isolation: 2.5 kV AC isolation between field circuit bus and power supply bus
• Mechanical Mounting: Compatible with standard 35 mm DIN rail and surface panel mounting brackets
• Overall Dimensions: 310 mm (L) × 110 mm (W) × 65 mm (H)
• Total Weight: 0.62 kg

Performance Parameters

• Power Bus Parallel Capacity: Multiple CPS16 baseplates may be wired in parallel for shared redundant 24 V DC power supply
• Terminal Torque Rating: 0.8 N·m maximum screw terminal tightening torque
• Insulation Resistance: ≥ 1000 MΩ between power bus and field signal bus at 500 V DC test voltage
• Operating Temperature Range: -20 °C to +60 °C
• Storage Temperature Range: -40 °C to +85 °C
• Relative Humidity Tolerance: 5% – 95% RH non-condensing continuous operation

Material Composition

• Baseplate PCB: Flame-retardant FR-4 V0 rated printed circuit board
• Terminal Block Housings: High-temperature thermoplastic polyamide PA66 flame resistant material
• Conductive Bus Bars: Tin-plated copper alloy power distribution rails
• Mounting Frame: Galvanized cold-rolled steel DIN rail clip bracket
• Terminal Screws: Nickel-plated steel anti-corrosion fasteners
• Labeling Cover: Transparent polycarbonate removable channel identification cover

Structural Features

• Uniform 16 independent interchangeable slots; all MTL intrinsic safety barrier models install in any slot position without fixed ordering requirements
• Dual parallel redundant 24 V DC power rails integrated into PCB to support dual power supply redundancy architecture
• Screw-clamp terminal blocks segregate safe-area power wiring and hazardous-area field signal wiring
• Removable transparent plastic labeling cover for slot channel number identification and wiring documentation
• Integrated DIN rail clip mounting foot for direct snap-on installation to standard 35 mm DIN mounting rails
• Ground bus terminal integrated at baseplate edge for system protective earth connection

Working Principle

1. External redundant 24 V DC industrial power supply connects to baseplate power bus screw terminals; dual parallel power rails provide failover power feed to all 16 module slots.
2. Each installed intrinsic safety barrier module draws regulated power from shared baseplate power bus via edge card connector contacts.
3. Hazardous area field sensor wiring terminates to dedicated screw-clamp signal terminals, routed through PCB isolation circuits to barrier module signal pins.
4. Internal PCB isolation barriers separate high-power supply circuits from low-level field measurement signal circuits to maintain intrinsic safety certification compliance.
5. Protective earth ground bus connects all module chassis grounds to single unified grounding terminal for electrostatic discharge and surge protection.

Core Function Features

1. 16 universal interchangeable slots supporting mixed MTL safety barrier models on single baseplate assembly
2. Dual redundant 24 V DC power distribution bus for uninterrupted barrier module operation during single power supply failure
3. Screw-clamp industrial wiring terminals eliminating loose wiring contact failure risks
4. Full intrinsic safety circuit isolation maintaining ATEX / IECEx hazardous area certification compliance
5. Integrated unified grounding bus for all installed safety barrier modules
6. Removable transparent labeling cover for channel identification and wiring traceability
7. Multi-mount compatibility: DIN rail snap-on and surface panel bolt mounting bracket support

Advantage Highlights

1. Single baseplate consolidates 16 separate safety barrier installations to reduce cabinet wiring complexity and space occupation
2. Redundant power bus design eliminates need for separate power distribution wiring for each individual barrier module
3. Mixed-model barrier slot compatibility allows flexible combination of analog input, digital input and relay output safety barriers
4. Integrated isolation circuits maintain full hazardous area intrinsic safety certification without additional external isolation hardware
5. DIN rail snap-on mounting enables rapid cabinet assembly and reconfiguration during plant commissioning
6. Parallel baseplate power bus capability supports large-scale distributed hazardous area measurement systems

Applicable Industries

Installation Requirements

1. Mount baseplate horizontally onto standard 35 mm DIN rail inside classified safe-area control cabinet
2. Secure baseplate ground terminal to cabinet protective earth bus with minimum 2.5 mm² copper grounding cable
3. Torque all power and signal terminal screws to 0.6–0.8 N·m specified torque range
4. Maintain minimum 20 mm vertical clearance above and below baseplate for cabinet air circulation
5. Route hazardous area field wiring and safe-area power wiring into separate dedicated terminal blocks with no cross-wiring
6. When paralleling multiple CPS16 baseplates, connect power bus terminals in daisy-chain parallel configuration with adequate gauge power cables

Operation & Maintenance Precautions

1. Do not install non-MTL uncertified barrier modules into baseplate slots; intrinsic safety certification will be voided
2. Ensure cabinet ambient temperature never exceeds +60 °C continuous operating limit to prevent terminal insulation degradation
3. Tighten all terminal block screws every 6 months to compensate for thermal cycling induced wire loosening
4. Prevent dust, oil vapor and chemical condensation accumulation on baseplate PCB and terminal contacts
5. Disconnect both redundant power supply feeds before removing or inserting barrier modules to avoid live contact arcing
6. Do not modify baseplate PCB trace routing or add external wiring taps to integrated power bus rails
7. Replace cracked or damaged terminal block plastic housings immediately to maintain flame resistance and isolation integrity