TMEICA ARND-3620

Technical Specifications

1. Total Independent Output Channels: 32 discrete switching channels, evenly divided into four isolated 8-channel electrical groups
2. Output Drive Topology: NPN sinking transistor output
3. Nominal Field Load Supply Voltage: 24 VDC; allowable operating voltage window: 19 VDC ~ 27 VDC
4. Single Channel Continuous Rated Current: 0.4 A DC
5. Transient Peak Inrush Current Per Channel: 1.5 A DC, maximum sustainable duration 80 ms
6. Maximum Total Permitted Load Current Per 8-Channel Isolated Group: 3.5 A DC
7. Galvanic Isolation Voltage Rating: 1500 VDC optical isolation between rack backplane logic circuit and field load circuits
8. Backplane Communication Interface: Standard TMEIC high-speed PLC internal rack bus
9. Channel Switch Response Latency: ≤110 μs turn-on delay, ≤90 μs turn-off delay
10. Built-In Surge Suppression: Bidirectional TVS diode array per channel, maximum withstand inductive reverse voltage 55 V
11. Operating Ambient Temperature Range: -10 °C ~ +60 °C cabinet internal air temperature
12. Storage Temperature Range: -40 °C ~ +85 °C
13. Module External Dimension: 110 mm Height × 34 mm Width × 120 mm Depth single-width compact rack form factor
14. Ingress Protection Rating: IP20 indoor cabinet exclusive installation
15. Net Weight: 0.33 kg

Functional Features

1. 32 high-density independent output channels within single-width rack module, maximizing actuator control channel count in limited cabinet rack space
2. Four electrically separated 8-channel isolated power groups supporting four independent external 24VDC load power circuits for zone-divided process control safety partitioning
3. Individual per-channel electronic short-circuit cutoff protection; fault flag uploaded to PLC main CPU without impacting operation of other channels or groups
4. User-selectable global fail-safe logic: all outputs de-energize or retain last switching state upon backplane communication failure
5. Single-channel LED status indicator array: green light for channel active ON state, red light for overcurrent/short-circuit fault alarm
6. Hot-swap rack plug-in module design; module replacement available without full PLC rack power isolation
7. All internal control logic power supplied entirely via rack backplane bus; no separate auxiliary control power terminal required

Working Principle

Material Composition

1. Module Enclosure Housing: UL94-V0 flame retardant black ABS plastic injection molded shell
2. Main Circuit PCB: Standard FR-4 high-temperature fiberglass substrate with lead-free tin plating surface finish
3. Isolation Components: Standard reinforced optical coupler chips with 1500 VDC dielectric isolation strength
4. Switching Power Devices: Low saturation voltage small-signal NPN power transistors optimized for medium continuous current loads
5. Surge Protection Hardware: Bidirectional surface-mount TVS diodes integrated on each output signal path
6. Wiring Terminal Block: PA66 insulated multi-group screw terminal strip with solid copper conductive pins

Structural Characteristics

1. Standard single-width 34 mm vertical stacking mechanical form factor fully compatible with all TMEIC ARND series rack I/O modules
2. Rear integrated multi-pin gold-plated spring contact strip for rack backplane bus communication and internal logic power supply feed
3. Front panel detachable multi-group screw terminal block segmented by four isolated 8-channel power banks for separated zone wiring management
4. Internal PCB layered shielding design separates low-voltage logic signal area and high-current field switching area to minimize electromagnetic crosstalk
5. Side integrated mechanical locking buckle fastens module securely to PLC rack DIN rail to resist factory equipment continuous vibration

Advantage Highlights

1. 32-channel ultra-high density design delivers maximum actuator control capacity per rack slot, reducing overall PLC cabinet size and hardware investment cost
2. Four independent isolated power groups enable strict electrical separation of different process safety zones without cross-circuit interference
3. Per-channel independent short-circuit protection limits failure impact to a single actuator channel instead of entire power group shutdown
4. Integrated TVS surge suppression removes requirement for external flyback diodes on small inductive loads, simplifying field wiring layout
5. Standardized TMEIC backplane bus architecture supports seamless mixing with all ARND series input/output modules in unified PLC rack system
6. Hot-swap maintenance capability eliminates full rack power shutdown, cutting production downtime during faulty module replacement operations

Applicable Industries

Installation Requirements

1. Install module only within IP54 or higher rated sealed industrial PLC control cabinet; avoid direct exposure to dust, liquid water, corrosive chemical vapor
2. Field actuator wiring must utilize shielded twisted pair cable; all cable shielding terminated at cabinet main earth terminal strip at single grounding point only
3. Each 8-channel isolated power group fitted with minimum 8 A rated overcurrent circuit breaker on external 24VDC load power supply
4. Maintain minimum 15 mm vertical airflow clearance between adjacent rack I/O modules for natural passive heat convection cooling
5. PLC rack metal frame rigidly connected to dedicated equipment protective earth bus to suppress radiated electromagnetic interference noise

Usage Precautions

1. Forbid connecting field supply voltage exceeding 27 VDC to output terminals; permanent irreversible breakdown of internal switching transistors occurs
2. Single-channel load current must not exceed 0.4 A continuous rating to prevent long-term thermal degradation of power switching devices
3. Execute per-channel short-circuit protection function calibration every 12 months for safety-critical process interlock control circuits
4. Disconnect all four external 24VDC field power circuits before detaching front wiring terminal block to eliminate accidental channel short-circuit risks
5. Store spare modules in constant low-humidity anti-static packaging to avoid electrostatic discharge damage to onboard optical coupler components