Model Interpretation

IS230: Mark VIe distributed I/O pack series

SNID: Safety Isolated Digital Input (32‑channel isolated input)

H: Hardware revision

1A: Firmware/configuration variant

Technical Parameters

Input Specifications

Channels: 32 isolated digital inputs, grouped into 4 banks of 8

Input Types: Dry contact (sink/source) or 24 VDC wet contact

Input Voltage Range: 18–32 VDC; logic “1” ≥18 VDC, logic “0” ≤5 VDC

Isolation: 2500 Vrms channel‑to‑backplane; 500 Vrms between banks

Response Time: <1 ms typical

Debounce: Software‑configurable per channel (0–255 ms)

Communication

Ethernet: 2 × 10/100 Mbps RJ45 (redundant IONet)

Protocols: IONet, SRTP; supports redundant controller architectures

Data Update: 10 ms minimum scan rate

Electrical

Power: 24 VDC (18–32 VDC) from backplane

Power Consumption: ~6 W typical

Mechanical & Environmental

Dimensions (H×W×D): 82.6 × 38.1 × 133.4 mm (3.25 × 1.5 × 5.25 in)

Weight: ~0.36 kg (0.8 lb)

Operating Temperature: −25°C to +70°C

Storage Temperature: −40°C to +85°C

Humidity: 5–95% non‑condensing

Protection: IP20; conformal coated; fanless

Certifications: CE, UL, CSA, Class I Div 2; SIL 3 capable

Indicators

LEDs: Power, Run, Fault, Network Link/Activity

Per‑bank status LEDs for quick fault identification

Core Functions

32‑Channel Isolated Monitoring: Captures discrete status from field devices with high noise immunity.

Safety‑Rated Inputs: Suitable for ESD and safety interlock circuits in Mark VIeS SIS.

Redundant Network Support: Dual Ethernet ports enable seamless failover in TMR/DMR systems.

Diagnostics & Fault Reporting: Open/short‑circuit detection; fault logging via ControlST.

Hot‑Swap: Online replacement without system shutdown.

Configuration Flexibility: Debounce, polarity, and bank grouping set via software.

Applications

Power Generation: Gas/steam turbine auxiliary status (valve limits, lube oil pressure, trip signals).

Safety Systems (SIS): Emergency shutdown (ESD), fire & gas, and safety interlock monitoring.

Oil & Gas: Compressor stations, offshore platforms, and hazardous‑area discrete sensing.

Heavy Industry: Petrochemical, pulp & paper, and metallurgical plant critical status monitoring.

Usage & Maintenance Instructions

Installation: Plug into Mark VIe I/O rack; secure faceplate screws; ensure airflow clearance.

Wiring: Use shielded cable for field inputs; separate low‑voltage I/O from high‑voltage wiring.

Configuration: Assign channels in ControlST; set debounce and input polarity.

Maintenance: Inspect connectors and LEDs monthly; clean vents annually; update firmware as needed.

Compatibility: Works with Mark VIe/VIeS controllers (e.g., IS420UCSB); mates with standard terminal boards.