GE IS220PSCAH1A Serial Modbus Communication I/O Pack
Mark VIe PSCA I/O Pack: 6×Configurable Serial Channels, Modbus RTU/TCP, Dual Ethernet, Redundant Power
1. Core Product Overview
The GE IS220PSCAH1A is a Mark VIe PSCA (Serial Communication) I/O Pack, serving as the interface between Mark VIe controllers and serial field devices (e.g., flow meters, transmitters, HMIs) in gas/steam turbine control systems. It features 6 individually configurable serial transceiver channels (RS232/RS422/RS485 half‑duplex), dual 100MB full‑duplex Ethernet ports, and Modbus RTU/TCP master/slave protocol support, enabling seamless integration with legacy serial devices and modern Ethernet I/O networks. The pack integrates with Mark VIe I/O backplanes via DC‑37 pin connectors and supports simplex/dual/TMR redundant systems for fault‑tolerant operation. It includes dual 24/28V DC redundant power inputs, optical isolation (≥2.5 kV) between field and logic sides, and LED indicators for power, communication, and I/O status. Designed for -40°C to +70°C industrial environments, it offers IP20 protection and conformal coating for reliable performance in power generation, oil & gas, and petrochemical applications.
• Core Role: 6‑channel serial communication; Modbus RTU/TCP master/slave; serial‑to‑Ethernet conversion; dual Ethernet I/O integration
• Model Info: IS220PSCAH1A (full part number); PSCA serial I/O pack; Mark VIe Speedtronic series; conformal coating; made in USA
• Key Specs: 6×serial channels; dual 100MB Ethernet; 24/28V DC dual power; -40°C~+70°C temp; 0.36 A max current
• Reliability: Simplex/dual/TMR redundancy; surge suppression; EMC immunity; 24‑month warranty; CE/UL certified
2. Communication Configuration & Protocol Support
The IS220PSCAH1A provides flexible serial communication configuration for turbine control applications, with 6 individually configurable channels supporting RS232 (50 ft/15 m max), RS422 (4000 ft/1200 m max), or RS485 half‑duplex (4000 ft/1200 m max) standards. Each channel supports Modbus RTU master/slave, Modbus ASCII, or serial‑to‑Ethernet protocol conversion, with configurable baud rates (1200–115200 bps), data bits (7/8), parity (even/odd/none), and stop bits (1/2). The pack uses dual 100MB Ethernet ports for Mark VIe controller communication and Modbus TCP master/slave protocol support, enabling connection to up to 18 Modbus TCP/RTU slaves. It includes a serial Modbus master service for polling field devices and a serial‑to‑Ethernet protocol converter for legacy device integration. Removable terminal strips (compatible with IS200SSCAH1A/IS200SSCAH2A) enable easy wiring maintenance, and LED indicators provide real‑time status feedback for power, communication, and I/O health.
• Serial Channels: 6×configurable (RS232/RS422/RS485); baud 1200–115200 bps; data bits 7/8; parity even/odd/none; stop bits 1/2
• Ethernet: Dual 100MB full‑duplex; Modbus TCP master/slave; Mark VIe I/O network; dual redundant network support
• Protocol Support: Modbus RTU master/slave; Modbus TCP master/slave; ASCII; serial‑to‑Ethernet conversion
• Isolation & Protection: ≥2.5 kV optical isolation; surge suppression; individual channel protection; dual power input switching
3. Integration & Compliance
The IS220PSCAH1A integrates with Mark VIe controllers via dual 100MB Ethernet ports and DC‑37 pin backplane connectors, enabling high‑speed data transfer for critical control loops. It supports ControlST/ToolboxST software for configuration, fault diagnostics, and firmware updates, with LED indicators for quick visual inspection of power, communication, and I/O health. The pack complies with IEC 61010‑1 electrical safety, IEC 61000‑4 EMC immunity, and UL 61010 standards, with ATEX Zone 2/Class I, Div 2 certification for hazardous area operation. It is designed for panel mounting in standard industrial enclosures, with dual 24/28V DC power inputs (22.8–28.6 VDC) and soft‑start circuits to ensure stable operation during power fluctuations. The pack meets IEC 61508 SIL 2 requirements in certified architectures, with fault isolation between channels to prevent single‑point failures from disabling system functions.
• System Integration: Mark VIe I/O backplane; ControlST/ToolboxST; LED status monitoring; real‑time serial/Ethernet data transfer
• Power Supply: Dual 24/28V DC inputs (22.8–28.6 VDC); soft‑start circuits; overvoltage/undervoltage protection; 0.36 A max current
• Compliance: CE/UL 61010/IEC 61000‑4; ATEX Zone 2/Class I, Div 2; IEC 61508 SIL 2 (certified); RoHS compliant
• Environmental: -40°C~+70°C temp; 5–95% non‑condensing humidity; IP20 protection; conformal coating
4. Safety & Industrial Applications
The IS220PSCAH1A is built for industrial safety and reliability, with dual redundant power inputs and simplex/dual/TMR controller communication to prevent single‑point failures from disrupting serial communication functions. Its 6 configurable serial channels ensure reliable data exchange with legacy field devices (e.g., flow meters, pressure transmitters, HMI panels), triggering safety interlocks if communication failures or data anomalies occur. The pack’s optical isolation (≥2.5 kV) prevents electrical interference from damaging control logic, and surge suppression protects against voltage spikes in harsh industrial environments. Typical applications include gas/steam turbine control, combined cycle power plants, oil & gas compressors, and petrochemical process control, where reliable serial communication is essential for safe and efficient operation.
• Safety Features: Serial communication monitoring; communication failure alarm; fault isolation; SIL 2 capability (certified); ESD execution
• Industrial Sectors: Power generation (gas/steam turbines); oil & gas (upstream/midstream); petrochemical; chemical processing; turbine OEMs
• System Topologies: Simplex/dual/TMR redundancy; serial control loops; legacy device integration; Ethernet I/O networks; safety interlocks
• Network Security: I/O isolation; fault diagnostics; real‑time alarm reporting; access control via ControlST; network fault monitoring
5. Installation & Maintenance
Installation: Panel mount; dual 24/28V DC power connection; DC‑37 pin backplane; terminal strip wiring (IS200SSCAH1A/IS200SSCAH2A); ControlST initial setup.
Configuration: Serial channel setup (RS232/RS422/RS485); protocol config (Modbus RTU/TCP); redundancy setup; LED status verification; Ethernet parameter setting.
Maintenance: Visual inspection (burn marks, loose connections); terminal strip cleaning; serial channel test; 6‑month preventive maintenance.
Quality & Warranty: GE genuine module; factory‑tested for Mark VIe compatibility; 24‑month standard warranty; technical support for serial communication configuration and system integration.
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Technical Documentation | GE IS220PSCAH1A | PSCA Serial Modbus Communication I/O Pack for Mark VIe Speedtronic Turbine Control
