Original GE PSCA serial‑communication I/O pack for Mark VIe system, gateway between IONet Ethernet and Modbus‑RTU serial field devices.

Product Overview

IS220PSCAH1A is PSCA serial communication I/O pack for GE Speedtronic Mark VIe control system. It acts as protocol gateway between controller IONet Ethernet network and legacy serial field devices. Equipped with six configurable isolated serial channels, it supports RS‑232, RS‑422, RS‑485 physical standards and Modbus‑RTU master/slave protocol, completes data interaction with transmitters, actuators and third‑party serial instruments. Dual Ethernet ports connect to redundant IONet network. Rugged compact metal housing fits continuous cabinet operation. Widely used as maintenance spare part for gas‑steam turbine, generator and power‑plant control cabinets.

Key Features

• Six independently configurable optically‑isolated serial channels, supports RS‑232, RS‑422, RS‑485 half‑duplex interface
• Supports Modbus‑RTU master and slave mode, realizes data exchange with serial smart field equipment
• Dual 10/100Mbps Ethernet interfaces for redundant IONet network connection with Mark VIe controller
• Wide configurable baud‑rate range: 300‑115200 baud for diverse serial device matching
• Front‑panel LED indicators for port communication status and module fault diagnosis
• Compact I/O‑pack form factor, supports hot‑swap operation within Mark VIe remote I/O rack

• Optical isolation design improves anti‑interference performance for mixed‑signal cabinet environment

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Technical Specifications

• Brand: GE (Vernova)
• Model: IS220PSCAH1A
• Module Type: PSCA Serial Communication I/O Pack
• System Platform: Speedtronic Mark VIe / Mark VIeS
• Serial Channels: 6 channels, optically isolated
• Serial Standard: RS‑232, RS‑422, RS‑485 half‑duplex
• Protocol: Modbus‑RTU master / slave
• Communication: Dual 10/100Mbps IONet Ethernet
• Power Supply: 18‑30VDC, nominal 24VDC
• Operating Temp: ‑40℃ ~ +65℃
• Storage Temp: ‑40℃ ~ +85℃
• Humidity: 5‑95% non‑condensing

• Installation: Plug‑in inside Mark VIe remote I/O rack

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Compatibility

Compatible with GE Mark VIe turbine control system. Serial‑device parameter matching, cable inspection and IONet communication test required after replacement.