The IS220PCNOH1B is a communication gateway unit supporting GE Mark VIe distributed turbine control systems, defined as a CANopen master conversion module in hardware architecture. It fulfills bidirectional protocol conversion between the IONet industrial Ethernet bus and standard CANopen fieldbus.
Equipped with an independent protocol processing chip, the module can be directly installed into I/O racks of Mark VIe systems. It connects downstream field devices complying with the CANopen CiA301 specification, including servo drives, remote data acquisition nodes, valve positioners and intelligent transmitters. Upstream, it exchanges real-time process data, fault alarms and equipment status signals with Mark VIe controllers.
It resolves communication compatibility issues where third-party CANopen smart devices cannot be directly connected to GE main control systems, and is widely deployed in control architectures of power generation, oil & gas refining units operating 24/7 without interruption.
Model Code Breakdown
Full Model: IS220PCNOH1B
IS220: Unified prefix for all Mark VIe I/O modules, representing rack-mounted distributed industrial control cards.
PCN: Function classification code, short for CANopen Master Gateway.
OH: Hardware enclosure specification code, standard universal housing compatible with standard backplane slots of the system.
1: Major hardware revision number, standing for the original base hardware architecture.
B: Minor hardware revision. Compared with Revision 1A, it is upgraded in operating temperature range, EMC anti-interference performance and bus fault tolerance.
Product Features
Bus Interface Configuration
Dual 10/100 Mbps auto-adaptive IONet Ethernet ports and two independent CANopen bus terminal channels. The bus rate is adjustable from 125 kbit/s to 1 Mbit/s.Protocol Compliance
CANopen complies with CiA301 basic protocol and CiA402 servo drive extension protocol. Upper-layer communication adopts Mark VIe exclusive SRTP real-time transport protocol.Power Supply Specifications
Standard 24 V DC system power input with allowable voltage fluctuation from 22.5 VDC to 30 VDC. Built-in overvoltage, reverse polarity and surge protection circuits.Hardware Protection
Galvanic isolation between all channels; Ethernet and CANopen buses are mutually isolated to prevent interference from field devices from feeding back into the main control system. The full metal housing provides overall grounding shielding.Data Processing Capacity
A single module supports up to 64 CANopen slave nodes, enabling bidirectional read/write of cyclic process data (PDO) and acyclic parameter data (SDO).Fault Self-Protection Mechanism
Automatically cuts off the corresponding channel upon bus short-circuit while other channels maintain normal communication. An onboard hardware watchdog restarts the module automatically to restore communication in case of program exceptions.Mounting Specifications
Direct plug-in installation into standard Mark VIe I/O rack slots without extra DIN rail accessories. A dedicated 62-pin terminal board is used for all bus wiring.Certifications
Compliant with UL508 safety standard for industrial control equipment and CE EMC certification, suitable for control systems deployed on units in Class II hazardous locations.Application Industries
Thermal Power Generation
Main control systems for gas turbines, steam turbines and combined cycle power units, connecting external CANopen smart actuators, speed servos and flue gas monitoring acquisition nodes.Oil & Gas Production and Refining
Integrated control systems for fracturing units, compressor packages and heating furnaces, interfacing with intelligent regulating valves, flow servos and explosion-proof field acquisition modules.Chemical Process Industry
Continuous process control for large reactors and distillation columns, connected to servo-driven feed pumps, intelligent level transmitters and pressure transmitters.Industrial Compressor Stations
Centralized monitoring of centrifugal and screw compressors. The CANopen gateway collects operational data including unit vibration, temperature and load servo status.Waste Heat Power Generation Auxiliaries
Auxiliary control of waste heat boilers, interlocked with CANopen air damper actuators and water pump servo regulation units.Product Comparison
IS220PCNOH1B vs IS220PCNOH1A
IS220PCNOH1A: Original hardware revision with an operating temperature range of -30℃ ~ 65℃. It adopts simple bus fault tolerance logic and tends to suffer communication disconnections under low-voltage conditions, and is gradually phased out for new projects.
IS220PCNOH1B: Optimized revised version. Its low-temperature resistance is extended to -40℃, with upgraded bus short-circuit protection circuits to ensure stable operation down to 22.5 VDC. Optimized EMC wiring reduces communication failure rates in high-electromagnetic industrial sites, making it the preferred model for all new projects at present.
IS220PCNOH1B vs IS220MODAH1B (Modbus Gateway Module)
IS220PCNOH1B: Designed for motion-control CANopen servos and intelligent valve manifolds, featuring high-speed cyclic data transmission suitable for dynamic regulation control scenarios.
IS220MODAH1B: Executes Modbus RTU/TCP protocol conversion, focusing on static parameter collection from conventional transmitters and remote I/Os without support for high-speed motion control.
Supporting Products
- Mark VIe Series Main Control UnitsIS220UCSAH1A, IS220UCSBH1B system controllers, the core logic computing hardware of the whole control system.
- Dedicated Matching Terminal BoardIS200PCNOTH1A CANopen bus wiring terminal board, matching the module’s 62-pin output interface.
- System Communication SwitchIS220SWCH1A rack-mounted Ethernet switch for constructing the IONet system bus network.
- Redundant Power Supply UnitIS220PSCAH1A rack power supply module providing stable 24 VDC input power.
- Supporting Diagnostic ToolHandheld infrared diagnostic device for reading module fault codes and online status of bus nodes.
- Shielded Communication CablesTwisted-pair shielded CAN bus cables and industrial CAT6 shielded Ethernet cables.
- System HMIMark VIe matching operation display screen for real-time monitoring of gateway bus communication data.
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