Description
GE IS220PDIAH1A (336A4940CSP1) Product Description
Product Overview
The GE IS220PDIAH1A, order code 336A4940CSP1, is a Packaged Discrete Contact Input (PDIA) I/O pack built for the GE Speedtronic Mark VIe turbine control system. It acts as the rugged field interface between dry-contact field devices and the core control platform.
This module captures 24 channels of switch status signals from field equipment and transmits conditioned data to the main controller over redundant Ethernet links. It integrates an on-board 32 VDC contact wetting supply, eliminating the need for external field power sources. Designed for hot-swap operation and multi-level redundant architectures, it delivers reliable signal acquisition for mission-critical turbine protection and control loops in harsh power generation environments.
GE IS220PDIAH1A 336A4940CSP1
Core Product Features
- 24 independently isolated dry-contact input channels handle valve position, breaker status, limit switch and safety interlock signals in one compact pack.
- On-board 32 VDC contact wetting output powers passive field switches directly, simplifying field wiring and reducing external components.
- Fixed 4 ms hardware debounce filter suppresses contact bounce and electrical noise, preventing false signal detection.
- Dual 100 Mbps full-duplex Ethernet ports support redundant network communication and seamless integration with Mark VIe control backbones.
- Fully hot-swappable design allows module replacement without rack power shutdown, minimizing system downtime during maintenance.
- Channel-to-channel and channel-to-backplane electrical isolation blocks ground loops and voltage surges from field wiring.
- Front-panel LED indicators for power, attention and link status enable quick on-site diagnostics and fault identification.
- Supports simplex, dual and triple modular redundant (TMR) configurations to match different system reliability requirements.
- Factory-applied conformal coating protects circuitry from humidity, oil mist and dust typical of turbine house environments.
GE IS220PDIAH1A 336A4940CSP1
Technical Specifications
| Item | Specification |
|---|---|
| Model Number | IS220PDIAH1A |
| Order Code | 336A4940CSP1 |
| Product Type | Packaged Discrete Contact Input (PDIA) I/O Pack |
| Compatible Platform | GE Speedtronic Mark VI / Mark VIe Turbine Control System |
| Input Channels | 24 independent, electrically isolated dry-contact inputs |
| Contact Wetting Supply | 32 VDC nominal, 27.4 VDC minimum |
| Input Debounce | 4 ms fixed hardware filter |
| Communication Interface | Dual 10/100 Mbps full-duplex Ethernet (RJ-45) |
| Redundancy Modes | Simplex, dual, triple modular redundant (TMR) |
| Power Input | 28 VDC nominal via terminal board interface |
| Power Consumption | 0.81 A maximum at 28 VDC |
| Operating Temperature | -40°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Ingress Protection | IP20, conformal coated |
| Compatible Terminal Boards | IS200STCIH1A, IS200TBCIH4C, IS200STCIH8A, IS200TBCIH2C |
| Certifications | CE, UL, CSA, industrial EMC compliance |
Application Fields
- Gas and steam turbine safety interlock, valve position and limit switch signal acquisition in thermal power plants
- Circuit breaker and disconnect switch status monitoring in power generation and distribution systems
- Dry-contact signal collection for safety instrumented systems in oil, gas and petrochemical facilities
- Rotating machinery condition monitoring and fault status feedback for compressors, pumps and motors
- Legacy Mark V / Mark VI control system retrofit and Mark VIe platform migration projects
- Industrial process control discrete signal interfacing for critical interlock and sequence logic
GE IS220PDIAH1A 336A4940CSP1
Related Model Recommendations
- IS220PDIOH1A: Integrated discrete input/output I/O pack with 24 inputs and 12 relay outputs, combining PDIA and PDOA functions to save rack space.
- IS220PDIAH1B: Updated-technology discrete input pack from the same family, backward compatible with existing Mark VIe installations.
- IS220PDOAH1A: Packaged discrete output I/O pack, paired with PDIA modules to form complete discrete control loops.
- IS215UCVEH2AE: Mark VIe main controller CPU that communicates with and manages PDIA I/O packs over the control network.
