Product Summary
The IS220PDIOH1B Discrete I/O Pack extends the functionality of the GE Mark VIe Speedtronic system. It manages discrete signals for gas, steam, and wind turbine automation. This unit operates reliably in hazardous locations with approved terminal boards. Its robust design ensures precise control in demanding industrial environments.
Theme A: Product Procurement & Buyer Guide
Why Choose the IS220PDIOH1B for Your Turbine System?
Procurement managers need a reliable I/O pack for critical turbine assets. The IS220PDIOH1B excels in this role. It works within the versatile Mark VIe platform. This platform supports simplex, dual, and triple-redundant configurations. Your team can integrate this pack seamlessly into existing architectures. It uses the standard ControlST software suite for configuration. This compatibility reduces training time for your engineering staff. The pack also represents a marked improvement over earlier Mark series iterations. Those older systems were limited to steam and gas applications. This unit extends support to wind turbine drive assemblies as well.

Key Technical Specifications for Engineers
Engineers must verify voltage and environmental ratings before purchase. The IS220PDIOH1B operates at a nominal voltage rating of 28.0 V DC. Its minimum voltage rating is 27.4 V DC. This ensures stable performance within tight power budgets. The ambient temperature rating spans from -30 to +65 degrees Celsius. This wide range allows deployment in harsh outdoor or enclosed turbine cabinets. The unit features two Ethernet ports for high-speed networked I/O. A local processor and data acquisition board handle internal logic. The entire base printed circuit board has a conformal coating. This protects against daily wear and tear from vibration and debris.
Essential Companion Components
You must pair this pack with specific terminal boards for full functionality. The pack extends the capability of standard PDIO packs. It typically works with two accessory terminal boards. Approved examples include the ISx0yTDBSH2A and ISx0yTDBTH8A. These boards are labeled as Intrinsically Safe Apparatus Relay Contact types. They provide twenty-four field terminals for wiring connections. All positive terminals are labeled as contact-wetting inputs. Refer to the official datasheet for negative terminal differences. This combination is approved for use in hazardous locations. Ensure you follow specific field wiring instructions for wire size and screw torque.

Theme F: Deep-Dive Technical FAQ
What does the front panel LED array indicate?
The front panel provides immediate diagnostic feedback for operators. You will find LED indicators for both Ethernet ports. A separate LED shows the unit’s power status. An “attn” LED alerts you to specific attention conditions. Additional LEDs relate directly to relay connection statuses. This array allows for rapid troubleshooting without opening the cabinet.
Is the electronics technology in this pack still current?
The electronics technology for the Mark VIe I/O packs is now obsolete. GE introduced this technology in 2004. However, the pack remains a critical component for existing turbine fleets. Many facilities still rely on this hardware for daily operations. You can source this unit as a replacement or spare part. It is one of the final GE Mark series to feature the patented Speedtronic control technology. This technology was first introduced with the Mark I in the late 1960s.

What physical dimensions and weight should I expect?
The chassis uses a vented style for passive cooling. The dimensions are 4.5 inches wide, 3.5 inches high, and 2.25 inches deep. The unit itself weighs less than 2 pounds. The shipping weight is approximately 2.5 pounds. This compact form factor fits easily into standard control panel racks.
Logistics & Standard Packaging Details
- One GE IS220PDIOH1B Discrete I/O Pack
- Anti-static protective packaging for safe transit
- We offer express delivery shipping via FedEx, UPS, and DHL

